C44

Konstantinopolsky Opening

1.e4 e5 2.Nf3 Nc6 3.g3

A00

Koola-Koola

1.h4 a5

C74

Kopaiev Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5 6.exf5 Bxf5 7.O-O

B50

Kopec System, Sicilian

1.e4 c5 2.Nf3 d6 3.Bd3

E97

Korchnoi Attack, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Bd2

B23

Korchnoi Defense, Sicilian

1.e4 c5 2.Nc3 e6 3.g3 d5

D20

Korchnoi Gambit, QGA

1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Kf1

A28

Korchnoi Line, English

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.a3

E21

Korchnoi Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5

A80

Korchnoi's Variation, Dutch

1.d4 f5 2.h3

A16

Korchnoi's Variation, English

1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.g3 Bg7 6.Bg2 e5

A52

Kornl Richter Gambit, Budapest

1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nc3 Bxc3+

C63

Kostic Defense, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Be7

C63

Kostic Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nf6 5.exf5 Bc5

C37

Kotov Gambit

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Bxf4

B50

Kotov Gambit, Sicilian

1.e4 c5 2.Nf3 d6 3.g3 b5

A40

Kotov Variation, Modern

1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nc6

A40

Kotov-Robatsch Defense

1.d4 g6 2.c4 Bg7

E98

Kozul Gambit, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.Ne1 Nd7 10.Be3 f5

E70

Kramer Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Nge2

E17

Kramnik Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Re1

B40

Kramnik Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.c4

D85

Kramnik's Line, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.h3

A21

Kramnik-Shirov Variation, English

1.c4 e5 2.Nc3 Bb4

D17

Krause Attack, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5

C47

Krause Gambit, Four Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5

A84

Krause Variation, Dutch

1.d4 f5 2.c4 Nf6 3.Nc3 d6 4.Nf3 Nc6

C41

Krause Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O

A45

Kraus-Muhlherr Counter Gambit

1.d4 Nf6 2.f3 d5 3.e4 e5 4.dxe5 Nxe4

C23

Kreijcik Gambit, Bishop

1.e4 e5 2.Bc4 Nf6 3.f3 Bc5 4.Ne2 Nc6 5.b4

C20

Krejcik Gambit

1.e4 e5 2.f3 Nf6 3.Bc4 Bc5 4.Ne2 Nc6 5.b4

B02

Krejcik Variation, Alekhine

1.e4 Nf6 2.Bc4 

C15

Kunin Double Gambit, French

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 dxe4 5.Qg4 Qxd4

C22

Kupreichik Variation, Center

1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 Nf6 5.Nc3 Bb4 6.Bd2 O-O 7.O-O-O Re8 8.Bc4

B56

Kupreichik Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bd7

A13

Kurajica Defense, English

1.c4 e6 2.Nf3 d5 3.g3 c6

B09

Kurajica Variation, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3

C57

Kurkin Gambit, Two Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 6.Bf1 h6 7.Nxf7

B40

Kveinis Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Qb6

C40

Labourdonnais Gambit

1.e4 e5 2.Nf3 Qf6 3.Bc4 Qg6 4.O-O

C53

Labourdonnais Variation, Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 d6 5.d4 exd4 6.cxd4 Bb6

C23

Labourdonnais-Denker Gambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.c3

D00

Lamb Defense, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Nc6

C21

Lanc-Arnold Gambit, Center

1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3

B12

Landau Gambit, Caro-Kann

1.e4 c6 2.d4 d5 3.Bd3 Nf6 4.e5 Nfd7 6.e6

D12

Landau Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 Qc8 7.Bd2 e6 8.Na3

D00

Lange Gambit; Alfred Lange Gambit; Simple Variation

1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4

C51

Lange Variation, Evans Gambit

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bb6 5.b5 Na5 6.Nxe5 Nh6

D00

Langeheinecke Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e3

A02

Langheld Gambit, Bird

1.f4 e5 2.fxe5 d6 3.exd6 Nf6

C41

Larobok Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7

A00

Laroche Gambit, Dunst

1.Nc3 b5

E62

Larsen Defense, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Bf5

B20

Larsen Defense, Smith-Morra Accepted, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O Qc7 8.Qe2 Bd6

B04

Larsen Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 dxe5

D86

Larsen Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Qd7

D86

Larsen Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Qd7 9.O-O b6

E90

Larsen Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be3

C41

Larsen Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 g6

D47

Larsen Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5

D25

Larsen; Janowski; Modern Variation, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4

A01

Larsen; Queen's Fianchetto; Nimzo-Larsen Attack A01

1.b3

B21

Larsen-Santasiere (McDonnell Attack) Variation, Sicilian; B21

1.e4 c5 2.f4

C20

Lasa Gambit

1.e4 e5 2.c3 f5

C52

Lasker Defense, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.O-O Bb6

D53

Lasker Defense, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 Ne4

A02

Lasker Gambit, Bird

1.f4 e5 2.fxe5 f6

A00

Lasker Simul Special

1.g3 h5

D08

Lasker Trap, QGD

1.d4 d5 2.c4 e5 3.dxe5 d4 4.e3 Bb4+ 5.Bd2 dxe3

B02

Lasker Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5

A02

Lasker Variation, Bird

1.f4 e5 2.fxe5 d6 3.exd6 Bxd6 4.Nf3 g5

B01

Lasker Variation, Center Counter

1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 6.h3

A83

Lasker Variation, Dutch

1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 g6 5.f3

C12

Lasker Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3

C42

Lasker Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2

D56

Lasker Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7

B33

Lasker-Pelikan Variation, Sicilian

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5

C40

Latvian Gambit Accepted

1.e4 e5 2.Nf3 f5 3.exf5

C40

Latvian; Greco Counter-Gambit

1.e4 e5 2.Nf3 f5

D06

Lazard Gambit, Chigorin Defense

1.d4 d5 2.c4 Nc6 3.Nf3 e5

A45

Lazard Gambit; Maddigan Gambit

1.d4 Nf6 2.Nd2 e5

B53

Lazy Knight Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 Nd7

D70

Leko Gambit

1.d4 Nf6 2.c4 g6 3.f3 e5

A05

Lemberg Gambit, Zukertort

1.Nf3 Nf6 2.e4

D00

Lemberger Counter-Gambit, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 e5

B00

Lemming Defense

1.e4 Na6

A86

Leningrad Variation, Dutch

1.d4 f5 2.c4 Nf6 3.g3 g6

C04

Leningrad Variation, French

1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Ndf3 cxd4 8.cxd4

E30

Leningrad Variation, Nimzo-Indian; E30

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5

C33

Leonardo (Stamma) Gambit, KGA

1.e4 e5 2.f4 exf4 3.h4

B01

Leonhardt (Rosen) Gambit, Center Counter

1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.b4

C47

Leonhardt Defense, Four Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5 Qe7

C52

Leonhardt Variation, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 b5

C40

Leonhardt Variation, Latvian

1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.Nc3

C44

Leonhardt Variation, Ponziani

1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Nf6

C90

Leonhardt Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 Na5 9.Bc2 c5 10.d4 Qc7 11.h3 Nc6 12.d5 Nd8 13.Nbd2 g5

B88

Leonhardt Variation, Sicilian; B88

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6

C33

Lesser Bishop; Tartakower

1.e4 e5 2.f4 exf4 3.Be2

E62

Lesser Simagin (Spassky) Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bf5

A04

Lessing Defense; Black Mustang Defense

1.Nf3 Nc6

D97

Levenfish Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 b6

B71

Levenfish Variation, Sicilian; B71

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4

C40

Levenstein; Queen's Defense; Brazilian; Gunderam

1.e4 e5 2.Nf3 Qe7

C23

Lewis Countergambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6

C23

Lewis Counter-Gambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.c3 d5

C53

Lewis Defense, Italian; Closed Variation

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7

C23

Lewis Gambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.d4

C67

L'Hermet Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6

C42

Lichtenhein Defense, Petroff

1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3 d5

A00

Liebig Gambit, Dunst

1.Nc3 e5 2.e3 d5 3.Qh5 Nf6

D44

Lilienthal Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7

D20

Linares Variation, QGA

1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 Nf6 5.Nc3 b5

A45

Linder Counter Gambit

1.d4 Nf6 2.f3 e6 3.e4 Nxe4

B00

Linksspringer Variation, Nimzovich Defense

1.e4 Nc6 2.d4 e5 3.d5

C41

Lion Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Nc3 Nf6

B07

Lion's Jaw, Pirc

1.e4 d6 2.d4 Nf6 3.f3

B90

Lipnitzky Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4

A42

Lisbon Gambit

1.d4 d6 2.c4 e5 3.dxe5 Nc6

A80

Lisbon Gambit, Dutch; Krejcik Gambit

1.d4 f5 2.g4

A06

Lisitsin Gambit Deferred, Zukertort

1.Nf3 f5 2.d3 Nf6 3.e4

A04

Lisitsin Gambit; Polish Gambit

1.Nf3 f5 2.e4 

A40

Lithuanian Variation, Mikenas

1.d4 Nc6 2.c4 e5 3.d5 Nce7

A40

Lizard Defense; Pirc-Diemer Gambit

1.d4 g6 2.h4 Nf6 3.h5

B28

Ljubojevic Line, Sicilian

1.e4 c5 2.Nf3 a6 3.c3 b5

B09

Ljubojevic Variation, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bc4

C40

Lobster Gambit, Latvian

1.e4 e5 2.Nf3 f5 3.g4

C41

Locock Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Ng5 h6 5.Nxf7

D33

Lodz; Schlecter; Rubinstein Var, QGD; D33

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3

A10

Loehn Gambit, English

1.c4 d5 2.cxd5 e6

C57

Lolli Attack, 2 Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4

C44

Lolli Attack, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4

C56

Loman Defense, 2 Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be6 9.Ng5 g6

A00

London Defense, Grob

1.g4 e5 2.h3 Nc6

C44

London Defense, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bb4+

A46

London System

1.d4 Nf6 2.Nf3 e6 3.Bf4

A48

London System, Torre Attack

1.d4 Nf6 2.Nf3 g6 3.Bf4

D02

London System; Queen's Bishop Opening

1.d4 d5 2.Nf3 Nf6 3.Bf4

A09

London V; New York V, Reti

1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bb2 Bf5

A48

London Variation

1.d4 Nf6 2.Nf3 g6 3.Bf4 Bg7 4.Nbd2

C39

Long Whip Variation, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h5

C41

Lopez Counter-Gambit, Philidor

1.e4 e5 2.Nf3 d6 3.Bc4 f5

C33

Lopez Defense, KGA

1.e4 e5 2.f4 exf4 3.Bc4 c6

C84

Lopez Four Knights, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Nc3

C23

Lopez Gambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.Qe2 Nf6 4.f4

C23

Lopez Variation, Bishop

1.e4 e5 2.Bc4 Bc5 3.Qe2

B58

Louma Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nxc6

C02

Lputian Variation, French

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 Nh6

C50

Lucchini Gambit; Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 f5

C60

Lucena Defense, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Be7

A40

Lundin Defense

1.d4 Nc6

D80

Lundin Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Nxe4 dxc3 6.Qd2 c5

A56

Lundin; Bronstein Counter-Gambit

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 b5

D47

Lundin; Neo-Meran

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4

B31

Lutikov Gambit, Sicilian

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 Nf6 6.d4

D70

Lutikov Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3

C90

Lutikov Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.Bc2

C90

Lutikov Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.Bd2

C68

Lutikov Variation, Ruy Lopez Exchange

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6

C33

MacDonnell Attack, KGA

1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 Ne7 7.g3

C23

MacDonnell Gambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.b4

C37

MacDonnell Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Nc3

C77

Mackenzie Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4

C20

Macleod Attack

1.e4 e5 2.c3

C34

MacLeod Defense, KGA

1.e4 e5 2.f4 exf4 3.Nf3 Nc6

C44

MacLopez; Relfsson Gambit, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bb5

D00

Mad Dog Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.h4

A45

Maddigan Gambit

1.d4 Nf6 2.Nc3 e5

C30

Mafia Defense, KGD

1.e4 e5 2.f4 c5

C40

Mail Line, Latvian Gambit Accepted

1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4

A57

Main Line, Benko Gambit Declined

1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3

B52

Main Line, Canal Attack, Sicilian; B52

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 

D19

Main Line, Czech Variation, Slav; D19

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.O-O O-O 9.Qe2

C52

Main Line, Evans Gambit; C52

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5

D80

Makogonov Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.b4

D94

Makogonov Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.b4

E71

Makogonov Variation, KID; E71

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3

C45

Malaniuk Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bb4+

A45

Malich Gambit

1.d4 Nf6 2.Nc3 d5 3.Bg5 c5 4.Bxf6 gxf6 5.e4 dxe4 6.d5

C83

Malkin Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5

A45

Maltese Falcon

1.d4 Nf6 2.g4 Nxg4 3.f3 Nf6 4.e4

A10

Malvinas Variation, English

1.c4 d5 2.cxd5 Qxd5 3.Nc3 Qa5

A80

Manhattan Gambit, Dutch

1.d4 f5 2.Qd3 Nf6 3.g4

D51

Manhattan; Westphalia Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4

D23

Mannheim Variation, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+

B00

Mao Tse Tung; Duras

1.e4 f5

D18

Mareschall Variation, Slav; Lasker Variation

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 Na6

B62

Margate (Vitolins) Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Bb5

A47

Marienbad Variation

1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5

B20

Marienbad Variation, Sicilian

1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Bb2

C25

Mariotti Gambit

1.e4 e5 2.Nc3 Nc6 3.g3 Bc5 4.Bg2 h5 5.Nf3 h4

B28

Maroczy Bind, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.c4

B36

Maroczy Bind, Sicilian; B36

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4

B07

Maroczy Defense, Pirc

1.e4 d6 2.d4 e5

C40

Maroczy Gambit

1.e4 e5 2.Nf3 d5 3.exd5 Bd6

B12

Maroczy Gambit, Caro-Kann

1.e4 c6 2.d4 d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 exd4 6.Bc4

B74

Maroczy Line, Sicilian Dragon

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 Be6 10.f4 Na5

C49

Maroczy Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Ne2

B02

Maroczy Variation, Alekhine

1.e4 Nf6 2.d3

B12

Maroczy Variation, Caro

1.e4 c6 2.d4 d5 3.f3

C14

Maroczy Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 a6

C40

Maroczy; Elephant Gambit

1.e4 e5 2.Nf3 d5 3.exd5 Bd6

C18

Maroczy-Willis Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 cxd4 6.axb4 dxc3

C30

Marshall (Euwe) Attack, KGD

1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 Bg4 5.fxe5 dxe5 6.Qa4+

C89

Marshall Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5

C31

Marshall C-G, KGD

1.e4 e5 2.f4 d5 3.exd5 c6

C89

Marshall Counter-Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.d4

D06

Marshall Defense; Knight Defense, QGD

1.d4 d5 2.c4 Nf6 

C48

Marshall Gambit, Four Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5 5.Nxe5 Nd4 6.Ba4 O-O

B00

Marshall Gambit, Nimzovich

1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 4.Nc3

B01

Marshall Gambit, Scandanavian G; Modern Variation, CC

1.e4 d5 2.exd5 Nf6  

D31

Marshall Gambit, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 

B23

Marshall Gambit, Sicilian

1.e4 c5 2.Nc3 e6 3.d4 d5

D32

Marshall Gambit, Tarrasch

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.e4

C56

Marshall Variation, 2 Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be7 9.Ng5 Qd5 10.Nc3 Qf5

B01

Marshall Variation, Center Counter

1.e4 d5 2.exd5 Nf6 3.d4 Nxd5

C10

Marshall Variation, French

1.e4 e6 2.d4 d5 3.Nc3 c5

C42

Marshall Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6

B20

Marshall Variation, Sicilian

1.e4 c5 2.b4 cxb4 3.a3 

B41

Marshall Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 d5

B10

Masi Variation, Caro-Kann

1.e4 c6 2.d4 Nf6

D00

Mason Attack, Queen Pawn Game

1.d4 d5 2.f4

C40

Mason Countergambit, Latvian

1.e4 e5 2.Nf3 f5 3.d4

C54

Mason Gambit, Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.O-O

C42

Mason Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O O-O

C42

Mason-Showalter Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6

B10

Massachussets Defense, Caro-Kann

1.e4 c6 2.d4 f5

B06

Masur Gambit

1.e4 g6 2.d4 Nh6 3.Nc3 f5 4.Bxh6 Bxh6 5.exf5 O-O

B82

Matanovic Attack, Sicilian; B82

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4

B00

Matovinsky Gambit

1.e4 b6 2.d4 Bb7 3.Bd3 f5

B00

Matovinsky Gambit

1.e4 b6 2.d4 Bb7 3.Bd3 f5 4.exf5 Bxg2 5.Qh5+ g6

B02

Matsukevich Gambit, Alekhine

1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 Nxc3 6.dxc3 d6 7.Bg5

A89

Matulovic Variation, Dutch; A89

1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 Nc6

C33

Maurian Defense, KGA

1.e4 e5 2.f4 exf4 3.Bc4 Nc6

C56

Max Lange Attack

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5

C40

Mayet Attack, Latvian

1.e4 e5 2.Nf3 f5 3.Bc4 

C38

Mayet Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.d4 d6 6.c3

A22

Mazedonisch Variation, English

1.c4 e5 2.Nc3 Nf6 3.f4

C40

McConnell Defense

1.e4 e5 2.Nf3 Qf6

C12

McCutcheon Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4

C33

McDonnell Attack, KGA

1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 

D20

McDonnell Defense, QGA

1.d4 d5 2.c4 dxc4 3.e4 e5

C23

McDonnell Double Gambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.f4

A39

Mecking Variation, Symmetrical English; A39

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4

C01

Mediterranean Defense, French

1.e4 e6 2.d4 Nf6

A50

Medusa Gambit

1.d4 Nf6 2.c4 g5

C23

Meitner-Mieses Gambit, Vienna

1.e4 e5 2.Nc3 Nc6 3.Bc4 Bc5 4.Qg4 Qf6 5.Nd5

A00

Melleby Gambit, Dunst

1.Nc3 d5 2.f4 d4 3.Ne4 c5

C20

Mellon Gambit

1.e4 e5 2.Qh5 Nc6 3.Bc4 Nh6 4.d3 g6 5.Qf3 f6 6.Ne2 d5

B20

Mengarini Gambit, Sicilian

1.e4 c5 2.a3 

B20

Mengarini Gambit, Sicilian

1.e4 c5 2.a3 Nc6 3.b4

C20

Mengarini Opening

1.e4 e5 2.a3

C26

Mengarini Variation, Vienna

1.e4 e5 2.Nc3 Nf6 3.a3

D47

Meran Variation, QGD; D47

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4

C53

Mestel Variation, Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6 6.Bg5

C49

Metger Unpin Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Bxc3 8.bxc3 Qe7 9.Re1 Nd8

A09

Michel Gambit, Reti

1.Nf3 d5 2.c4 d4 3.b4 c5

C37

Middleton Counter-Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 d6 5.O-O Bg4 6.h3 h5 7.hxg4

C52

Mieses Defense, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O Nge7

B12

Mieses Gambit, Caro

1.e4 c6 2.d4 d5 3.Be3

B01

Mieses Variation, Center Counter

1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6

C45

Mieses Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6

C26

Mieses Variation, Vienna

1.e4 e5 2.Nc3 Nf6 3.g3

D00

Mieses; Nimzovich Var, BDG

1.d4 d5 2.e4 dxe4 3.f3 Nc6

D00

Mieses; Nimzovich Var, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nc6

A00

Mieses; Valencia; Venezuelan Opening

1.d3  

B01

Mieses-Kotroc Variation, Center Counter

1.e4 d5 2.exd5 Qxd5

C20

Miguel Gambit

1.e4 e5 2.Bb5 Bc5 3.b4

B02

Mikenas Gambit, Alekhine

1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 7.Nxd5 exd5 8.Bxd5

A66

Mikenas V, Benoni

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5

B00

Mikenas Variation, Nimzovich Defense

1.e4 Nc6 2.d4 d6

A15

Mikenas-Carls Variation, English

1.c4 Nf6

D45

Mikhalchishin Line, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 dxe4 8.Nxe4 Nxe4 9.Qxe4 e5 10.dxe5

D31

Miladinovic Gambit, QGD

1.d4 d5 2.c4 e6 3.Nc3 Be7 4.e4 dxe4 5.f3

C30

Miles Defense, KGD

1.e4 e5 2.f4 Nc6 3.Nf3 f5

C31

Miles Gambit, KGD

1.e4 e5 2.f4 d5 3.exd5 Bc5

E12

Miles Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Bf4

C42

Millenium Attack, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Bd3

C45

Millennium Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Qg6

B15

Milner-Barry Gambit, Caro; Rasa-Studier Gambit

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.f3

C02

Milner-Barry Gambit, French

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3

C02

Milner-Barry Gambit, French

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd3 7.cxd3 Bd7 8.O-O Nxd4 9.Nxd4

E33

Milner-Barry Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6

E33

Milner-Barry, Zurich Variation, Nimzo-Indian; E33

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6

C67

Minckwitz Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.dxe5

B11

Mindeno Variation, Caro-Kann

1.e4 c6 2.Nc3 d5 3.Nf3 Bg4

B06

Mittenberger Gambit, Modern Defense

1.e4 g6 2.d4 Bg7 3.Nc3 d5

C40

Mlotkowski Variation, Latvian

1.e4 e5 2.Nf3 f5 3.Nc3

C43

Modern Attack, Petroff

1.e4 e5 2.Nf3 Nf6 3.d4

A60

Modern Benoni

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6

C55

Modern Bishop's Opening

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3

A40

Modern Defense

1.d4 g6 2.c4 Bg7 3.Nc3 d6

E76

Modern Defense, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 Na6

D78

Modern Defense, Neo-Grunfeld

1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O dxc4

D20

Modern Defense, QGA

1.d4 d5 2.c4 dxc4 3.e4 Nc6

C45

Modern Defesne, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3 Bb4

D06

Modern Gambit, Chigorin Defense

1.d4 d5 2.c4 Nc6 3.Nc3 Nf6 4.Nf3 dxc4

D11

Modern Line, Slav; D11

1.d4 d5 2.c4 c6 3.Nf3

D85

Modern Main Line, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3

B84

Modern Paulsen, Sicilian; B84

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6

E05

Modern Sharp Variation, Catalan

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nc6 6.Qa4 Bb4+

C71

Modern Steinitz Defense, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6

C32

Modern Transfer, Falkbeer Countergambit, KGD

1.e4 e5 2.f4 d5 3.exd5 exf4

A57

Modern Variation, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.e3

B12

Modern Variation, Caro-Kann

1.e4 c6 2.d4 d5 3.Nd2

A01

Modern Variation, Larsen

1.b3 e5

D50

Modern Variation, QGD; D50

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5

B50

Modern Variation, Sicilian; B50

1.e4 c5 2.Nf3 d6

C27

Modern Variation, Vienna

1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4

B10

Modern; English Variation, Accelerated Panov; Caro-Kann

1.e4 c6 2.c4

C63

Moehring Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 d5 6.Nxe5 dxe4 7.Nxc6 Qd5

C54

Moeller (Therkatz) Attack, Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5

C78

Moeller Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5

B02

Mokele Mbembe; Knight's Tour

1.e4 Nf6 2.e5 Ne4

B27

Mongoose Variation, Sicilian

1.e4 c5 2.Nf3 Qa5

B06

Mongredien Defense, Pirc

1.e4 g6 2.d4 Bg7 3.Nf3 b6

B06

Monkey's Bum, Pirc

1.e4 g6 2.Bc4 Bg7 3.Qf3 e6 4.d4

C27

Monster Variation, Vienna

1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7

C01

Monte Carlo Variation, French

1.e4 e6 2.d4 d5 3.exd5 exd5 4.c4

A40

Montevideo Defense

1.d4 Nc6 2.d5 Nb8

E11

Monticelli Trap

1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Bxd2+ 5.Qxd2 b6 6.g3 Bb7 7.Bg2 O-O 8.Nc3 Ne4 9.Qc2 Nxc3 10.Bg5

C42

Moody Gambit, Petroff

1.e4 e5 2.Nf3 Nf6 3.Qe2 Nc6 4.d4

C40

Morgado Defense, Latvian

1.e4 e5 2.Nf3 f5 3.Bc4 Nf6

C03

Morozevich Variation, French

1.e4 e6 2.d4 d5 3.Nd2 Be7

C51

Morphy Attack, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.Nc3 

B20

Morphy Defense Deferred, Smith-Morra Accepted

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O b5 8.Bb3 Bc5

C32

Morphy Defense, KGD

1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nc3 Bb4 6.Bd2 e3

C68

Morphy Defense, Ruy Lopez; C68

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6

C70

Morphy Defense, Ruy Lopez; C70

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4

B20

Morphy Defense, Smith-Morra Accepted, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bc5

C01

Morphy Gambit, French

1.e4 e6 2.d4 d5 3.Nh3

C41

Morphy Gambit, Philidor

1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Bc4

B20

Morphy Gambit, Sicilian

1.e4 c5 2.d4 cxd4 3.Nf3

D00

Morris Counter-Gambit

1.d4 d5 2.Bf4 c5 3.e4 dxe4

D00

Morris Gambit

1.d4 d5 2.Bf4 c5 3.e4 

C65

Mortimer Trap, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7 5.Nxe5 c6

C65

Mortimer Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7

B55

Moscow (Prins) Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3

B51

Moscow Gambit, Sicilian

1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.c3 a6 6.Bxc6 Bxc6 7.Re1 Nf6 8.d4 Bxe4 9.Bg5

C17

Moscow Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Qg4

B51

Moscow Variation, Sicilian; Canal Attack; B51

1.e4 c5 2.Nf3 d6 3.Bb5+

A40

Mosquito Gambit, Englund

1.d4 e5 2.dxe5 Qh4

C82

Motzko Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Qd3

A02

Mujannah Opening

1.f4 Nf6 2.c4

D70

Murey Attack, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 c5 5.cxd5 Nxd5 6.Na4

E12

Murey Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 c5 8.e4 Nxc3 9.bxc3 Nc6 10.Bb2 cxd4 11.cxd4 Rc8 12.Rd1 Bd6

C43

Murret Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 Nc6

A57

Mutkin Countergambit, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.g4

C37

Muzio-Polerio Gambit, KGA; Wild Muzio

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O

B20

Myers Attack, Sicilian

1.e4 c5 2.h4

A02

Myers Defense, Bird

1.f4 b5

A10

Myers Defense, English

1.c4 g5 2.d4 Bg7

A00

Myers Defense, Hungarian

1.g3 g5

B02

Myers Gambit, Alekhine

1.e4 Nf6 2.Nc3 d5 3.d3 dxe4 4.Bg5

A00

Myers Gambit, Dunst

1.Nc3 d5 2.e4 dxe4 3.Nxe4 e5 4.Bg5

A00

Myers Gambit, Kadas

1.h4 d5 2.d4 c5 3.e4

A05

Myers Polish Attack

1.Nf3 Nf6 2.a4 g6 3.b4

A00

Myers Variation, Polish

1.b4 d5 2.Bb2 c6 3.a4

C56

Nachmanson Gambit, 2 Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 6.Nc3

D85

Nadanian Attack

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4

B90

Najdorf Variation, Sicilian; B90

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6

C20

Napoleon Attack

1.e4 e5 2.Qf3

A00

Napoleon Attack, Dunst

1.Nc3 e5 2.Nf3

A00

Napoleon Attack, Dunst

1.Nc3 e5 2.Nf3 Nc6 3.d4

C44

Napoleon Gambit, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4 4.Nxd4 exd4 5.Bc4

A30

Napolitano Gambit, Symmetrical English

1.c4 c5 2.Nf3 Nf6 3.b4

B00

Naselwaus Variation, Owen's Defense

1.e4 b6 2.d4 Bb7 3.Bg5

A19

Nei Gambit, English

1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8

C82

Nenarokov Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Qd3 Ne7

A13

Neo Catalan Accepted, English

1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4

A14

Neo Catalan Declined, English

1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O

A13

Neo Catalan, English

1.c4 e6 2.Nf3 d5 3.g3 Nf6

D55

Neo Orthodox Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6

A09

Neo-Catalan, Reti

1.Nf3 d5 2.c4 e6 3.g3

C35

Neo-Cunningham Gambit, KGA; McCormick Defense

1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Nf6

D70

Neo-Grunfeld Defense

1.d4 Nf6 2.c4 g6 3.Nf3 d5

A40

Neo-Modern Defense

1.d4 g6 2.c4 Bg7 3.e4 e5

B00

Neo-Mongoloid Defense, Nimzovich

1.e4 Nc6 2.d4 f6

D54

Neo-Orthodox Variation, QGD; D54

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Rc1

C78

Neo-Steinitz Defense, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 d6

A57

Nescafe Frappe Attack, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5

D00

Netherlands Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 f5

C39

Neumann Defense, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nc6

C44

Neumann Gambit, Ponziani

1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.Bc4

B12

New Caro-Kann

1.e4 c6 2.d4 d5 3.Nd2 g6

C70

Nightingale Gambit, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5 6.Bxf7+

C44

Nikitin Gambit, Ponziani

1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5 dxe4 5.Nxe5 Qd5 6.Qa4

A90

Nimzo-Dutch Variation

1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bb4+

A17

Nimzo-English Opening

1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4

E20

Nimzo-Indian Defense

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4

D00

Nimzovich Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.Ne5

C02

Nimzovich Attack, French

1.e4 e6 2.d4 d5 3.e5 c5 4.Qg4

C40

Nimzovich Attack, Latvian

1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Ne3

C42

Nimzovich Attack, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3

E15

Nimzovich Attack, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qa4+

C62

Nimzovich Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 Bd7 4.Nc3 Nf6 5.Bxc6

D70

Nimzovich Attack; Anti-Grunfeld; Alekhine Variation

1.d4 Nf6 2.c4 g6 3.f3

B00

Nimzovich Defense

1.e4 Nc6

B00

Nimzovich Gambit, Nimzovich Defense

1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Ne5

A06

Nimzovich Opening, Reti; Nimzovich-Larsen Attack

1.Nf3 d5 2.b3

E11

Nimzovich Variation, Bogo-Indian

1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7

A83

Nimzovich Variation, Dutch

1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 b6

A20

Nimzovich Variation, English

1.c4 e5 2.Nf3

C02

Nimzovich Variation, French

1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3

C31

Nimzovich Variation, KGD; Anderssen Attack

1.e4 e5 2.f4 d5 3.exd5 e4 4.Bb5+

A61

Nimzovich Variation, Knight's Tour Variation, Benoni

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Nd2

E15

Nimzovich Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6

B32

Nimzovich Variation, Sicilian; Nimzo-American Variation

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d5

A46

Nimzovich Variation, Torre Attack

1.d4 Nf6 2.Nf3 e6 3.Bg5 h6

B16

Nimzovich; Bronstein-Larsen, Caro; B16

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6

B29

Nimzovich; Rubinstein Var, Sicilian; B29

1.e4 c5 2.Nf3 Nf6

C77

Nimzovich; Tarrasch Var, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Nc3

A20

Nimzovich-Flohr Variation, English

1.c4 e5 2.Nf3 e4

C31

Nimzovich-Marshall Variation, KGD

1.e4 e5 2.f4 d5 3.exd5 c6

C47

Noa Gambit, Four Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Nxe4 5.Bxf7+

E34

Noa Variation, Nimzo-Indian; E34

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5

C71

Noah's Ark Trap, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.d4 b5 6.Bb3 exd4 7.Nxd4 Nxd4 8.Qxd4 c5 9.Qd5 Be6 10.Qc6+ Bd7

B02

Noch Gambit, Alekhine

1.e4 Nf6 2.Nc3 d5 3.exd5

E81

Normal Defesne, Sameisch Variation, KID; E81

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O

D08

Normal Line, Albin Countergambit, QGD

1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3

C51

Normal Position, Evans Gambit

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6

B28

Normal System, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.d4

A52

Normal Variation, Budapest; A52

1.d4 Nf6 2.c4 e5 3.dxe5 Ng4

A85

Normal Variation, Dutch

1.d4 f5 2.c4 Nf6

C10

Normal Variation, French; C10

1.e4 e6 2.d4 d5 3.Nc3

A50

Normal Variation, Indian Game; A50

1.d4 Nf6 2.c4

E97

Normal Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7

E70

Normal Variation, KID; E70

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4

E46

Normal Variation, Nimzo-Indian; E46

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O

A55

Normal Variation, Old Indian; A55

1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4

C78

Normal Variation, Ruy Lopez; C78

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O

D45

Normal Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7

A34

Normal Variation, Symmetrical English; A34

1.c4 c5 2.Nc3

C30

Norwalde (Norwalder) Variation, KGD

1.e4 e5 2.f4 Qf6

C20

Norwalder Gambit

1.e4 e5 2.c3 d5 3.Qh5 Bd6

B06

Norwegian Defense

1.e4 g6 2.d4 Nf6

D31

Noteboom Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4

B72

Nottingham Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Nb3

D20

Novikov Gambit, QGA

1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nd2

A00

Novosibirsk Variation, Dunst

1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4

A00

Nowokunski Gambit, Dunst

1.Nc3 e5 2.f4 exf4 3.e4

C60

Nuremberg Defense, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 f6

C65

Nyholm Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d4 exd4 5.O-O

A04

Oberndorfer Gambit; Reti

1.Nf3 g5

D00

O'Kelly Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c6

E26

O'Kelly Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 b6

B28

O'Kelly Variation, Sicilian; B28

1.e4 c5 2.Nf3 a6

E48

Olafsson Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 b6 9.Qe2 Bb7 10.Rd1 Qc8

A43

Old Benoni

1.d4 c5 2.d5 d6

A06

Old Indian Attack

1.Nf3 d5 2.d3

A53

Old Indian Defense; Chigorin Indian Defense; A53

1.d4 Nf6 2.c4 d6

C32

Old Line, Falkbeer Countergambit, KGD

1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Qe2

D48

Old Meran Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.O-O

B30

Old Sicilian

1.e4 c5 2.Nf3 Nc6

D20

Old Variation, QGA

1.d4 d5 2.c4 dxc4 3.e3

D48

Old Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5

E33

Old Zurich Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6 6.a3

C12

Olland (Dutch) Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bc1

C25

Omaha Gambit, Vienna

1.e4 e5 2.Nc3 d6 3.f4

A45

Omega Gambit

1.d4 Nf6 2.e4

A08

Omega-Delta Gambit, KIA

1.Nf3 d5 2.g3 e5

E04

Open Defense, Catalan; E04

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3

C07

Open System Tarrasch French; C07

1.e4 e6 2.d4 d5 3.Nd2 c5

C56

Open Variation, Two Knights Defense; C56

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4

D80

Opocensky Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd2

D94

Opocensky Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Bd2

E17

Opocensky Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3 Ne4 7.Bd2

B92

Opocensky Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5

B92

Opocensky Variation, Sicilian; B92

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2

D78

Original Defesne, Neo-Grunfeld; D78

1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6

C33

Orsini Gambit, KGA

1.e4 e5 2.f4 exf4 3.b3

E85

Orthodox Variation, KID; E85

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5

E91

Orthodox Variation, KID; E91

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2

D60

Orthodox Variation, QGD; D60

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7

C00

Orthoschapp Variation, French

1.e4 e6 2.c4 d5 3.cxd5 exd5 4.Qb3

A45

Oshima Defense

1.d4 Nf6 2.g4 e5

A00

Outflank Variation, Polish

1.b4 c6  

B00

Owen's Defense; Greek Defense

1.e4 b6

C47

Oxford Gambit, Four Kngihts

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.d5 Nd4

C26

Oxford Variation, Vienna

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3

A85

Ozol Variation, Dutch

1.d4 f5 2.c4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Bg5

D80

Pachman Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 dxc4 7.Bxc4 Nbd7 8.Ng5

A45

Paleface Attack

1.d4 Nf6 2.f3

E83

Panno Formation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6

E60

Panno System

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O Nc6 7.d5 Na5

E60

Panno Variation

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O a6 8.h3 Rb8

E63

Panno Variation, KID; E63

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O a6

E41

Panov Attack, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Nf3 cxd4 6.exd4 d5

B01

Panov Transfer, Center Counter

1.e4 d5 2.exd5 Nf6 3.c4 c6

B04

Panov Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.h3

B76

Panov Variation, Sicilian Dragon

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.g4

B07

Panov; Opatijav; Byrne Variation, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5

B13

Panov-Botvinnik; Gunderam Attack

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4

C30

Panteldakis Countergambit, KGD

1.e4 e5 2.f4 f5

C00

Papa-Ticulat Gambit, French

1.e4 e6 2.b3 d5 3.Bb2

A00

Paris Gambit

1.Nh3 d5 2.g3 e5 3.f4

C33

Paris Gambit, KGA

1.e4 e5 2.f4 exf4 3.Ne2

D80

Paris Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3

B08

Parma Defense, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Bg4

C44

Paschman Wing Gambit

1.e4 e5 2.Nf3 Nc6 3.b4

C23

Paschmann Gambit, Bishop

1.e4 e5 2.Bc4 Nf6 3.Ne2 Nxe4 4.Nec3

A01

Paschmann Gambit, Larsen

1.b3 e5 2.Bb2 Nc6 3.f4

C22

Paulsen Attack Variation, Center

1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 

C02

Paulsen Attack, French

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3

B00

Paulsen Attack, Nimzovich Defense

1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nf3

C42

Paulsen Attack, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nc4

C41

Paulsen Attack, Philidor

1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 d5 5.exd5

C45`

Paulsen Attack, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5

C29

Paulsen Attack, Vienna

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3

C40

Paulsen Counter-Gambit

1.e4 e5 2.Nf3 d5 3.exd5 e4

C39

Paulsen Defense Deferred, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bg7

C37

Paulsen Defense, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.e5 Qxe5 8.d3 Bh6 9.Nc3 Ne7 10.Bd2

C39

Paulsen Defense, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Bg7

C25

Paulsen Defense, Vienna

1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d6

B20

Paulsen Formation, Smith-Morra Accepted, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6

B28

Paulsen Line, Sicilian

1.e4 c5 2.Nf3 a6 3.c4 e6

C49

Paulsen Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Bxc6

C60

Paulsen Variation, Cozio Defense, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3 g6

C51

Paulsen Variation, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.d5 Na5 10.Bb2 Ne7

C61

Paulsen Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4 4.Nxd4 exd4 5.O-O Ne7

C45

Paulsen Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf5

B85

Paulsen Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Qc7 8.f4 Nc6

B45

Paulsen Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4

C25

Paulsen Variation, Vienna

1.e4 e5 2.Nc3 Nc6 3.g3

C44

Paulsen; Anderssen C-A, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.O-O d6 6.c3 Bg4

B41

Paulsen; Kan Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6

A45

Pawn Push Variation

1.d4 Nf6 2.d5

A57

Pawn Return Variation, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6

A66

Pawn Storm Variation, Benoni; A66

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4

A02

Pawn Thrust Attack, Bird

1.f4 f5 2.d4 d5

A44

Pawn Thrust, Benoni; A44

1.d4 c5 2.d5 e5

C00

Pelikan Variation, French

1.e4 e6 2.Nc3 d5 3.f4

B33

Pelikan Variation, Sicilian

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6

A09

Penguin Variation, Reti

1.Nf3 d5 2.c4 d4 3.Rg1

A61

Penrose Variation, Benoni

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bd3

B81

Perenyi Gambit, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4 e5 8.Nf5 g6 9.g5

C56

Perreux Variation, Two Knights Defense

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.Ng5

A40

Perrin Variation

1.d4 e6 2.c4 b6 3.e4 Bb7 4.Bd3 Nc6

C01

Perseus Gambit, French

1.e4 e6 2.d4 d5 3.Nf3

D00

Peters Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Ne5

C42

Petroff Defense; Russian Defense; C42

1.e4 e5 2.Nf3 Nf6

A46

Petrosian Gambit

1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5

D91

Petrosian System, Grunfeld; D91

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5

A56

Petrosian System; Czech Benoni Defense

1.d4 Nf6 2.c4 c5 3.d5 e5

C16

Petrosian Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Qd7

E92

Petrosian Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5

D55

Petrosian Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bxf6 Bxf6 8.Rc1 c6 9.Bd3 Nd7 10.O-O dxc4

E12

Petrosian Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3

C30

Petrov's Defense, KGD

1.e4 e5 2.f4 Nf6

A00

Pfeiffer Gambit, Dunst

1.Nc3 d5 2.f4 d4 3.Ne4 e5

D00

Pfrang Gambit, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6 5.fxe4 Bb4 6.Bd3 Bxc3+ 7.bxc3 Nxe4 8.Be3

C41

Philidor Counter Attack

1.e4 e5 2.Nf3 d6 3.d4 f5

C25

Philidor Countergambit, Vienna

1.e4 e5 2.Nc3 Nc6 3.d4 f5

C41

Philidor Defense; C41

1.e4 e5 2.Nf3 d6

C21

Philidor Gambit

1.e4 e5 2.d4 d6 3.dxe5 Bd7

C41

Philidor Gambit

1.e4 e5 2.Nf3 d6 3.d4 Bd7

C38

Philidor Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4

B07

Philidor Gambit, Pirc

1.e4 d6 2.d4 e5 3.dxe5 Bd7

C23

Philidor Variation, Bishop

1.e4 e5 2.Bc4 Bc5 3.c3

B00

Pickering (Goldsmith) Defense

1.e4 h5

B00

Picklepuss Defense

1.e4 h5 2.d4 Nf6

C31

Pickler Gambit, KGD

1.e4 e5 2.f4 d5 3.exd5 c6 4.dxc6 Bc5

C52

Pierce Defense, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4

C25

Pierce Gambit, Vienna

1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4

D00

Pietrowsky Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nc6

D55

Pillsbury Attack, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 b6 7.Bd3 Bb7 8.cxd5 exd5 9.Ne5

A41

Pillsbury Defense; A41; Rat Defense

1.d4 d6 

C49

Pillsbury Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Ne7

D63

Pillsbury Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 b6 8.cxd5 exd5 9.Bd3

C67

Pillsbury Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.b3

D40

Pillsbury Variation, Semi-Tarrasch

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.Bg5

C90

Pilnik Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d3

D12

Pin Defense, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4

B20

Pin Defense, Smith-Morra Accepted, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bb4

B41

Pin Variation; Sicilian CounterAttack

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4

C00

Pinova Gambit

1.e4 e6 2.b4 Bxb4 3.e5

B00

Pirc Connection, Nimzovich Defense

1.e4 Nc6 2.d4 g6

B07

Pirc Defense

1.e4 d6 2.d4 Nf6

E39

Pirc Variation, Nimzo-Indian; E39

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-O

D48

Pirc Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 b4

B06

Pirc; Robatsch; Modern; King Pawn Fianchetto; B06

1.e4 g6

B07

Pirc; Ufimtsev; Antal Defense

1.e4 d6 2.d4 Nf6 3.Nc3 g6

A02

Platz Gambit, Bird

1.f4 e5 2.fxe5 Ne7

B62

Podebrady Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nb3

D00

Pohlmann Variation, BDG

1.d4 d5 2.e4 dxe4 3.f3 f5

B97

Poisoned Pawn Accepted, Najdorf Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 Qxb2

C19

Poisoned Pawn Variation, French Winawer

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4

C40

Poisoned Pawn Variation, Latvian

1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2

B97

Poisoned Pawn Variation, Najdorf Sicilian; B97

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6

D02

Poisoned Pawn Variation, QP

1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Qb6 5.Nc3

B97

Poisoned Pawn Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2

A45

Poisoned Pawn Variation, Trompowsky

1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3

C58

Polerio Defense, Two Knights; C58

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5

C40

Polerio-Svedenborg Variation, Latvian

1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 d5

D78

Polgar Variation, Neo-Grunfeld

1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O Nc6

A40

Poli Gambit

1.d4 e6 2.c4 b6 3.e4 Bb7 4.f3 f5 5.exf5 Nh6

D00

Polish Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3 Bf5 5.Bg5

A40

Polish Defense

1.d4 b5 

A46

Polish Defense

1.d4 Nf6 2.Nf3 b5

A04

Polish G; Dalesio G; Pirc-Lisitsin G

1.Nf3 f5 2.e4 fxe4 3.Ng5

A00

Polish Gambit, Anderssen's Opening

1.a3 a5 2.b4

D00

Polish Gambit, BDG

1.d4 d5 2.e4 dxe4 3.Nc3

B27

Polish Gambit, Sicilian

1.e4 c5 2.Nf3 b5

A00

Polish Spike

1.b4 Nf6 2.Bb2 g6 3.g4

A40

Polish Variation

1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nf3 Qb6

B00

Polish Variation, St George Defense

1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 e6

A00

Polish; Orangutan; Sokolsky; Hunt

1.b4

C14

Pollock Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qg4

C25

Polluck Gambit, Vienna

1.e4 e5 2.Nc3 Nf6 3.g3 Bc5 4.Bg2 Nc6 5.Nge2 d5 6.exd5

E12

Polovodin Gambit, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 Nxd5 7.e4

E17

Polugaevsky Gambit, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nh4

B42

Polugaevsky Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5

B96

Polugaevsky; Accelerated Najdorf

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5

E72

Pomar System, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3 O-O 6.Bg2 e5 7.Nge2

E60

Pomar Variation, KID

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nge2

B47

Ponomariov Gambit, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 a6 8.Bb6

C24

Ponziani Center Gambit, Bishop

1.e4 e5 2.Bc4 Nf6 3.d4

C44

Ponziani Counter-Gambit

1.e4 e5 2.Nf3 Nc6 3.c3 f5

C44

Ponziani; Staunton; English Knights

1.e4 e5 2.Nf3 Nc6 3.c3 

C57

Ponziani-Steintz Gambit, Two Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Nxe4

A10

Porcupine Variation, English

1.c4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4

D31

Portisch Gambit, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.g4

B23

Portland Attack, Sicilian

1.e4 c5 2.Nc3 Nc6 3.d3 g6 4.g4

B01

Portuguese Gambit, Center Counter

1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7

C20

Portuguese Opening

1.e4 e5 2.Bb5

B01

Portuguese Variation, Center Counter

1.e4 d5 2.exd5 Nf6 3.d4 Bg4

D35

Positional Variation, Exchange Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5

A06

Potato, Zukertort

1.Nf3 d5 2.a4

C45

Potter Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3

A40

Pozarek Gambit

1.d4 Nc6 2.c4 e5 3.dxe5 Nxe5 4.Nc3 Nxc4

D33

Prague Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6

A80

Pretzel Gambit, Dutch

1.d4 f5 2.Qd3 Nf6 3.g4

D21

Prianishenmo Gambit, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5

A24

Prickly Pawn Pass System, English

1.c4 e5 2.Nc3 Nf6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4 O-O 7.Nge2 c6 8.O-O a6

D50

Primitive Pillsbury Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.Nf3 cxd4 6.Qxd4

B12

Prins Attack, Caro-Kann

1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4

D97

Prins Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6

A03

Prokofiev Gambit, Bird

1.f4 d5 2.e4 dxe4 3.d3

C47

Provincial Opening, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3 d6 5.h3

C57

Prussian Game; Knight Attack, Two Knights; C57

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5

A49

Przepiorka Variation; A49

1.d4 Nf6 2.Nf3 g6 3.g3

B06

Pseudo-Austrian Attack

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4

A46

Pseudo-Benko Gambit

1.d4 Nf6 2.Nf3 c5 3.d5 b5

D02

Pseudo-Catalan

1.d4 d5 2.Nf3 Nf6 3.g3

D06

Pseudo-Chigorin, QGD

1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 Nc6

A00

Pseudo-Diemer Gambit, Dunst

1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3

A48

Pseudo-King's Indian Variation; A48

1.d4 Nf6 2.Nf3 g6

C88

Pseudo-Marshall Var, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5

D30

Pseudo-Meran; Semi-Slav, QGD

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6

A40

Pseudo-Saemisch

1.d4 g6 2.c4 Bg7 3.e4 d6 4.Be3 Nf6 5.f3

A57

Pseudo-Saemisch, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.f3

D06

Pseudo-Slav, QGD

1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 c6

B00

Pseudo-Spanish Variation

1.e4 Nc6 2.Bb5

D50

Pseudo-Tarrasch Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 

D30

Pseudo-Tarrasch, QGD

1.d4 d5 2.c4 e6 3.Nf3 c5

A41

Pterodactyl Variation, Modern

1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 c5 5.Nf3 Qa5

B06

Pterodactyl, Pirc

1.e4 g6 2.d4 Bg7 3.Nc3 c5

B20

Push Variation, Smith-Morra Gambit, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 d3

A50

Pyrenees Gambit

1.d4 Nf6 2.c4 b5

C37

Quaade; Taylor Variation, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Nc3

D06

Queen Attack, Baltic Defens, QGD

1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Qb3

B20

Queen Fianchetto Variation, Sicilian

1.e4 c5 2.b3 b6

A40

Queen Fianchetto, Queen Pawn Game

1.d4 b6

A06

Queen Pawn Defense, Zukertort; A06

1.Nf3 d5

A40

Queen Pawn Fianchetto

1.d4 g6

D00

Queen Pawn Game; Close Opening; D00

1.d4 d5

A40

Queen Pawn Opening; A40

1.d4

D25

Queen's Gambit Accepted Deferred

1.d4 d5 2.Nf3 Nf6 3.c4 dxc4

D20

Queen's Gambit Accepted; D20

1.d4 d5 2.c4 dxc4 

D02

Queen's Gambit Reversed; Krause Variation

1.d4 d5 2.Nf3 c5

D06

Queen's Gambit; Aleppo Gambit; D06

1.d4 d5 2.c4

E12

Queen's Indian Defense; E12

1.d4 Nf6 2.c4 e6 3.Nf3 b6

A50

Queen's Indian Defense; Saemisch-Indian

1.d4 Nf6 2.c4 b6

A18

Queen's Indian Formation, English

1.c4 Nf6 2.Nc3 e6 3.Nf3 b6

C30

Queen's Knight Defense, KGD

1.e4 e5 2.f4 Nc6

A84

Queen's Knight Variation, Dutch

1.d4 f5 2.c4 Nf6 3.Nc3

D31

Queen's Knight Variation, QGD; D31

1.d4 d5 2.c4 e6 3.Nc3

C00

Queen's Knight, French

1.e4 e6 2.Nc3

C40

Queen's Pawn Counter-Gambit; Elephant Gambit

1.e4 e5 2.Nf3 d5

C25

Quelle Gambit, Vienna

1.e4 e5 2.Nc3 Nc6 3.f4 Bc5 4.fxe5 d6

A57

Quiet Line, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nd2

A28

Quiet Line, English

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3

E15

Quiet Line, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3

B28

Quiet System, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.d3

B08

Quiet System, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2

D30

Quiet Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2

D11

Quiet Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3

B27

Quinteros Variation, Sicilian

1.e4 c5 2.Nf3 Qc7

C20

Radisch Gambit

1.e4 e5 2.d3 Nf6 3.f4 Bc5

E40

Ragozin Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6 5.Nf3 O-O 6.Bd3 d5 7.O-O dxc4

E20

Ragozin Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 d5

E51

Ragozin Variation, Nimzo-Indian; E51

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5

D38

Ragozin Variation, QGD; D38

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4

A42

Randspringer Variation

1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 f5

C48

Ranken Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 a6 5.Bxc6

A80

Raphael Variation, Dutch

1.d4 f5 2.Nc3

A45

Raptor Variation, Trompowsky

1.d4 Nf6 2.Bg5 Ne4 3.h4

C10

Rasa-Studier Gambit, French

1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Be3

D00

Rasa-Studier Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.Be3

D00

Rasmussen Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nge2

D60

Rauzer Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qb3

C98

Rauzer Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6 13.dxe5 dxe5 14.a4

B63

Rauzer Variation, Sicilian; B63

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2

A00

Regan Variation

1.g3 d5 2.Bg2 e5 3.d4

B14

Reifir-Spielmann Line, Caro-Kann

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6

C41

Rellstab Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Qd5

C33

Requena Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nc3 Qh4+

D83

Reshevsky Gambit, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Qa5

E46

Reshevsky Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2

E46

Reshevsky Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2

D36

Reshevsky Variation, QGD; D36

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2

C32

Reti (Charousek) Variation, KGD

1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 

C00

Reti (Horwitz) Variation, French

1.e4 e6 2.b3

A09

Reti Gambit Accepted

1.Nf3 d5 2.c4 dxc4

A09

Reti Polonaise

1.Nf3 d5 2.c4 d4 3.b4

B28

Reti System, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.g3

D34

Reti Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.dxc5 Bxc5 10.Na4

B41

Reti Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4

A09

Reti; Landstrasser G; Wolf G; A09

1.Nf3 d5 2.c4 

A04

Reti; Zukertort; A04

1.Nf3 

C00

Reti-Spielmann Attack, French

1.e4 e6 2.g3

B11

Retreat Line, Mindeno Variation, Caro-Kann

1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bh5

C60

Retreat Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nc8

B32

Retreat Variation, Sicilian

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nf3

B02

Retreat; Brooklyn Variation, Alekhine

1.e4 Nf6 2.e5 Ng8

C00

Reuter Gambit, French

1.e4 e6 2.f4 d5 3.Nf3 dxe4 4.Ng5

A00

Reversed Alekhine

1.g3 e5 2.Nf3

A45

Reversed Chigorin Defense

1.d4 Nf6 2.Nc3 c5

A25

Reversed Closed Sicilian, English; A25

1.c4 e5 2.Nc3 Nc6

A23

Reversed Dragon, English

1.c4 e5 2.Nc3 Nf6 3.g3 d5

A06

Reversed Mexican Defense, Reti

1.Nf3 d5 2.Nc3

A00

Reversed Nimzovich

1.Nc3 e5  

A00

Reversed Norwegian Defense

1.g3 e5 2.Nf3 e4 3.Nh4

C00

Reversed Philidor, French

1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 Nc6 5.Be2

A00

Reversed Rat

1.d3 e5

A00

Reversed Scaninavian, Dunst

1.Nc3 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qa4

A21

Reversed Sicilian, English; A21

1.c4 e5 2.Nc3

C27

Reversed Spanish, Vienna

1.e4 e5 2.Nc3 Nf6 3.Bc4 Bb4

D48

Reynolds Variation, QGD; D48

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6

D48

Reynolds Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 d5

C39

Rice Gambit Accepted, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-O Bxe5

C39

Rice Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-O

C52

Richardson Attack, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O Nf6 7.d4 O-O 8.Nxe5

B00

Richter Gambit, Nimzovich Defense

1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Nb8 5.f3

B01

Richter Variation, Center Counter

1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 g6

C73

Richter Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4

C80

Richter Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.d5

D01

Richter Variation, Veresov

1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.f3

A00

Richter-Grob Gambit

1.g4 d5 2.Bg2 c6 3.c4 dxc4 4.b3

B60

Richter-Rauzer Variation, Sicilian; B60

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5

D01

Richter-Veresov Opening; D01

1.d4 d5 2.Nc3 Nf6 3.Bg5

B00

Riemann Defense, Nimzovich Defense

1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.f4 Nc6

C80

Riga Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 exd4

A01

Ringelbach Gambit, Larsen

1.b3 e5 2.Bb2 f5 3.e4

C67

Rio de Janeiro Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7

C67

Rio Gambit Accepted, Ruy Lopez; C67

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4

D00

Ritter Defense, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 b6

E16

Riumin Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7

B20

Rivadavia Gambit, Sicilian

1.e4 c5 2.d4 cxd4 3.c3

C39

Riviere Variation, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Nxg4 d5

B28

Robatsch Line, Sicilian

1.e4 c5 2.Nf3 a6 3.c4 d6

A13

Romanishin Gambit, English

1.c4 e6 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5

A28

Romanishin Variation, English

1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 Bxc3

A15

Romanishin Variation, English

1.c4 Nf6 2.Nf3 e6 3.g3 a6

E20

Romanishin Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2

E35

Romanishin Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5

C95

Romanishin Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nbd2 Bb7 12.Bc2 Re8 13.Nf1 Bf8 14.Bg5

C45

Romanishin Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb4+

E23

Romanovsky Gambit, Nimzo-Indian; E23

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6

E25

Romanovsky Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5 f5

C87

Romanovsky Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 O-O 8.d4 Bd7 9.Nbd2 exd4 10.cxd4 Nb4

C68

Romanovsky Variation, Ruy Lopez Exchange

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3 f6 6.d3

A00

Romford Counter-Gambit, Grob

1.g4 d5 2.Bg2 Bxg4 3.c4 d4

D46

Romi Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bb4

B07

Roscher Gambit, Pirc

1.e4 d6 2.d4 Nf6 3.Nf3

C88

Rosen Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.d4

D21

Rosenthal Variation, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 e6

C67

Rosenthal Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 a6

C46

Rosenthal Variation, Three Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 g6 4.d4 exd4 5.Nd5

C39

Rosenthal; Stockwhip Var, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Qe7

C50

Rosentreter Gambit, Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d4

C37

Rosentreter Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4

C37

Rosentreter-Testa Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 g4 5.Bxf4

C21

Ross Gambit, Center

1.e4 e5 2.d4 exd4 3.Bd3

A04

Ross Gambit, Zukertort

1.Nf3 e5

B30

Rossolimo (Nezmetdinov) Variation, Sicilian; B30

1.e4 c5 2.Nf3 Nc6 3.Bb5

A40

Rossolimo Variation

1.d4 g6 2.c4 Bg7 3.e4 d6 4.Nf3 Bg4

B06

Rossolimo Variation, Modern Defense

1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c4 Bg4

C60

Rotary-Albany Gambit, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 b6

D12

Rotterdam Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 

C50

Rousseau Gambit

1.e4 e5 2.Nf3 Nc6 3.Bc4 f5

E83

Ruban Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 Rb8

D05

Rubinstein Attack, Colle

1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 c5 5.b3

D64

Rubinstein Attack, Orthodox Defense, QGD;  D64

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2

C30

Rubinstein Countergambit, KGD

1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 f5

C48

Rubinstein Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4

E10

Rubinstein Variation, Blumenfeld

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.e4

A52

Rubinstein Variation, Budapest

1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4

B13

Rubinstein Variation, Caro-Kann

1.e4 c6 2.d4 d5 3.exd5 cxd3 4.Bd3 Nc6 5.c3 Nf6 6.Bf4

A84

Rubinstein Variation, Dutch

1.d4 f5 2.c4 e6 3.Nc3

C10

Rubinstein Variation, French

1.e4 e6 2.d4 d5 3.Nc3 dxe4

C14

Rubinstein Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qd2

C39

Rubinstein Variation, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.d4

E40

Rubinstein Variation, Nimzo-Indian; E40

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

E42

Rubinstein Variation, Nimzo-Indian; E42

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2

D61

Rubinstein Variation, Orthodox Defense, QGD; D61

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qc2

D20

Rubinstein Variation, QGA 

1.d4 d5 2.c4 dxc4 3.e4 c5

D27

Rubinstein Variation, QGA; D27

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6

D63

Rubinstein Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6

E16

Rubinstein Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Nh4

A34

Rubinstein Variation, Symmetrical English

1.c4 c5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7

D45

Rubinstein; anti-Meran

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Ne5

D34

Rubinstein; Normal Position, QGD

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O

C02

Ruisdonk Gambit, French

1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 cxd4 5.Bd3

C79

Russian Defense, Ruy Lopez; C79; Lasker Defense

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6

D27

Russian Gambit, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.e4

C42

Russian Three Knights Var, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nc3

D96

Russian Variation, Grunfeld; D96

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3

C60

Ruy Lopez; Spanish Opening; C60

1.e4 e5 2.Nf3 Nc6 3.Bb5

A04

Rydel-Bloodgood Gambit

1.Nf3 f5 2.e4 exf4 3.Ne5

D00

Ryder Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3

D20

Saduleto Variation, QGA; Central Variation, QGA

1.d4 d5 2.c4 dxc4 3.e4

B02

Saemisch Attack, Alekhine

1.e4 Nf6 2.e5 Nd5 3.Nc3

E51

Saemisch Deferred, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.a3

E80

Saemisch Variation, KID; E80

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3

E24

Saemisch Variation, Nimzo-Indian; E24

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3

E26

Saemisch Variation, Nimzo-Indian; E26

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3

D35

Saemisch Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Nf3 Nbd7 6.Bf4

E15

Saemisch Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5

D06

Salvio Countergambit, QGD

1.d4 d5 2.c4 c5 3.dxc5 d4

C37

Salvio Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 

B31

San Francisco Gambit, Sicilian

1.e4 c5 2.Nf3 Nc6 3.Bb5 Na5 4.b4

B00

San Jorge Variation

1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 d6 5.O-O g6 6.c3 Bg7

B00

San Jorge Variation

1.e4 a6 2.d4 e6

E37

San Remo Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 Nc6 8.e3 e5

E23

San Remo Variation, Nimzo-Indian; Stahlberg Variation

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxc5

D41

San Sebastian Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+

B00

Sanky-Georg Gambit, St George

1.e4 a6 2.d4 e6 3.c4 b5

C37

Santa Maria Defense, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5  Qh4+ 6.Kf1 Nf6

B20

Santasiere Wing Gambit, Sicilian

1.e4 c5 2.b4 cxb4 3.c4

A06

Santasiere's Folly, Reti

1.Nf3 d5 2.b4

E60

Santassiere Variation, KID

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.b4

A00

Saragossa; Hempel's Opening

1.c3

D00

Sarratt Attack

1.d4 d5 2.Bf4

C37

Sarratt Defense, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6

C60

Sawyer's Gambit, Ruy Lopez; Spanish Countergambit

1.e4 e5 2.Nf3 Nc6 3.Bb5 d5

B20

Scandanavian Formation, Smith-Morra, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 d5

B02

Scandanavian Variation, Alekhine

1.e4 Nf6 2.Nc3 d5

B00

Scandanavian Variation, Nimzovich Defense

1.e4 Nc6 2.d4 d5

C36

Scandinavian Variation, KGA; Modern Defense, KGA; C36

1.e4 e5 2.f4 exf4 3.Nf3 d5

C34

Schallop Defense, KGA

1.e4 e5 2.f4 exf4 3.Nf3 Nf6

D12

Schallopp Defense, Slav; D12

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5

D32

Schara-Hennig; Duisburg Gambit, QGD

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4

B80

Scheveingen Variation, Sicilian; B80

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6

B20

Scheveningen Formation, Smith-Morra Accepted

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6

B83

Scheveningen Variation, Sicilian; B83

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 

A00

Schiffler-Sokolsky; Tartakower Gambit

1.b4 e5 2.Bb2 f6 3.e4 Bxb4

B01

Schiller-Pytel Variation, Center Counter

1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 c6

C21

Schlechter Defense, Center

1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 d5

E52

Schlechter Defense, Nimzo-Indian; E52

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 b6

C80

Schlechter Defense, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.a4 Nxd4

A02

Schlechter Gambit, Bird

1.f4 e5 2.fxe5 Nc6

C01

Schlechter Variation, French

1.e4 e6 2.d4 d5 3.Bd3

D80

Schlechter Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6

D80

Schlechter Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 c6

C41

Schlechter Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.Nc3

B08

Schlechter Variation, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.h3

C86

Schlechter Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d5

D15

Schlechter Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 g6

C46

Schlechter Variation, Three Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Bb4 4.Nd5 Nf6

A43

Schlenker Defense, Benoni

1.d4 c5 2.dxc5 Na6

C70

Schliemann Defense Deferred, Ruy

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5

C63

Schliemann; Jaenisch Var, Ruy Lopez; C63

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5

C47

Schmid Gambit, Four Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 Nxe4

B04

Schmid Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nb6

A43

Schmid Variation, Benoni

1.d4 c5 2.d5 d6 3.Nc3 g6

C44

Schmidt Attack, Ponziani

1.e4 e5 2.Nf3 Nc6 3.c3 f5 4.d4 d6 5.d5

C45

Schmidt Var; Scotch Four Knights

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3

A00

Schneider Gambit

1.h4 g5

A47

Schnepper Gambit

1.d4 Nf6 2.Nf3 b6 3.c3 e5

C63

Schoenemann Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d4

B23

Schofman Variation, Sicilian

1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5

C30

Schubert Variation, KGD

1.e4 e5 2.f4 Qf6 3.Nc3 Qxf4 4.d4

A00

Schuhler Gambit, Polish

1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4

C34

Schulder Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 d6 4.b4

C52

Schulen Defense, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O b5

C38

Schultz Variation, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.Qd3

A10

Schulz Gambit, English

1.c4 d5 2.cxd5 Nf6

C33

Schurig Gambit, KGA

1.e4 e5 2.f4 exf4 3.Bb5

D00

Schuttler Defense, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nbd7

C15

Schwarz's Line, French

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 Ne7 5.Nb1

C21

Scippler Gambit, Center

1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3 dxc3 5.Bc4

B10

Scorpion-Horus Gambit, Caro-Kann

1.e4 c6 2.Nc3 d5 3.d3 dxe4 4.Bg5

C56

Scotch Gambit

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O

C44

Scotch Gambit

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4

C44

Scotch Game

1.e4 e5 2.Nf3 Nc6 3.d4

E00

Seirawan Attack

1.d4 Nf6 2.c4 e6 3.Bg5

B19

Seirawan Variation, Caro-Kann

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.e5 Bh7 9.Bd3 Bxd3 10.Qxd3

E73

Semi-Averbakh System, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Be3

A81

Semi-Leningrad Variation, Dutch

1.d4 f5 2.g3 Nf6 3.Bg2 g6

D31

Semi-Slav Defense

1.d4 d5 2.c4 e6 3.Nc3 c6 

D44

Semi-Slav Defense Accepted; D44

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4

D40

Semi-Tarrasch Variation, QGD; D40

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5

D30

Semmering Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 Nbd7 6.Bd3 c5

C30

Senechaud Counter-Gambit, KGD

1.e4 e5 2.f4 Bc5 3.Nf3 g5

C40

Senechaud Gambit, Latvian

1.e4 e5 2.Nf3 f5 3.b4

A80

Seneschaud Gambit, Dutch

1.d4 f5 2.Bf4 e6 3.g4

A40

Seneschaud Variation, Dutch

1.d4 e6 2.Bf4 f5 3.g4

D87

Seville Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3

D45

Shabalov Attack, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.g4

C78

Shannon Gambit, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.Ng5 d5

C07

Shaposhnikov Gambit, French

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Nf6

D17

Sharp Line, Wiesbaden Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 7.f3 Bb4 8.e4

C41

Sharp Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 Nb6

D00

Shaviliuk Gambit, QP

1.d4 d5 2.Nc3 e5

E42

Sherbakov Attack, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.c5

B89

Sherbakov Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Bb3 O-O 9.O-O Na5 10.f4 b6

B22

Sherzer Variation, Sicilian

1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 e6 5.Nf3 Nc6

C50

Shilling (Kostic) Gambit, Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4

A15

Shirazi Shove

1.c4 Nf6 2.g3 h5

E21

Shocron Gambit, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 b5

A00

Short Spike, Grob

1.g4 d5 2.Bg2 c6 3.h3

B12

Short Variation, Caro-Kann

1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3

D24

Showalter Variation, QGA; D24

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3

D00

Shropshire Defense

1.d4 d5 2.Nc3 h5

D00

Siberian Attack

1.d4 d5 2.Qd3 Nc6 3.Nc3

B20

Sicilian Center Game

1.e4 c5 2.d4 cxd4

B20

Sicilian Defense; B20

1.e4 c5

B27

Sicilian Fred

1.e4 c5 2.Nf3 g6 3.d4 f5

A08

Sicilian Vartiation, KIA; A08

1.Nf3 d5 2.g3 c5

A02

Siegener Gambit, Bird

1.f4 e5 2.d4 exd4 3.Nf3 c5 4.c3

C74

Siesta Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5

C37

Silberschmidt Variation, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5  Qh4+ 6.Kf1 Nh6

D97

Simagin (Byrne) Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Nc6

D86

Simagin Improved Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 Nc6

B96

Simagin Line, Najdorf Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5 8.e5 dxe5 9.fxe5 Qc7 10.Qe2

E60

Simagin Variation

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bg4

D86

Simagin Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 b6 9.h4 Ba6

E62

Simagin Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bg4

E46

Simagin Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bd6

E46

Simagin Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2 d5 6.a3 Bd6

C95

Simagin Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nh4

E77

Six Pawns Attack, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6

E76

Six Pawns Attack, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 c5 6.d5 O-O 7.Be2 e6 8.dxe6 fxe6 9.g4 Nc6 10.h4

C80

Skipworth Gambit, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Re1 d5

D11

Slav Bishop's Game

1.d4 d5 2.c4 c6 3.Nf3 Bf5

D10

Slav Defense; Czech Defense, QGD; D10

1.d4 d5 2.c4 c6

D90

Slav Fianchetto

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Nf6 5.Nc3 g6

D21

Slav Gambit, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 b5

D10

Slav Pawn Game

1.d4 d5 2.c4 c6 3.e3

A84

Slav Stonewall, Dutch

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5

A00

Sleipner Countergambit, Dunst

1.Nc3 d5 2.f4 d4 3.Ne4 e5 4.Nf3

A00

Sleipner Gambit, Dunst

1.Nc3 d5 2.e3 e5 3.d4 Bb4

B20

Slow Sicilian

1.e4 c5 2.Be2

C52

Slow Variation, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O

B07

Small Center Defense

1.e4 d6 2.d4 e6

B06

Small Center Variation, Pirc

1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 e6

B00

Smith Gambit, Owen Defense

1.e4 b6 2.d4 Bb7 3.Nf3

B20

Smith-Morra Accepted, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 dxc3

B28

Smith-Morra Line, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.c3

B20

Smith-Morra; Fleissig Gambit, Sic

1.e4 c5 2.d4 cxd4 3.c3

A17

Smyslov Defense, English

1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nxc3

B17

Smyslov Variation, Caro-Kann

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6

D29

Smyslov Variation, Classical Defense, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7 9.Rd1 Nbd7 10.Nc3 Bd6

A21

Smyslov Variation, English

1.c4 e5 2.Nc3 d6 3.Nf3 Bg4

D80

Smyslov Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bg4

D98

Smyslov Variation, Grunfeld; D98

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4

E61

Smyslov Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Bg5

E61

Smyslov Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Bg5

E48

Smyslov Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Qe7

E55

Smyslov Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Qe7

D25

Smyslov Variation, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 g6

C93

Smyslov Variation, Ruy Lopez; C93

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 h6

D16

Smyslov Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Na6

A05

Smyslov Variation, Zukertort

1.Nf3 Nf6 2.g3 g6 3.b4

B00

Snagkeouss Defense

1.e4 a5 2.d4 Nc6

A43

Snail Variation, Benoni

1.d4 c5 2.d5 Na6

A61

Snake Variation, Benoni

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 Bd6

D00

Sneiders Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Qh5

B20

Snyder Variation, Sicilian

1.e4 c5 2.b3

C25

Soerensen Defense, Vienna

1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 g5

C37

Soerensen Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Nc3

E97

Sokolov's Line, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4 Nh5 10.Re1

E09

Sokolsky Variation, Catalan

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2 b6 8.Nbd2 b6 9.b3 a5 10.Bb2 Ba6

C52

Sokolsky Variation, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Bg5

D89

Sokolsky Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5 9.O-O Nc6 10.Be3 cxd4 11.cxd4 Bg4 12.f3 Na5 13.Bd3 Be6 14.d5

C41

Sokolsky Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Nbd2

D00

Soller Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 Nf6 5.Bc4

A40

Soller Gambit Deferred

1.d4 e5 2.dxe5 Nc6 3.Nf3 f6

D00

Soller; Lemberger Var, BDG; Diemer Attack

1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Be3

A40

Soller; Purchas Gambit

1.d4 e5 2.dxe5 f6

D00

Soller; Vienna Var, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bc4

C30

Soller-Zilbermints Gambit, KGD

1.e4 e5 2.f4 f6 3.fxe5 Nc6

D20

Somov Gambit, QGA

1.d4 d5 2.c4 dxc4 3.e4 e5 4.Bxc4

C21

Sorensen Defense, Center

1.e4 e5 2.d4 exd4 3.c3 d5

C37

Sorensen Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5

A57

Sosonko Variation, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.a4

B77

Sosonko Variation, Sicilian Dragon

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Nd7

D16

Soultanbeieff Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6

C63

Soviet Youth Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nd4 5.O-O

B20

Sozin Formation, Smith-Morra Accepted, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 d6 7.O-O a6 8.Qe2 b5

D49

Sozin Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5

B57

Sozin; Velimirovic Attack, Sicilian; B57

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4

C92

Spanish Benoni, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.d5

E73

Spanish Defense, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 a6

C48

Spanish Four Knights Game; C48

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5

C44

Spanish Variation, Ponziani

1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5

C64

Spanish Wing Gambit, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.b4

A40

Spassky Gambit, Polish Defense

1.d4 b5 2.e4 Bb7 3.Bxb5

E14

Spassky System, QID; E14

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3

E60

Spassky Variation

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bf5

D87

Spassky Variation, Grunfeld; D87

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5

D34

Spassky Variation, Tarrasch

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.Bg5 cxd4 10.Nxd4

A05

Spassky Variation, Zukertort

1.Nf3 Nf6 2.g3 b5

A04

Speelsmet Gambit, Zukertort

1.Nf3 c5 2.d4 cxd4 3.e3

D00

Sperling Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.d5

C24

Spielmann Attack, Bishop

1.e4 e5 2.Bc4 Nf6 3.d3 Bc5 4.Nc3

A32

Spielmann Defense, Symmetrical English; A32

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6

A80

Spielmann Gambit, Dutch

1.d4 f5 2.Nc3 Nf6 3.g4

B02

Spielmann Variation, Alekhine

1.e4 Nf6 2.Nc3 d5 3.e5 Nfd7 4.e6

E10

Spielmann Variation, Blumenfeld

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5 exd5 6.cxd5 h6

C14

Spielmann Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 O-O

E22

Spielmann Variation, Nimzo-Indian; E22

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3

B56

Spielmann Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Nde2

A46

Spielmann-Indian

1.d4 Nf6 2.Nf3 c5

A00

Spike Deferred

1.g4 g6 2.d3

A00

Spike Deferred; Myers Spike Attack

1.d3 g6 2.g4

A00

Spike Lee Gambit

1.h3 h5 2.g4

A01

Spike Variation, Larsen

1.b3 Nf6 2.Bb2 g6 3.g4

A00

Spike, Grob

1.g4 d5 2.Bg2 c6 3.g5

B00

St George; Birmingham; Baker

1.e4 a6 

A40

St George's Gambit

1.d4 a6 2.c4 b5 3.e4 e6 4.cxb5 axb5

C82

St Petersburg Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Bc5 10.Nbd2

A00

St. George Defense, Dunst

1.Nc3 a6

E43

St. Petersburg Variation, Nimzo-Indian; E43

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6

C42

Stafford Gambit, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nc6

E23

Stahlberg Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxc5 8.Qc2 f5 9.g3

E23

Stahlberg Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2 8.Nxd2 O-O 9.O-O-O

D49

Stahlberg Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 12.Nxe5 axb5

C27

Stanley Variation, Vienna; C27

1.e4 e5 2.Nc3 Nf6 3.Bc4

A43

Staunton Defense; Benoni C-G; A43

1.d4 c5

A82

Staunton Gambit Accepted, Dutch

1.d4 f5 2.e4 fxe4

A82

Staunton Gambit, Dutch; A82

1.d4 f5 2.e4 

C32

Staunton Line, KGD; C32

1.e4 e5 2.f4 d5 3.exd5 e4

C42

Staunton Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 c6

B20

Staunton-Cochrane Variation, Sicilian

1.e4 c5 2.c4 

B10

Stein Attack, Caro-Kann

1.e4 c6 2.d3 d5 3.Nd2 g6 4.g3 Bg7 5.Bg2 e5 6.Ngf3 Ne7 7.O-O O-O 8.b4

A16

Stein Attack, English

1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.Qa4+

E92

Stein Defense, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 a5

C23

Stein Gambit, Bishop

1.e4 e5 2.Bc4 Bc5 3.f4

A00

Steinbok Gambit, Kadas

1.h4 f5 2.e4 fxe4 3.d3

E81

Steiner Attack, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Bg5

A00

Steiner Gambit, Dunst

1.Nc3 d5 2.e4 dxe4 3.Nxe4 e5 4.f4

B28

Steiner Line, Sicilian

1.e4 c5 2.Nf3 a6 3.c3 d6

B02

Steiner Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.b3

A51

Steiner Variation, Budapest

1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.Qc2

E38

Steiner Variation, Nimzo-Indian 

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 Bxc3+

E20

Steiner Variation, Nimzo-Indian; Romanishin Variation

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3

C41

Steiner Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O Be7 6.dxe5

C89

Steiner Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 e4

D16

Steiner Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bg4

C00

Steinitz Attack, French

1.e4 e6 2.e5

D00

Steinitz Countergambit, Queen Pawn Game

1.d4 d5 2.Bf4 c5

C71

Steinitz Defense Deferred; Ruy Lopez; C71

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6

C62

Steinitz Defense, Ruy Lopez; C62

1.e4 e5 2.Nf3 Nc6 3.Bb5 d6

C46

Steinitz Defense, Three Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 g6

C25

Steinitz Gambit, Vienna

1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4

C14

Steinitz Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4

C11

Steinitz Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5

C43

Steinitz Variation, Petoff; C43

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4

C44

Steinitz Variation, Ponziani

1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 f6

D26

Steinitz Variation, QGA

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O cxd4

C45

Steinitz Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3

C29

Steinitz Variation, Vienna

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.d3

C45

Steinitz; Pulling Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4

B20

Steinitz; Tartakower, Lasker-Dunne Variation, Sicilian

1.e4 c5 2.g3

D80

Stockholm Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5

A40

Stockhom Variation, Englund Gambit

1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7 4.Qd5

B22

Stoltz Attack, Sicilian

1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Bc4 Nb6 6.Bb3

D45

Stoltz Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2

D00

Stonewall Attack

1.d4 d5 2.e3 Nf6 3.Bd3 c5 4.c3

D00

Stonewall Attack, Queen Pawn Game

1.d4 d5 2.e3 Nf6 3.Bd3

D44

Stonewall Defense, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Ne4 6.Bd3 f5

A84

Stonewall Variation, Dutch

1.d4 f5 2.c4 e6 3.Nc3 Nf6 4.g3 c6 5.Bg2 d5 6.O-O Bd6

C51

Stone-Ware Defense, Evans Gambit

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bd6

C40

Strautins Gambit, Latvian

1.e4 e5 2.Nf3 f5 3.Bc4 b5

D00

Studier Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.O-O O-O 8.Qe1

D00

Studier-Rasa Gambit, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Be3

A45

Stummer Gambit

1.d4 Nf6 2.g4 Nxg4 3.e4 d6 4.Be2 Nf6 5.Nc3

A03

Sturm; Mujannah

1.f4 d5 2.c4

C43

Suchting Gambit, Petroff

1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.Bc4

D15

Suchting Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 Qb6

C90

Suetin Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.a3

C90

Suetin Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 9.a3

C59

Suhle Defense, Two Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6

B06

Suttles Variation, Modern Defense

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6

C01

Svenius Variation, French

1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nc3 Nf6 5.Bg5

C21

Svenonius Defense, Center

1.e4 e5 2.d4 exd4 3.c3 Ne7

C49

Svenonius Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 Bxc3 7.bxc3 d5

C10

Svenonius Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.exd5

C30

Svenonius Variation, KGD

1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.Nc3 Nf6 5.Bc4 Nc6 6.d3 Bg4

B33

Sveshnikov Variation, Sicilian

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5

B07

Sveshnikov-Jansa Attack, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.h3

C18

Swiss (Retreat) Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5

B42

Swiss Cheese Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6

A02

Swiss Gambit, Bird

1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4

C11

Swiss Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bd3

A46

Swiss; Wagner Gambit

1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e4

A30

Symmetrical Defense, English; A30

1.c4 c5 

D14

Symmetrical Line, Slav; D14

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5

C49

Symmetrical Variation, 4 Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6

A01

Symmetrical Variation, Larsen

1.b3 b6

C43

Symmetrical Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.d4 d5

D02

Symmetrical Variation, QP

1.d4 d5 2.Nf3 Nf6

A36

Symmetrical Variation, Symmetrical English

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7

D32

Symmetrical Variation, Tarrasch

1.d4 d5 2.c4 e6 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6

D97

Szabo (Boleslavsky) Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 c6

E60

Szabo Variation

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O e5

B44

Szen Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5

B20

Taimanov Formation, Smith-Morra Accepted, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Bc4 a6 6.Nf3 Ne7

E17

Taimanov Gambit, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nd4

B28

Taimanov Line, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e5

A67

Taimanov Variation, Benoni; A67

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5

A25

Taimanov Variation, English

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7

E40

Taimanov Variation, Nimzo-Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6

B46

Taimanov Variation, Sicilian

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 Nge7

B44

Taimanov; Bastrikov, Paulsen Variation, Sicilian; B44

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6

C43

Tal Gambit, Petroff

1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Bb5

B21

Tal Gambit, Sicilian

1.e4 c5 2.f4 d5 3.exd5 Nf6

B12

Tal Variation, Caro-Kann

1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4

A60

Tal Variation, Modern Variation, Benoni; A60

1.d4 Nf6 2.c4 c5 3.d5 e6

B82

Tal Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Nc6 7.Be3 Be7 8.Qf3

A43

Tamarkin Countergambit, Benoni

1.d4 c5 2.Nf3 cxd4 3.b4 e5

B15

Tarrasch (Alekhine) Gambit, Caro

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Bd3

E06

Tarrasch Defense, Catalan

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 c5 5.Nf3 Nc6

D32

Tarrasch Defense, QGD; D32

1.d4 d5 2.c4 e6 3.Nc3 c5

D32

Tarrasch Gambit, QGD

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.dxc5 d4 6.Na4 b5

C66

Tarrasch Trap, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Re1 O-O

C14

Tarrasch Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Bd3

C03

Tarrasch Variation, French; C03

1.e4 e6 2.d4 d5 3.Nd2

C42

Tarrasch Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6 7.O-O O-O 8.c4 Bg4

C80

Tarrasch; Open Variation, Ruy Lopez; C80

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4

C52

Tartakower Attack, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Qb3

D08

Tartakower Defense, QGD

1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 c5

D06

Tartakower Gambit, QGD

1.d4 d5 2.c4 Nc6 3.Nc3 e5

C60

Tartakower Gambit, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.d4 exd4 5.Nxd4 g6 6.Nc3 Bg7 7.Be3 O-O 8.Qd2 d5

B74

Tartakower Line, Sicilian Dragon

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.Nb3 Be6 10.f4 Qc8

B15

Tartakower Variation, Caro

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6

A82

Tartakower Variation, Dutch

1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4

C12

Tartakower Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Nfd7

C14

Tartakower Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ne4

C50

Tartakower Variation, Hungarian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 4.d4 exd4 5.c3 Nf6 6.e4 Ne4

D58

Tartakower Variation, QGD; D58

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6

C80

Tartakower Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Qe2

C63

Tartakower Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Nf6

C45

Tartakower Variation, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6 6.Nd2

B53

Tartakower Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.c3

A53

Tartakower-Indian

1.d4 Nf6 2.c4 d6 3.Nf3 Bg4

C34

Tashkent Attack, KGA

1.e4 e5 2.f4 exf4 3.Nf3 Nf6 4.e5 Nh5 5.g4

A80

Tate Gambit, Dutch

1.d4 f5 2.g4 fxg4 3.e4 d5 4.Nc3

D00

Tautvaisis Defense, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Nc6

C44

Taylor Opening; Inverted Hungarian

1.e4 e5 2.Nf3 Nc6 3.Be2

D00

Teichmann Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4

C14

Teichmann Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 f6

D56

Teichmann Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.Qc2

D00

Tejler Attack, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bf4

D00

Tejler Gambit, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Qxd4 6.Be3 Qg4 7.Qf2 Ne4 8.Nxe4 Qxe4 9.O-O-O Nc6 10.Bd3

A06

Tennison G; Lemberg G; Abonyi G

1.Nf3 d5 2.e4

C54

Therkatz-Herzog, Italian

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Bxc3 9.d5 Bf6 10.Re1 Ne7

C39

Thorold Attack, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.d4

C23

Thorold Gambit

1.e4 e5 2.Bc4 b5 3.Bxb5 f5

C46

Three Knights Opening; C46

1.e4 e5 2.Nf3 Nc6 3.Nc3

A27

Three Knights System, English; A27

1.c4 e5 2.Nc3 Nc6 3.Nf3

D90

Three Knights Variation, Grunfeld; D90

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3

E21

Three Knights Variation, Nimzo-Indian; E21

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3

D37

Three Knights Variation, QGD; D37

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3

D15

Three Knights Variation, Slav; D15

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3

C28

Three Knights Variation, Vienna; C28

1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6

B00

Three Pawn Attack, St George

1.e4 a6 2.d4 e6 3.c4

B06

Three Pawns Attack

1.e4 g6 2.d4 Bg7 3.f4

A40

Thuring Gambit; Hartlaub-Charlick Gambit

1.d4 e5 2.dxe5 d6

B00

Tiers Counter-Gambit

1.e4 f5

E15

Timman's Line, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qb3

E18

Tiviakov Defense, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Na6

B17

Tiviakov-Fischer Attack, Caro-Kann

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Nxf6+ Nxf6

D31

Tolush Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4 Qxe4+8.Be2 c5 9.Bxc5 Qxg2

B01

Tomalty Gambit, Center Counter

1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nf6 5.Nc3 c5

A47

Torre Attack

1.d4 Nf6 2.Nf3 b6 3.Bg5

A46

Torre Attack

1.d4 Nf6 2.Nf3 e6 3.Bg5

D03

Torre Attack, QP; D03

1.d4 d5 2.Nf3 Nf6 3.Bg5

C20

Tortoise Opening

1.e4 e5 2.Bd3

B23

Traditional Closed Sicilian

1.e4 c5 2.Nc3 Nc6

D26

Traditional System QGA; D26

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6

C38

Traditional Variation, KGA; C38

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7

D30

Traditional Variation, QGD

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5

E17

Traditional Variation, QID; E17

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7

C88

Trajkovic Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7

A40

Transpositional Variation, Keres Defense

1.d4 e6 2.c4 Bb4+ 3.Nc3

C57

Traxler; Wilkes-Barre Var, 2 Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5

C57

Trencianske-Teplice Gambit, Two Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.Bxf7+ Ke7 6.d4

C77

Treybel; Flohr; Exchange Var Deferred

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6

B03

Trifunovic Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 Bf5

C43

Trifunovic Variation, Petroff

1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.O-O O-O 7.c4 Bxe5

C67

Trifunovic Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 d5

D14

Trifunovic Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 7.e3 e6 8.Qb3 Bb4

A21

Troger Variation, English

1.c4 e5 2.Nc3 d6 3.g3 Be6 4.Bg2 Nc6

A25

Troger Variation, English

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Be6

A45

Trompowsky; Opocensky; Ruth Opening

1.d4 Nf6 2.Bg5

A00

Tubingen Gambit, Dunst

1.Nc3 Nf6 2.g4

C33

Tumbleweed; King's Own, KGA

1.e4 e5 2.f4 exf4 3.Kf2

C00

Two Knight Variation, French

1.e4 e6 2.Nc3 d5 3.Nf3

B06

Two Knight Variation, Modern Defense

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3

B11

Two Knights Attack, Caro Kann

1.e4 c6 2.Nc3 d5 3.Nf3

D15

Two Knights Attack, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4

C55

Two Knights Defense; C55

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6

A37

Two Knights Line, Symmetrical English; A37

1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3

B08

Two Knights System, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 

D01

Two Knights System, Veresov

1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3

B10

Two Knights Variation, Caro

1.e4 c6 2.Nf3 d5 3.Nc3

A31

Two Knights Variation, English

1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4

A22

Two Knights Variation, English; A22

1.c4 e5 2.Nc3 Nf6

C00

Two Knights Variation, French

1.e4 e6 2.Nf3 d5 3.Nc3

A54

Two Knights Variation, Old Indian; A54

1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3

A35

Two Knights Variation, Symmetrical English; A35

1.c4 c5 2.Nc3 Nc6  

D32

Two Knights Variation, Tarrasch

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3

A00

Twyble Attack, Dunst

1.Nc3 c5 2.Rb1

A45

Ueberlinger Gambit

1.d4 Nf6 2.g3 e5

A61

Uhlmann Variation, Benoni

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bg5

D50

Uhlmann Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Nf3 h6 6.Bh4 O-O 7.Rc1 dxc4

E62

Uhlmann-Szabo System, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O e5

E94

Ukranian Defense, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O a5

A53

Ukranian Variation

1.d4 Nf6 2.c4 d6 3.Nc3 e5

D79

Ultra-delayed Exchange Variation, Neo-Grunfeld

1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 7.cxd5 cxd5

C57

Ulvestad Variation, 2 Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5

C51

Ulvestad Variation, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bc5 6.d4 exd4 7.O-O d6 8.cxd4 Bb6 9.d5 Na5 10.Bb2

B12

Ulysses Gambit, Caro

1.e4 c6 2.d4 d5 3.Nf3 dxe4 4.Ng5

B09

Unzicker Attack, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.e5

C42

Urosov Gambit, Petroff

1.e4 e5 2.Nf3 Nf6 3.Bc4

C39

Urusov Attack, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+ d5 8.Bxd5+ Ke8 9.d4

C43

Urusov Gambit, Petroff

1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4 exd4 4.Bc4

C24

Urusov; Ouroussoff; Keidansky G

1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3

B12

Van der Wiel Attack, Caro-Kann

1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3

A50

Van Geet; Kevitz; Trajkovic; Mexican

1.d4 Nf6 2.c4 Nc6

A00

Van Kruijk Gambit

1.g3 h5 2.Nf3 h4

A00

Van't Kruijs Opening

1.e3 e5

B00

Vehre Variation, Nimzovich Defense

1.e4 Nc6 2.d4 d5 3.Nc3 Nf6

B89

Velimirovic Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Qe2

A00

Venezolana

1.d3 c5 2.Nc3 Nc6 3.g3

B55

Venice Attack, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5+

B56

Venice Attack, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Bb5+

B28

Venice System, Sicilian

1.e4 c5 2.Nf3 a6 3.c3

D01

Veresov Variation, QP

1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.Bxf6

D20

Versov; Betbeder; Schwartz Defense, QGA

1.d4 d5 2.c4 dxc4 3.e4 f5

C25

Vienna Gambit

1.e4 e5 2.Nc3 Nc6 3.f4

C29

Vienna Gambit, Vienna; C29

1.e4 e5 2.Nc3 Nf6 3.f4

C24

Vienna Hybrid, Bishop

1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3

D00

Vienna Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6

D80

Vienna Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3

D30

Vienna Variation, QGD 

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Bb4+

D39

Vienna Variation, QGD; D39

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Bg5 dxc4

D44

Vienna Variation, Semi-Slav

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 dxc4

C25

Vienna; Hamppe Opening; C25

1.e4 e5 2.Nc3 

B23

Vinken System, Sicilian; Grand Prix Attack

1.e4 c5 2.Nc3 Nc6 3.f4

C60

Vinogradov Var, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Qe7

C13

Vistaneckis (Nimzovich) Variation, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8

B80

Vitolins Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bb5+

E33

Vitolinsh-Adorjan Gambit, Nimzo Indian

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b5

C44

Vitzhum Attack, Scotch

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.Ng5 Nh6 6.Qh5

A45

Von Beivorseen

1.d4 Nf6 2.Nc3 c5 3.dxc5

C21

Von der Lasa Gambit

1.e4 e5 2.d4 exd4 3.Bc4

B15

Von Hennig Gambit, Caro

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Bc4

D32

Von Hennig Gambit, QGD

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Be6

D00

Von Popiel Gambit

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5

A04

Vos Gambit, Zukertort

1.Nf3 d6 2.d4 e5

C44

Vukovic Gambit, Ponziani

1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d4 Nxe4 5.d5 Bc5

A56

Vulture Defense, Benoni

1.d4 c5 2.d5 Nf6 3.c4 Ne4

A56

Vulture Variation; Der Geier

1.d4 Nf6 2.c4 c5 3.d5 Ne4

A41

Wade Defense

1.d4 d6 2.Nf3 Bg4

A04

Wade Defense

1.Nf3 d6

A10

Wade Gambit, English

1.c4 f5 2.g4

C02

Wade Variation, French

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7

D47

Wade Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7

A04

Wade-Tartakower Defense, Zukertort

1.Nf3 d6 2.e4 Bg4

D33

Wagner Variation, Tarrasch

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Bg4

A02

Wagner-Zwitersch Gambit, Bird

1.f4 f5 2.e4

C39

Walker (Urusov) Attack, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+

C23

Walker Variation, Bishop

1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6 5.d4

C20

Walkerling

1.e4 e5 2.f3 Nf6 

B03

Wall Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.d4 c5

B20

Wall Variation, Sicilian

1.e4 c5 2.d4 Nf6 3.e5

C52

Waller Attack, Evans

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O d6 8.Qb3

B00

Ware Defense

1.e4 a5

A00

Ware Gambit

1.a4 e5 2.a5 d5 3.e3 f5 4.a6

A00

Ware; Meadow Hay; Crab

1.a4

C24

Warsaw Gambit, Bishop

1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.c3

A88

Warsaw Variation, Dutch; A88

1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6

A00

Warsteiner Gambit, Dunst

1.Nc3 d5 2.f4 g5

C40

Wasp Variation

1.e4 e5 2.Nf3 d5 3.Nxe5 dxe4 4.Bc4 Qg5

C20

Wayward Queen; Danvers; Parnham

1.e4 e5 2.Qh5

C20

Weber Gambit

1.e4 e5 2.d3 d5 3.exd5 c6 4.dxc6 Nxc6

A45

Webster Gambit

1.d4 Nf6 2.f3 c5 3.d5 e6 4.e4 exd5 5.e5

A56

Weenink Variation, Benoni

1.d4 Nf6 2.c4 c5 3.dxc5 e6

D00

Weinsbach Declination, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6

C33

Weiss Defense, KGA

1.e4 e5 2.f4 exf4 3.Be2 f5 4.exf5 d6

B09

Weiss Variation, Pirc

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3

B02

Welling Variation, Alekhine

1.e4 Nf6 2.e5 Nd5 3.b3

D00

Welling Variation, Queen Pawn Game

1.d4 d5 2.Bg5 Bg4

C67

Westerinen Line, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6 6.Bxc6 dxc6 7.dxe5 Ne4

B06

Westermann Gambit

1.e4 g6 2.d4 Bg7 3.Bd2

D51

Westphalian Variation, QGD

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4 6.Nf3 c5

C20

Whale Opening

1.e4 e5 2.c4

B00

Wheeler Gambit, Nimzovich Defense

1.e4 Nc6 2.b4 Nxb4 3.c3 Nc6 4.d4

A00

Wiedenhagen-Beta Gambit

1.g3 d5 2.Nf3 g5

D17

Wiesbaden Variation, Slav

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6

D00

Wiesengren Defense, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bc5

A52

Wikstrom Gambit, Budapest

1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nbc6

B00

Wild Bull Defense

1.e4 Nh6

C35

Wild Cunningham Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+ 

A03

Williams Gambit, Bird

1.f4 d5 2.e4 dxe4 3.Nc3

B00

Williams Variation, Nimzovich

1.e4 Nc6 2.Nf3 d6

A13

Wimpy System, English

1.c4 e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 c5 e3

C67

Winawer Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.Nd4 O-O

D10

Winawer Counter Gambit, Slav

1.d4 d5 2.c4 c6 3.Nc3 e5

C46

Winawer Defense, Three Knights

1.e4 e5 2.Nf3 Nc6 3.Nc3 f5

C15

Winawer Variation, French; C15

1.e4 e6 2.d4 d5 3.Nc3 Bb4 

C15

Winckelmann-Riemer Gambit, French

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.a3

B06

Wind Gambit

1.e4 g6 2.d4 Bg7 3.Bd3

B00

Wind Gambit, Owen Defense

1.e4 b6 2.d4 Bb7 3.f3 e5

C78

Wing Attack, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Be7 7.a4

B20

Wing Formation, Smith-Morra Declined, Sicilian

1.e4 c5 2.d4 cxd4 3.c3 Qa5

B51

Wing Gambit Deferred, Sicilian

1.e4 c5 2.Nf3 d6 3.b4

B40

Wing Gambit Deferred, Sicilian

1.e4 c5 2.Nf3 e6 3.b4

B01

Wing Gambit, Center Counter

1.e4 d5 2.exd5 Nf6 3.d4 g6 4.c4 b5

C00

Wing Gambit, French

1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4

B20

Wing Gambit, Sicilian

1.e4 c5 2.b4

B28

Wing Gambit, Sicilian

1.e4 c5 2.Nf3 a6 3.b4

A00

Wing Gambit, Ware Opening

1.a4 b5

A30

Wing Variation, English

1.c4 c5 2.b4

B20

Wing; Carlsbad Variation, Sicilian

1.e4 c5 2.b4 cxb4 3.a3 bxa3

A00

Winterberg Gambit

1.g3 d5 2.Bg2 e5 3.c4 dxc4 4.b3

C12

Wolf Gambit, French

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.Nge2

A00

Wolferts Gambit, Polish

1.b4 e5 2.Bb2 c5

B00

Woodchuck Variation, St George

1.e4 a6 2.d4 Nc6

A43

Woozle Defense, Benoni

1.d4 c5 2.d5 Nf6 3.Nc3 Qa5

C77

Wormald Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2

C86

Worrall Attack, Ruy Lopez; C86

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2

A00

Wulumulu

1.h4 e5 2.d4

C29

Wurzburger Trap, Vienna

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3 Qh4 6.g3 Nxg3 7.Nf3 Qh5 8.Nd5 Bxd5 9.Nf4

C58

Yankovich Variation, Two Knights

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7.Nf3 e4 8.Qe2 Nxc4 9.dxc4 Bc5 10.Nfd2

E83

Yates Defense, KID; E83

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6

E16

Yates Variation, QID

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 a5

C91

Yates Variation, Ruy; C91

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4

B56

Yates Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bd3

D20

Yefimov Gambit, QGA

1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 b5

E97

Yepishin's Line, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 9.b4 Nh5 10.Qc2

B28

Yerevan System, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.Nc3

C37

Young Gambit, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Bxf7+ Kxf7 8.d4 Qxd4+ 9.Be3 Qf6

C37

Young Variation, KGA

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Bxf7+ Kxf7 6.O-O gxf3 7.Qxf3 Qf6 8.d4 Qxd4+ 9.Be3

B76

Yugoslav Attack, Sicilian Dragon; B76

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O

E60

Yugoslav Variation

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c5

D99

Yugoslav Variation, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be3 Nfd7 9.Qb3 c5

E64

Yugoslav Variation, KID; E64

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5

A46

Yusupov-Rubinstein System

1.d4 Nf6 2.Nf3 e6 3.e3

E08

Zagoriansky Variation, Catalan

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Rd1 b6 9.a4

B28

Zagorovsky Line, O'Kelly Sicilian

1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Qxd4

B91

Zagreb Variation, Sicilian; B91

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3

A40

Zaire Defense

1.d4 Nc6 2.d5 Nb8 3.e4 Nf6 5.e5 Ng8

D80

Zaitsev Gambit, Grunfeld

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.h4

A57

Zaitsev System, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 

C92

Zaitsev System, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Re8

A57

Zaitsev Variation, Benko Gambit

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Nf3 g6 9.Bc4

C64

Zaitsev Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nd4 5.b4

B53

Zaitsev Variation, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qd7

D00

Zeller Defesne, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Bf5

D00

Zeller Defesne, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 exf3 5.Qxf3 Bc8

C25

Zhuraviev Countergambit, Vienna

1.e4 e5 2.Nc3 Bb4 3.Qg4 Nf6

C25

Zhuravlev Counter-Gambit, Vienna

1.e4 e5 2.Nc3 Bb4 3.Qg4

D00

Ziegler; Gunderam's 2nd Defense, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6

C30

Zilbermints Double Countergambit; KGD

1.e4 e5 2.f4 g5

C30

Zilbermints Double Gambit I, KGD

1.e4 e5 2.f4 Nc6 3.Nf3 g5

A40

Zilbermints Gambit

1.d4 e6 2.c4 e5

A40

Zilbermints Gambit II, Englund Gambit

1.d4 e5 2.dxe5 Nc6 3.Nf3 h6

D00

Zilbermints Gambit, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6  6.Bg5 Be7 7.Bd3 Nc6 8.O-O Nxd4 9.Kh1

B00

Zilbermints Gambit, Borg

1.e4 g5 2.d4 e5

B00

Zilbermints Gambit, Carr Defense

1.e4 h6 2.d4 e5

B01

Zilbermints Gambit, Center Counter

1.e4 d5 2.b4

A10

Zilbermints Gambit, English

1.c4 g5 2.d4 e5

A40

Zilbermints Gambit, Englund Gambit

1.d4 e5 2.dxe5 Nc6 3.Nf3 Nge7

A00

Zilbermints Gambit, Grob

1.g4 d5 2.e4

A00

Zilbermints Gambit, Grob

1.g4 d5 2.e4 dxe4 3.Nc3

D06

Zilbermints Gambit, QGD

1.d4 d5 2.c4 b5

A09

Zilbermints Gambit, Reti

1.Nf3 d5 2.c4 b5

B00

Zilbermints Gambit, St George Defense

1.e4 a6 2.d4 e5

A43

Zilbermints Gambit; Nakamura Gambit, Benoni

1.d4 c5 2.b4 cxb4

D00

Zilbermints Variation, BDG

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5 Bf5 5.Bxf6 exf6 6.g4 Bg6 7.Qe2 Bb4 8.Qb5+

D02

Zilbermints Variation, QP

1.d4 d5 2.Nf3 Nf6 3.c4 b5

A43

Zilbermints-Benoni Gambit

1.d4 c5 2.Nf3 cxd4 3.b4

E90

Zinnowitz Variation, KID

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Bg5

B73

Zollner Gambit, Sicilian

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.O-O O-O 9.f4 Qb6

D00

Zot

1.d4 d5 2.Bg5

C25

Zukertort Defense, Vienna

1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5

C64

Zukertort Gambit, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nf6 5.c3

C41

Zukertort Variation, Philidor

1.e4 e5 2.Nf3 d6 3.d4 f5 4.Nc3

D05

Zukertort Variation, QP

1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3

D02

Zukertort Variation, QP; D02

1.d4 d5 2.Nf3

C80

Zukertort Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Ne7

C67

Zukertort Variation, Ruy Lopez

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nb7 9.c4

D00

Zurich Gambit

1.d4 d5 2.g4

A17

Zviagintsev-Krasenkov Attack, English

1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g4

 

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