OPENINGS THEORY
- ECO CODES BASE -

- D49 -

[D49-a] - QGD: semi-Slav, Meran, Blumenfeld variation 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

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[D49-b] - QGD: semi-Slav, Meran, Blumenfeld variation 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 Bf7

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[D49-c] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4

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[D49-d] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4 12.Nbxd4 Bb4+ (WCFP: (with compensation for the pawn))

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[D49-e] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4 12.Qa4

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[D49-f] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4 12.Qa4 Bb7 (13.Nbxd4 or 13.Nd6+) +/-

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[D49-g] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4 12.Qa4 Rb8 13.Nd6+ Bxd6 14.exd6 Qb6 (QASS: (Queens' attack on the same side))

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[D49-h] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4 12.Qa4 Ngxe5 (13.Nxe5 ) +/-

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[D49-i] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4 12.Qa4 Ngxe5 13.Nxe5 Nxe5 14.Nc7+

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[D49-j] - QGD: semi-Slav, Meran, Rabinovich variation 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 Ng4 12.Qa4 Ngxe5 13.Nxe5 Nxe5 14.Nd6+ Ke7 (CK: (centralized King)) + (AFM: (absolutly forced move))

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[D49-k] - QGD: semi-Slav, Meran, Sozin variation 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

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[D49-l] - QGD: semi-Slav, Meran, Sozin variation 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.Nbxd4?! =/+

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[D49-m] - QGD: semi-Slav, Meran, Sozin variation 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

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[D49-n] - QGD: semi-Slav, Meran, Stahlberg variation 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 13.Qf3

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[D49-o] - QGD: semi-Slav, Meran, Stahlberg variation 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 13.Qf3 Qa5+ (QAOS: (Queens' attack on opposite sides))

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[D49-p] QGD: semi-Slav, Meran, Stahlberg variation 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 13.Qf3 Qa5+ 14.Ke2 (CK: (centralized King))

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[D49-q] - QGD: semi-Slav, Meran, Stahlberg variation 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 13.Qf3 Bb4+ (COAT: (counter-attack))

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[D49-r] - QGD: semi-Slav, Meran, Stahlberg variation 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 13.Qf3 Bb4+ (COAT: (counter-attack)) 14.Ke2 (or Kd1) (CK)

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[D49-s] - QGD: semi-Slav, Meran, Stahlberg variation 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 13.Qf3 Bb4+ (COAT: (counter-attack)) 14.Ke2 (CK) Rb8 15.Qg3 (DAT: double attack)) (Qd6)

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[D49-t] - QGD: semi-Slav, Meran, Sozin variation, 13.Bxb5+ line 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 13.Bxb5+ Bd7 (FM: (forced move))

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[D49-u] - QGD: semi-Slav, Meran, Sozin variation 13.Bxb5+ line 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 13.Bxb5+ Bd7 (FM: (forced move)) 14.Nxd7 Qa5+ (COAT) 15.Bd2 (FM) Qxb5

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[D49-v] - QGD: semi-Slav, Meran, Sozin variation, 13.0-0 line 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 13.0-0 (SFP: (security for a pawn)

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[D49-w] - QGD: semi-Slav, Meran, Sozin variation, 13.0-0 line 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 13.0-0 (SFP: (security for a pawn) Qd5

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[D49-x] - QGD: semi-Slav, Meran, Sozin variation, 13.0-0 line 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 13.0-0 (SFP: (security for a pawn) Qd5 14.Qe2 (QACE: Queens' attack on the centre))

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[D49-y] QGD: semi-Slav, Meran, Rellstab attack 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 13.0-0 (SFP: (security for a pawn) Qd5 14.Qe2 (QACE) Ba6 15.Bg5

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[D49-z] QGD: semi-Slav, Meran, Rellstab attack 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 13.0-0 (SFP: (security for a pawn) Qd5 14.Qe2 (QACE) Ba6 15.Bg5 Be7 16.f4 0-0 (unclear)

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[D49-a*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM: forced move))

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[D49-b*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Bb7 (13.0-0) +/=

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[D49-c*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM: forced move))) Qb6 (13.0-0) +/=

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[D49-d*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) +/=

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[D49-e*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) 14.Qe2 (b4 15.0-0) +/=

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[D49-f*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) 14.Qe2 0-0 15.0-0 +/=

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[D49-g*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) 14.0-0 +/=

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[D49-h*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) 14.0-0 Nc5 +/=

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[D49-i*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) 14.0-0 Bb7

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[D49-j*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) 14.0-0 Bb7 15.Bf4 0-0

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[D49-k*] - QGD: semi-Slav, Meran, Blumenfeld variation 11...axb5 line 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 axb5 12.exf6 (FM) Qb6 13.fxg7 Bxg7 (FM) 14.0-0 Bb7 15.Bf4 0-0 16.Re1 (OF) Bd5 (SP: (strategic position))

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