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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