Eröffnungsregister (ECO-Code)

• A00 - Uncommon Openings: 1.g3 (Benko Opening), 1.♞c3 (Sleipner Opening), 1.a3 (Anderssen's Opening), 1.b4 (Sokolsky Opening), 1.g4 (Grob's Attack), 1.h3 (♝asmanic Defence), 1.c3 (Saragossa Opening), 1.d3 (Mieses Opening), 1.e3 (French Attack), 1.h4 (Desprez Opening), 1.a4 (Ware Opening), 1.♞h3 (Amar Opening), 1.♞a3 (Durkin's Attack), 1.f3 (Gedult's Opening)
• A01 - Nimzowitsch-Larsen Attack: 1.b3
• A02 - Bird's Opening: 1.f4
• A03 - Bird's Opening: 1.f4 d5
• A04 - Reti Opening: 1.♞f3
• A05 - Reti Opening: 1.♞f3 ♞f6
• A06 - Reti Opening: 1.♞f3 d5
• A08 - King's Indian Attack: 1.♞f3 d5 2.g3 c5 3.♝g2
• A09 - Reti Opening: 1.♞f3 d5 2.c4
• A10 - English: 1.c4
• A12 - English with b3: 1.c4 c6 2.♞f3 d5 3.b3
• A13 - English: 1.c4 e6
• A15 - English: 1.c4 ♞f6
• A16 - English: 1.c4 ♞f6 2.♞c3
• A18 - English, Mikenas-Carls: 1.c4 ♞f6 2.♞c3 e6 3.e4
• A19 - English, Mikenas-Carls, Sicilian Variation: 1.c4 ♞f6 2.♞c3 e6 3.e4 c5
• A20 - English: 1.c4 e5
• A21 - English: 1.c4 e5 2.♞c3
• A25 - English: 1.c4 e5 2.♞c3 ♞c6
• A27 - English, Three Knights System: 1.c4 e5 2.♞c3 ♞c6 3.♞f3
• A28 - English: 1.c4 e5 2.♞c3 ♞c6 3.♞f3 ♞f6
• A30 - English, Symmetrical: 1.c4 c5
• A31 - English, Symmetrical, Benoni Formation: 1.c4 c5 2.♞f3 ♞f6 3.d4
• A32 - English, Symmetrical Variation: 1.c4 c5 2.♞f3 ♞f6 3.d4 cxd4 4.♞xd4 e6
• A33 - English, Symmetrical: 1.c4 c5 2.♞f3 ♞f6 3.d4 cxd4 4.♞xd4 e6 5.♞c3 ♞c6
• A34 - English, Symmetrical: 1.c4 c5 2.♞c3
• A36 - English, Symmetrical: 1.c4 c5 2.♞c3 ♞c6 3.g3 g6 4.♝g2 ♝g7
• A40 - Unusual Black responses to 1.d4: 1...e5 (Englund Gambit), 1...b5 (Polish Defence), 1...♞c6 (Nimzowitsch Defence), 1...g6 (Modern Defence without 2.e4), 1...e6 (French Indian Defence).
• A41 - Tartakower System: 1.d4 d6
• A45 - Unusual Indian Openings: 1.d4 ♞f6
• A46 - Unusual Indian Openings with 2.♞f3: 1.d4 ♞f6 2.♞f3
• A47 - Unusual Indian Openings with 2.♞f3: 1.d4 ♞f6 2.♞f3 b6
• A50 - Black Knights' Tango: 1.d4 ♞f6 2.c4 ♞c6
• A52 - Budapest Gambit Main Lines: 1.d4 ♞f6 2.c4 e5 3.dxe5 ♞g4
• A53 - Old Indian Defence: 1.d4 ♞f6 2.c4 d6
• A54 - Old Indian Defence main lines: 1.d4 ♞f6 2.c4 d6 3.♞c3 e5
• A55 - Old Indian Defence main lines: 1.d4 ♞f6 2.c4 d6 3.♞c3 e5 4.♞f3
• A61 - Modern Benoni without early e4: 1.d4 ♞f6 2.c4 c5 3.d5 e6 4.♞c3 exd5 5.cxd5 d6
• A80 - Dutch Defence and unusual White second moves: 1.d4 f5
• A81 - Dutch Defence with 2.g3: 1.d4 f5 2.g3
• A83 - Dutch Defence, Staunton Gambit with 3.♞c3 ♞f6 4.♝g5: 1.d4 f5 2.e4 fxe4 3.♞c3 ♞f6 4.♝g5
• A84 - Dutch Defence, 2.c4: 1.d4 f5 2.c4
• A85 - Dutch Defence, 2.c4 ♞f6 3.♞c3: 1.d4 f5 2.c4 ♞f6 3.♞c3
• A90 - Dutch Defence sidelines and Stonewall: 1.d4 f5 2.c4 ♞f6 3.g3 e6
• B00 - Irregular Asymmetrical Responses to 1.e4: 1...a6 (St.George's Defence), 1...b6 (Owens' Defence), 1...f6 (♝arnes Defence), 1...h6 (Carr Defence), 1...♞a6 (Lemming Defence), 1...♞c6 (Nimzowitsch Defence), 1...♞h6 (Adams Defence), 1...a5 (Cornstalk Defence), 1...b5 (Polish Gambit), 1...f5 (Fred Defence), 1...g5 (Borg Defence), 1...h5 (Goldsmith Defence)
• B01 - Scandinavian Defence: 1.e4 d5
• B02 - Alekhine Defence: Unusual White third moves: 1.e4 ♞f6 2.e5 ♞d5 3.g3, 3.c4, 3.♞c3
• B03 - Alekhine Defence, Four Pawns' Attack: 1.e4 ♞f6 2.e5 ♞d5 3.d4 d6 4.g3
• B07 - Pirc Defence, Unusual White second and third moves: 1.e4 d6
• B10 - Caro-Kann Defence, Unusual White second moves: 1.e4 c6
• B11 - Caro-Kann Defence, Unusual Black second moves: 1.e4 c6 2.d4
• B12 - Caro-Kann Defence, Classical Variation: 1.e4 c6 2.d4 d5 3.♞c3 dxe4 4.♞xe4 ♝f5
• B13 - Caro-Kann Defence, Exchange Variation: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3
• B15 - Caro-Kann Defence, 3.♞c3 sidelines: 1.e4 c6 2.d4 d5 3.♞c3
• B16 - Caro-Kann Defence, Larsen-Bronstein Variation: 1.e4 c6 2.d4 d5 3.♞c3 dxe4 4.♞xe4 ♞f6 5. ♞xf6 gxf6
• B17 - Caro-Kann Defence, Modern Variation: 1.e4 c6 2.d4 d5 3.♞c3 dxe4 4.♞xe4 ♞d7
• B20 - Sicilian Defence, Unusual White second moves: 1.e4 c5
• B21 - Sicilian Defence, 2.f4 Attack: 1.e4 c5 2.f4
• B22 - Sicilian Defence, Alapin Variation: 1.e4 c5 2.c3
• B24 - Closed Sicilian, 3.g3 sidelines: 1.e4 c5 2.♞c3 ♞c6 3.g3
• B29 - Sicilian Defence, Nimzowitsch Variation: 1.e4 c5 2.♞f3 ♞f6
• B30 - Sicilian Defence, Rossolimo Variation without ...g6: 1.e4 c5 2.♞f3 ♞c6 3.♝b5
• B31 - Sicilian Defence, Rossolimo Variation with 3...g6: 1.e4 c5 2.♞f3 ♞c6 3.♝b5 g6
• B32 - Sicilian Defence, Löwenthal and Kalashnikov Variations: 1.e4 c5 2.♞f3 ♞c6 3.d4 cxd4 4.♞xd4 e5
• B34 - Sicilian Defence, Accelerated Dragon sidelines: 1.e4 c5 2.♞f3 ♞c6 3.d4 cxd4 4.♞xd4 g6
• B37 - Sicilian Defence, Maroczy Bind with 5...♝g7 sidelines: 1.e4 c5 2.♞f3 ♞c6 3.d4 cxd4 4.♞xd4 g6 5.c4 ♝g7
• B38 - Sicilian Defence, Maroczy Bind with 5...♝g7 and 7...O-O: 1.e4 c5 2.♞f3 ♞c6 3.d4 cxd4 4.♞xd4 g6 5.c4 ♝g7 6.♝e3 ♞f6 7.♞c3 O-O
• B40 - Sicilian Defence, 2...e6 miscellaneous: 1.e4 c5 2.♞f3 e6
• B44 - Sicilian Defence, Taimanov Variation with 5.♞b5: 1.e4 c5 2.♞f3 e6 3.d4 cxd4 4.♞xd4 ♞c6 5.♞b5
• B50 - Sicilian Defence, 2...d6 miscellaneous: 1.e4 c5 2.♞f3 d6
• B57 - Classical Sicilian, Sozin Variation: 1.e4 c5 2.♞f3 ♞c6 3.d4 cxd4 4.♞xd4 ♞f6 5.♞c3 d6 6.♝c4
• B73 - Dragon Sicilian, Classical System without ♞b3: 1.e4 c5 2.♞f3 d6 3.d4 cxd4 4.♞xd4 ♞f6 5.♞c3 g6 6.♝e3 ♝g7 7.♝e2 ♞c6 8.O-O O-O
• C00 - French Defence, unusual White second moves: 1.e4 e6
• 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.♞d2
• C05 - French Defence, Tarrasch Variation 3...♞f6 4.e5 ♞fd7, unusual White fifth moves: 1.e4 e6 2.d4 d5 3.♞d2 ♞f6 4.e5 ♞fd7
• C07 - French Defence, Tarrasch Variation 3...c5, various White fourth moves: 1.e4 e6 2.d4 d5 3.♞d2 c5
• C08 - French Defence, Tarrasch Variation 3...c5 4.exd5 exd5 sidelines: 1.e4 e6 2.d4 d5 3.♞d2 c5 4.exd5 exd5
• C10 - French Defence, 3.♞c3 sidelines: 1.e4 e6 2.d4 d5 3.♞c3
• C11 - French Defence, Steinitz Variation: 1.e4 e6 2.d4 d5 3.♞c3 ♞f6 4.e5
• C12 - French Defence, MacCutcheon Variation: 1.e4 e6 2.d4 d5 3.♞c3 ♞f6 4.♝g5 ♝b4
• C13 - French Defence, Burn Variation: 1.e4 e6 2.d4 d5 3.♞c3 ♞f6 4.♝g5 dxe4
• C14 - French Defence, Classical main line: 1.e4 e6 2.d4 d5 3.♞c3 ♞f6 4.♝g5 ♝e7 5.e5
• C15 - French Defence, Winawer Variation sidelines: 1.e4 e6 2.d4 d5 3.♞c3 ♝b4
• C16 - French Defence, Winawer Variation without ...c5: 1.e4 e6 2.d4 d5 3.♞c3 ♝b4 4.e5
• C17 - French Defence, Winawer Variation 4...c5 sidelines: 1.e4 e6 2.d4 d5 3.♞c3 ♝b4 4.e5 c5
• C23 - Bishop's Opening, 2...Bc5: 1.e4 e5 2.Bc4 Bc5
• C24 - Bishop's Opening, 2...♞f6: 1.e4 e5 2.♝c4 ♞f6
• C25 - Vienna Game, early deviations: 1.e4 e5 2.♞c3
• C26 - Vienna Gambit: 1.e4 e5 2.♞c3 ♞c6 3.f4
• C27 - Vienna Game, 2...♞f6 sidelines: 1.e4 e5 2.♞c3 ♞f6
• C28 - Vienna Game, 2...♞f6 Bishop's Variation: 1.e4 e5 2.♞c3 ♞f6 3.♝c4 ♞c6
• C29 - Vienna Game, Classical main line: 1.e4 e5 2.♞c3 ♞f6 3.f4
• C30 - King's Gambit: 1.e4 e5 2.f4
• C31 - Falkbeer Countergambit sidelines: 1.e4 e5 2.f4 d5 3.exd5
• C34 - King's Gambit Accepted, King's Knight's Gambit sidelines: 1.e4 e5 2.f4 exf4 3.♞f3
• C36 - King's Gambit Accepted, Modern Variation: 1.e4 e5 2.f4 exf4 3.♞f3 d5
• C39 - King's Gambit Accepted, Kieseritzky Gambit: 1.e4 e5 2.f4 exf4 3.♞f3 g5 4.h4 g4 5.♞e5
• C40 - Elephant Gambit: 1.e4 e5 2.♞f3 d5
• C41 - Philidor Defence: 1.e4 e5 2.♞f3 d6
• C42 - Petroff Defence, unusual White third moves: 1.e4 e5 2.♞f3 ♞f6
• C44 - Ponziani Opening: 1.e4 e5 2.♞f3 ♞c6 3.c3
• C45 - Scotch Game: 1.e4 e5 2.♞f3 ♞c6 3.d4 exd4 4.♞xd4
• C46 - Three Knights' Game: 1.e4 e5 2.♞f3 ♞c6 3.♞c3 (3...♞f6--C47)
• C47 - Four Knights' Game sidelines: 1.e4 e5 2.♞f3 ♞c6 3.♞c3 ♞f6
• C48 - Four Knights' Game, Belgrade Gambit: 1.e4 e5 2.♞f3 ♞c6 3.♞c3 ♞f6 4.d4
• C49 - Four Knights' Game, Symmetrical Variation main line: 1.e4 e5 2.♞f3 ♞c6 3.♞c3 ♞f6 4.♝b5 ♝b4 5.O-O O-O 6.d3 d6
• C50 - Hungarian Defence: 1.e4 e5 2.♞f3 ♞c6 3.♝c4 ♝e7
• C53 - Giuoco Piano, 4.c3 sidelines: 1.e4 e5 2.♞f3 ♞c6 3.♝c4 ♝c5 4.c3
• C61 - Ruy Lopez, Bird's Defence: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 ♞d4
• C62 - Ruy Lopez, Steinitz Defence: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 d6
• C63 - Ruy Lopez, Schliemann Gambit: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 f5
• C64 - Ruy Lopez, Classical Defence: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 ♝c5 (4.O-O ♞f6--C65)
• C66 - Ruy Lopez, Berlin Defence with 4...d6: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 ♞f6 4.O-O d6
• C68 - Ruy Lopez, Exchange Variation: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 a6 4.♝xc6 dxc6
• C77 - Ruy Lopez, 3...a6 4.♝a4 ♞f6 sidelines: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 a6 4.♝a4 ♞f6
• C80 - Open Ruy Lopez sidelines: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 a6 4.♝a4 ♞f6 5.O-O ♞xe4
• C82 - Open Ruy Lopez, Italian Defence: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 a6 4.♝a4 ♞f6 5.O-O ♞xe4 6.d4 b5 7.♝b3 d5 8.dxe5 ♝e6 9.c3 ♝c5
• C87 - Closed Ruy Lopez, 6...d6: 1.e4 e5 2.♞f3 ♞c6 3.♝b5 a6 4.♝a4 ♞f6 5.O-O ♝e7 6.♜e1 d6
• D00 - 1.d4 d5 unusual lines: 1.d4 d5
• D01 - Veresov Opening: 1.d4 d5 2.♞c3 ♞f6 3.♝g5
• D02 - 1.d4 d5 2.♞f3 sidelines: 1.d4 d5 2.♞f3 (2...f5--A80)
• D04 - Colle System: 1.d4 d5 2.♞f3 ♞f6 3.e3
• D05 - Colle System with ...e6: 1.d4 d5 2.♞f3 ♞f6 3.e3 e6
• D06 - Queen's Gambit, Marshall Defence: 1.d4 d5 2.c4 ♞f6 3.cxd5
• D07 - Queen's Gambit, Chigorin Defence: 1.d4 d5 2.c4 ♞c6
• D10 - Slav Defence sidelines: 1.d4 d5 2.c4 c6
• D11 - Slav Defence, 3.♞f3 sidelines: 1.d4 d5 2.c4 c6 3.♞f3
• D12 - Slav Defence, 4.e3 ♝f5: 1.d4 d5 2.c4 c6 3.♞f3 ♞f6 4.e3 ♝f5
• D13 - Slav Defence, Classical Exchange Variation without ...♝f5: 1.d4 d5 2.c4 c6 3.♞f3 ♞f6 4.cxd5 cxd5
• D16 - Slav Defence, Smyslov System: 1.d4 d5 2.c4 c6 3.♞f3 ♞f6 4.♞c3 dxc4 5.a4 ♞a6
• D17 - Slav Defence, 5...♝f5 sidelines: 1.d4 d5 2.c4 c6 3.♞f3 ♞f6 4.♞c3 dxc4 5.a4 ♝f5
• D30 - Queen's Gambit Declined without 3.♞c3: 1.d4 d5 2.c4 e6
• D32 - Tarrasch Defence sidelines: 1.d4 d5 2.c4 e6 3.♞c3 c5
• D33 - Tarrasch Defence, 6.g3 sidelines: 1.d4 d5 2.c4 e6 3.♞c3 c5 4.cxd5 cxd5 5.♞f3 ♞c6 6.g3
• D35 - Queen's Gambit Declined, early deviations: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6
• D36 - Queen's Gambit Declined, Exchange Variation main line: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.cxd5 exd5 5.♝g5 ♝e7 6.Qc2
• D37 - Queen's Gambit Declined with 5.♝f4: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♞f3 4.♝e7 5.♝f4
• D38 - Queen's Gambit Declined, Ragozin Defence: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♞f3 4.♝b4
• D40 - Queen's Gambit Declined, Semi-Tarrasch Defence: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♞f3 4.c5
• D41 - Queen's Gambit Declined, Semi-Tarrasch Defence with 5.cxd5: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♞f3 4.c5 5.cxd5 ♞xd5
• D45 - Semi-Slav, 5.e3: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♞f3 c6 5.e3
• D46 - Semi-Slav, 5.e3 ♞bd7 6.♝d3 where Black avoids the Meran: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♞f3 c6 5.e3 ♞bd7 6.♝d3
• D50 - Queen's Gambit Declined, Dutch-Peruvian Gambit: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♝g5 c5
• D51 - Queen's Gambit Declined, 4.♝g5 ♞bd7 sidelines: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♝g5 ♞bd7
• D52 - Queen's Gambit Declined, Cambridge Springs Variation: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♝g5 ♞bd7 5.e3 c6 6.♞f3 Qa5
• D53 - Queen's Gambit Declined, Orthodox Variation early deviations: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♝g5 ♝e7
• D55 - Queen's Gambit Declined, Orthodox Variation without ...h6: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♝g5 ♝e7 5.e3 O-O 6.♞f3
• D61 - Queen's Gambit Declined, Classical Variation with 7.Qc2: 1.d4 d5 2.c4 e6 3.♞c3 ♞f6 4.♝g5 ♝e7 5.e3 ♞bd7 6.♞f3 ♞bd7 7.Qc2
• D70 - Grünfeld Defence, unusual White third moves met by 3...d5: 1.d4 ♞f6 2.c4 g6 (3.♞c3--E20-E99)
• D94 - Grünfeld Defence, Closed Variation sidelines: 1.d4 ♞f6 2.c4 g6 3.♞c3 d5 4.♞f3 ♝g7 5.e3
• E00 - Various Indian Defences: 1.d4 ♞f6
• E11 - Bogo-Indian Defence: 1.d4 ♞f6 2.c4 e6 3.♞f3 ♝b4+
• E12 - Queen's Indian Defence: 1.d4 ♞f6 2.c4 e6 3.♞f3 b6
• E13 - Queen's Indian Defence, 4.♞c3, Main line: 1.d4 ♞f6 2.c4 e6 3.♞f3 b6 4.♞c3
• E14 - Queen's Indian Defence, 4.e3 : 1.d4 ♞f6 2.c4 e6 3.♞f3 b6 4.e3
• E15 - Queen's Indian Defence, 4.g3 : 1.d4 ♞f6 2.c4 e6 3.♞f3 b6 4.g3
• E16 - Queen's Indian Defence, Capablanca Variation: 1.d4 ♞f6 2.c4 e6 3.♞f3 b6 4.g3 ♝b7 5.♝g2 ♝b4+
• E18 - Queen's Indian Defence, 5.♝g2 ♝e7: 1.d4 ♞f6 2.c4 e6 3.♞f3 b6 4.g3 ♝b7 5.♝g2 ♝e7 6.O-O O-O 7.♞c3
• E20 - Nimzo-Indian Defence: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4
• E21 - Nimzo-Indian, Three knights variation: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.♞f3
• E22 - Nimzo-Indian, Spielmann Variation: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.Qb3
• E23 - Nimzo-Indian, Spielmann, 4...c5, 5.dc ♞c6: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.Qb3 c5 5.dxc5 ♞c6
• E30 - Nimzo-Indian, Leningrad Variation: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.♝g5
• E32 - Nimzo-Indian, Classical Variation: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.Qc2
• E33 - Nimzo-Indian, Classical Variation, 4...♞c6: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.Qc2 ♞c6
• E34 - Nimzo-Indian, Classical, Noa Variation: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.Qc2 d5
• E35 - Nimzo-Indian, Classical, Noa Variation, 5.cxd5 exd5: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.Qc2 d5 5.cxd5 exd5
• E37 - Nimzo-Indian, Classical, Noa Variation, Main line, 7.Qc2: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.Qc2 d5 5.a3 ♝xc3+ 6.Qxc3 ♞e4
• E42 - Nimzo-Indian, 4.e3 c5, 5.♞e2 (Rubinstein): 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.e3 c5 5.♞e2
• E43 - Nimzo-Indian, Fischer Variation: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.e3 b6
• E50 - Nimzo-Indian, 4.e3 O-O, 5.♞f3, without ...d5: 1.d4 ♞f6 2.c4 e6 3.♞c3 ♝b4 4.e3 O-O 5.♞f3
• E60 - King's Indian Defence: 1.d4 ♞f6 2.c4 g6
• E77 - King's Indian, Four Pawns Attack, with ♝e2: 1.d4 ♞f6 2.c4 g6 3.♞c3 ♝g7 4.e4 d6 5.f4 O-O 6.♝e2
• E81 - King's Indian, Sämisch, 5...O-O: 1.d4 ♞f6 2.c4 g6 3.♞c3 ♝g7 4.e4 d6 5.f3 O-O