OPENINGS THEORY
- ECO CODES BASE -

- D47 -

QGD: SEMI-SLAV, 7.Bxc4
(Meran Variation: 7...b5)

[D47-a] - QGD: semi-Slav, 7.Bxc4 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 (RMOP: (Relat. Mixed Opening)) (see also: D10, D27, D29, D45, D46, D48, D49)

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[D47-b] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 (RMOP: (Relat. Mixed Opening)) (see also: D29, D46, D48, D49)

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[D47-c] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Be2 (a6) (TPOP: (Totally Pure Opening))

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[D47-d] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Be2 Bb7    (TPOP:)

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[D47-e] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Be2 Bb7 9.e4 b4 +/=    (TPOP:)

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[D47-f] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Be2 Bb7 9.e4 b4 10.e5 bxc3 11.exf6 (cxb2) +/=    (TPOP:)

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[D47-g] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Be2 Bb7 9.0-0 +/=    (TPOP:)

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[D47-h] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Be2 Bb7 9.a3?! =    (TPOP:)

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[D47-i] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bb3 +/=    (TPOP:)

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[D47-j] - QGD: semi-Slav, Meran variation 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bb3 b4! =    (TPOP:)

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[D47-k] - QGD: semi-Slav, Meran variation Randviir retort: 9...Ba6?! 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bb3 b4 9.Ne2 Ba6?! +/=    (TPOP:)

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[D47-l] - QGD: semi-Slav, Meran variation Kotov retort: 9...Bb7 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bb3 b4 9.Ne2 Bb7 =    (TPOP:)

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[D47-m] - QGD: semi-Slav, Meran variation Noteboom retort: 9...Be7!? 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bb3 b4 9.Ne2 Be7!? =/+    (TPOP:)

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[D47-n] - QGD: semi-Slav, Meran variation Main line: 8.Bd3 (Carl Schlechter) 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 =/unclear    (RMOP:) (see also: D48, D49)

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[D47-o] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 +/=    (TPOP:)

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[D47-p] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Spielmann retort: 9.Na4 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Na4 +/=    (TPOP:)

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[D47-q] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Spielmann retort: 9.Na4 Main line: 11.dxc5 Bxc5 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Na4 c5 10.Nxc5 Nxc5 11.dxc5 Bxc5 =/+    (TPOP:)

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[D47-r] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Spielmann retort: 9.Na4 Main line: 12.0-0 0-0 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Na4 c5 10.Nxc5 Nxc5 11.dxc5 Bxc5 12.0-0 0-0 =/unclear    (TPOP:)

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[D47-s] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Botvinnik retort: 9.Ne4! 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Ne4! +/=    (TPOP:)

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[D47-t] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Botvinnik retort: 9.Ne4! Flohr System: 9...Nxe4?! 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Ne4! Nxe4?! 10.Bxe4 +/=    (TPOP:)

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[D47-u] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Botvinnik retort: 9.Ne4! Flohr System: 9...Nxe4?! Main line: 10...Bb7 (Grushevsky) 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Ne4! Nxe4?! 10.Bxe4 Bb7 (11.0-0) +/=    (TPOP:) (WSTA: (White Strong Advantage))

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[D47-v] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Botvinnik retort: 9.Ne4! Flohr System: 9...Nxe4?! Main line: 11.Qa4! (Pal C Benko) 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Ne4! Nxe4?! 10.Bxe4 Bb7 11.Qa4! +/=    (TPOP:) (WSTA: (White Strong Advantage))

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[D47-w] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Botvinnik retort: 9.Ne4! Eliskases System: 9...Be7 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Ne4! Be7 =/unclear    (TPOP:)

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[D47-x] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Botvinnik retort: 9.Ne4! Eliskases System: 9...Be7! 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Ne4! Be7!? 10.Nxf6+ Nxf6 11.e4! +/=   (TPOP:)   (11.e4! (Botvinnik, 1933))

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[D47-y] - QGD: semi-Slav, neo-Meran (variation) Lundi variation: 8.Bd3 b4 Botvinnik retort: 9.Ne4! Main line: 12.0-0 0-0 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 9.Ne4! Be7!? 10.Nxf6+ Nxf6 11.e4! Bb7 12.0-0 O-0 (13.e5!?) +/=   (TPOP:)   (11.e4! (Botvinnik, 1933))

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[D47-z] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 =/unclear    (RMOP:) (see also: D48)

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[D47-a*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Gligoric retort: 9.a3 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.a3 =   (QPOP: (Quasi Pure Opening)) (see also: D20, D45, D46)

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[D47-b*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Glass retort: 9.e4!? 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!? (a6) +/=   (TPOP: (Totally Pure Opening))

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[D47-c*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Glass retort: 9.e4!? 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 +/=   (TPOP: (Totally Pure Opening))

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[D47-d*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Glass retort: 9.e4!? Makarczyk System: 11.e5 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 11.e5 +/=     (TPOP:)

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[D47-e*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Glass retort: 9.e4!? Makarczyk System: 11.e5 Nd5 12.Nxc5 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 11.e5 Nd5 12.Nxc5 =     (TPOP:)

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[D47-f*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Glass retort: 9.e4!? Trifunovic System: 11.e5 Nd5 12.0-0 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 11.e5 Nd5 12.0-0 +/=     (TPOP:)

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[D47-g*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Glass retort: 9.e4!? Trifunovic System: 12.0-0 cxd4 13.Re1 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 11.e5 Nd5 12.0-0 cxd4 13.Re1 +/=     (TPOP:)

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[D47-h*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Northrup retort: 9.0-0 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.0-0 +/=   (RMOP:) (see also: D48)

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[D47-i*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Northrup retort: 9.0-0 Wade System: 9...b4 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.0-0 b4 +/=     (TPOP:)

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[D47-j*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Northrup retort: 9.0-0 Wade System: 9...b4 10.Ne4 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.0-0 b4 10.Ne4 +/=     (TPOP:)

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[D47-k*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Northrup retort: 9.0-0 Wade System: 9...b4 10.Ne4 Be7 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.0-0 b4 10.Ne4 Be7 +/=     (TPOP:)

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[D47-l*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Main Line: 11.Nxf6+ Nxf6 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.0-0 b4 10.Ne4 Be7 11.Nxf6+ Nxf6 +/=     (TPOP:)

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[D47-m*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Main Line: 11.Nxf6+ Nxf6 12.e4 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.0-0 b4 10.Ne4 Be7 11.Nxf6+ Nxf6 12.e4 +/=     (TPOP:)

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[D47-n*] - QGD: semi-Slav, Meran (variation) Wade variation: 8.Bd3 Bb7 Main Line: 11.Nxf6+ Nxf6 12.e4 0-0 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.0-0 b4 10.Ne4 Be7 11.Nxf6+ Nxf6 12.e4 0-0 +/=     (TPOP:)

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