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Chess Openings Classification Code Index-play against computer
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C01:
French Defence, Exchange Variation: 1.e4 e6 2.d4 d5 3.exd5 exd5
C02:
French Defence, Advance Variation: 1.e4 e6 2.d4 d5 3.e5
C03:
French Defence, Tarrasch Variation and unusual Black third moves: 1.e4 e6 2.d4
d5 3.Nd2
C04:
French Defence, Tarrasch Variation with 3...Nc6: 1.e4 e6 2.d4 d5 3.Nd2 Nc6
C05:
French Defence, Tarrasch Variation 3...Nf6 4.e5 Nfd7, unusual White fifth
moves: 1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7
C06:
French Defence, Tarrasch Variation 3...Nf6 4.e5 Nfd7 5.Bd3 main line: 1.e4 e6
2.d4 d5 3.Nd2 Nf6
4.e5
Nfd7 5.Bd3
C07:
French Defence, Tarrasch Variation 3...c5, various White fourth moves: 1.e4 e6
2.d4 d5 3.Nd2 c5
C08:
French Defence, Tarrasch Variation 3...c5 4.exd5 exd5 sidelines: 1.e4 e6 2.d4
d5 3.Nd2 c5 4.exd5
exd5
C09:
French Defence, Tarrasch Variation 3...c5 main line: 1.e4 e6 2.d4 d5 3.Nd2 c5
4.exd5 exd5
5.Ngf3
Nc6
C10:
French Defence, 3.Nc3 sidelines: 1.e4 e6 2.d4 d5 3.Nc3
C10:
French Defence, Rubinstein Variation: 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4
C11:
French Defence, Steinitz Variation: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5
C12:
French Defence, MacCutcheon Variation: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4
C13:
French Defence, Burn Variation: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4
C14:
French Defence, Classical main line: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5
C15:
French Defence, Winawer Variation sidelines: 1.e4 e6 2.d4 d5 3.Nc3 Bb4
C16:
French Defence, Winawer Variation without ...c5: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5
C17:
French Defence, Winawer Variation 4...c5 sidelines: 1.e4 e6 2.d4 d5 3.Nc3 Bb4
4.e5 c5
C18:
French Defence, Winawer Variation with 6...Qc7: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5
c5 5.a3 Bxc3+
6.bxc3
Qc7
C19:
French Defence, Winawer Variation main line 6...Ne7 7.Nf3 Qc7: 1.e4 e6 2.d4 d5
3.Nc3 Bb4 4.e5
c5
5.a3 Bxc3+ 6.bxc3 Ne7 7.Nf3 Qc7
C20:
Open games, various White second moves: 1.e4 e5
C21:
Danish Gambit: 1.e4 e5 2.d4 exd4 3.c3
C22:
Center Game: 1.e4 e5 2.d4 exd4 3.Qxd4
C23:
Bishop's Opening, 2...Bc5: 1.e4 e5 2.Bc4 Bc5
C24:
Bishop's Opening, 2...Nf6: 1.e4 e5 2.Bc4 Nf6
C25:
Vienna Game, early deviations: 1.e4 e5 2.Nc3
C26:
Vienna Gambit: 1.e4 e5 2.Nc3 Nc6 3.f4
C27:
Vienna Game, 2...Nf6 sidelines: 1.e4 e5 2.Nc3 Nf6
C28:
Vienna Game, 2...Nf6 Bishop's Variation: 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6
C29:
Vienna Game, Classical main line: 1.e4 e5 2.Nc3 Nf6 3.f4
C30:
King's Gambit: 1.e4 e5 2.f4
C31:
Falkbeer Countergambit sidelines: 1.e4 e5 2.f4 d5 3.exd5
C32:
Falkbeer Countergambit main line: 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6
C33:
King's Gambit Accepted sidelines: 1.e4 e5 2.f4 exf4
C33:
King's Gambit Accepted, King's Bishop's Gambit: 1.e4 e5 2.f4 exf4 3.Bc4
C34:
King's Gambit Accepted, King's Knight's Gambit sidelines: 1.e4 e5 2.f4 exf4
3.Nf3
C35:
King's Gambit Accepted, Cunningham-Euwe Variation: 1.e4 e5 2.f4 exf4 3.Nf3 Be7
C36:
King's Gambit Accepted, Modern Variation: 1.e4 e5 2.f4 exf4 3.Nf3 d5
C37:
King's Gambit Accepted, Muzio Gambit: 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O
gxf3 6.
Qxf3
C38:
King's Gambit Accepted, Neumann's Defence: 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7
C39:
King's Gambit Accepted, Kieseritzky Gambit: 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4
5.Ne5
C40:
Elephant Gambit: 1.e4 e5 2.Nf3 d5
C40:
Latvian Gambit: 1.e4 e5 2.Nf3 f5
C41:
Philidor Defence: 1.e4 e5 2.Nf3 d6
C42:
Petroff Defence, unusual White third moves: 1.e4 e5 2.Nf3 Nf6
C42:
Petroff Defence, 3.Nxe5 early deviations: 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3
Nxe4
C42:
Petroff Defence, 3.Nxe5 main line: 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4
d5 6.Bd3
C43:
Petroff Defence, 3.d4: 1.e4 e5 2.Nf3 Nf6 3.d4
C44:
Ponziani Opening: 1.e4 e5 2.Nf3 Nc6 3.c3
C44:
Göring Gambit: 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3
C44:
Scotch Gambit: 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 (4...Nf6--C55,
4...Bc5--C54/C56, 4...Be7--
C50)
C45:
Scotch Game: 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4
C46:
Three Knights' Game: 1.e4 e5 2.Nf3 Nc6 3.Nc3 (3...Nf6--C47)
C47:
Four Knights' Game sidelines: 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6
C48:
Four Knights' Game, Belgrade Gambit: 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4
C48:
Four Knights' Game, Spanish Variation sidelines: 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6
4.Bb5
C48:
Four Knights' Game, Rubinstein Variation: 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4
C48:
Four Knights' Game, Marshall Variation: 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5
C48:
Four Knights' Game, Symmetrical Variation: 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5
Bb4 5.O-O
O-O
6.d3 d6
C49:
Four Knights' Game, Symmetrical Variation main line: 1.e4 e5 2.Nf3 Nc6 3.Nc3
Nf6 4.Bb5
Bb4
5.O-O O-O 6.d3 d6
C50:
Hungarian Defence: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7
C50:
Italian Game: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5
C50:
Giuoco Pianissimo: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3
C51:
Evans' Gambit sidelines: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4
C52:
Evans' Gambit main line: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5
C53:
Giuoco Piano, 4.c3 sidelines: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3
C54:
Giuoco Piano, 4.c3 Nf6 5.d4 main line: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6
5.d4 exd4 6.
cxd4
Bb4+
C54:
Giuoco Piano, Wing Attack: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.b4
C54:
Giuoco Piano, Modern System: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d3
C55:
Two Knights' Defence, 4.d3: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3
C56:
Two Knights' Defence, Max Lange Attack: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4
5.O-O Bc5
6.
e5
C56:
Two Knights' Defence, Modern Attack: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.e5
C57:
Two Knights' Defence, Polerio Variation: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5
C57:
Two Knights' Defence, Wilkes-Barre Variation: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5
Bc5
C57:
Two Knights' Defence, Fritz Variation: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5
5.exd5 Nd4 6.
c3
b5 7.Bf1 Nxd5
C57:
Two Knights' Defence, Fried Liver Attack: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5
5.exd5
Nxd5
6.Nxf7
C58:
Two Knights' Defence, 5...Na5 sidelines: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5
5.exd5 Na5
6.
Bb5+ c6 7.dxc6 bxc6
C59:
Two Knights' Defence, 5...Na5 main line: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5
5.exd5 Na5
6.Bb5+
c6 7.dxc6 bxc6 8.Be2
C60:
Ruy Lopez, early deviations: 1.e4 e5 2.Nf3 Nc6 3.Bb5
C60:
Ruy Lopez, Smyslov Variation: 1.e4 e5 2.Nf3 Nc6 3.Bb5 g6
C60:
Ruy Lopez, Cozio System: 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7
C61:
Ruy Lopez, Bird's Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4
C62:
Ruy Lopez, Steinitz Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6
C63:
Ruy Lopez, Schliemann Gambit: 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5
C64:
Ruy Lopez, Classical Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 (4.O-O Nf6--C65)
C65:
Ruy Lopez, Berlin Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6
C65:
Ruy Lopez, Classical Berlin Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Bc5
C66:
Ruy Lopez, Berlin Defence with 4...d6: 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6
C67:
Ruy Lopez, Berlin Defence main line: 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4
C68:
Ruy Lopez, Exchange Variation: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6
C69:
Ruy Lopez, Exchange Variation with 5.O-O f6: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6
dxc6 5.O-O f6
C70:
Ruy Lopez, Norwegian Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5
C70:
Ruy Lopez, Delayed Schliemann Gambit: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5
C71:
Ruy Lopez, Deferred Steinitz Defence sidelines: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6
4.Ba4 d6
C72:
Ruy Lopez, Deferred Steinitz Defence with 5.O-O: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6
4.Ba4 d6 O-O
C73:
Ruy Lopez, Deferred Steinitz Defence with 5.Bxc6+: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6
4.Ba4 d6 5.
Bxc6+
C74:
Ruy Lopez, Deferred Steinitz Defence with 5.c3 f5: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6
4.Ba4 d6 5.c3 f5
C75:
Ruy Lopez, Deferred Steinitz Defence with 5.c3 Bd7 6.d4 without ...g6: 1.e4 e5
2.Nf3 Nc6 3.
Bb5
a6 4.Ba4 d6 5.c3 Bd7 6.d4
C76:
Ruy Lopez, Deferred Steinitz Defence 5.c3 Bd7 6.d4 g6 main line: 1.e4 e5 2.Nf3
Nc6 3.Bb5 a6
4.
Ba4 d6 5.c3 Bd7 6.d4 g6 7.O-O Bg7
C77:
Ruy Lopez, 3...a6 4.Ba4 Nf6 sidelines: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6
C78:
Ruy Lopez, Möller Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5
C78:
Ruy Lopez, Arkhangelsk Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5
6.Bb3
Bb7
C79:
Ruy Lopez, Russian Defence: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6
C80:
Open Ruy Lopez sidelines: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4
C80:
Open Ruy Lopez with 9.Nbd2: 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.Nbd2
C81:
Open Ruy Lopez, Keres Variation: 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.Qe2
C82:
Open Ruy Lopez, Italian Defence: 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
C83:
Open Ruy Lopez, 9.c3 main line: 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 Be7
C84:
Closed Ruy Lopez, sixth move sidelines: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6
5.O-O Be7
C85:
Closed Ruy Lopez, Deferred Exchange Variation: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4
Nf6 5.O-O
Be7
6.Bxc6 dxc6
C86:
Closed Ruy Lopez, Worrall Attack: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O
Be7 6.Qe2
C87:
Closed Ruy Lopez, 6...d6: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1
d6
C88:
Closed Ruy Lopez, Anti-Marshall Systems: 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--C90-C99, 8.c3 d5--C89)
C89:
Closed Ruy Lopez, Marshall Gambit: 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
C90:
Closed Ruy Lopez with 7...d6, early deviations: 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6
4.Ba4 Nf6 5.O-O
Be7
6.Re1 b5 7.Bb3 d6
C91:
Closed Ruy Lopez, 7...d6 without 9.h3: 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
C92:
Closed Ruy Lopez, 9.h3 sidelines: 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
C92:
Closed Ruy Lopez, Bulgarian Variation: 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 Nd7
C92:
Closed Ruy Lopez, Zaitsev Variation: 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 Bb7
C93:
Closed Ruy Lopez, Smyslov Variation: 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
C94:
Closed Ruy Lopez, Breyer Variation with 10.d3: 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.d3
C95:
Closed Ruy Lopez, Breyer Variation with 10.d4: 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
C96:
Closed Ruy Lopez, Chigorin Variation without 11...Qc7: 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 d4
C97:
Closed Ruy Lopez, 11...Qc7 sidelines: 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
C98:
Closed Ruy Lopez, Chigorin Defence with 12...Nc6: 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
C99:
Closed Ruy Lopez, Chigorin Defence main line: 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 cxd4 13.cxd4
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