OPENINGS THEORY
- ECO CODES BASE -

- E42 -

[E42-a] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points))

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[E42-b] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) Nc6

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[E42-c] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d6 (QDAL: c4,d4-d6,e6 (Queen double airlock))

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[E42-d] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d6 (QDAL: c4,d4-d6,e6 (Queen double airlock)) 6.a3 (Ba5)

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[E42-e] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) 0-0

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[E42-f] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) 0-0 6.a3 (cxd4) =

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[E42-g] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d5 (TA: c4,d4-c5,d5 (Tarrasch's anvil)) =/unclear

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[E42-h] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d5 (TA: c4,d4-c5,d5 (Tarrasch's anvil)) 6.a3 Ba5 =/unclear

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[E42-i] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d5 (TA: c4,d4-c5,d5 (Tarrasch's anvil)) 6.a3 cxd4 =/unclear

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[E42-j] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d5 (TA: c4,d4-c5,d5 (Tarrasch's anvil)) 6.a3 Bxc3+ 7.bxc3 =

1. «»

[E42-k] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d5 (TA: c4,d4-c5,d5 (Tarrasch's anvil)) 6.a3 Bxc3+ 7.Nxc3 =

1. «»

[E42-l] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d5 (TA: c4,d4-c5,d5 (Tarrasch's anvil)) 6.a3 Bxc3+ 7.Nxc3 cxd4 8.exd4 (dxc4) =

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[E42-m] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) d5 (TA: c4,d4-c5,d5 (Tarrasch's anvil)) 6.a3 Bxc3+ 7.Nxc3 cxd4 8.exd4 dxc4 9.Bxc4 Nc6 =

1. «»

[E42-n] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 =

1. «»

[E42-o] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 (Bxc3+) =

1. «»

[E42-p] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 =

1. «»

[E42-q] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Ng3 =

1. «»

[E42-r] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Qa4 =

1. «»

[E42-s] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.g3 =

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[E42-t] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Bd2 =

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[E42-u] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Bd2 0-0 =

1. «»

[E42-v] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Rb1 =

1. «»

[E42-w] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Rb1 Qe7 =

1. «»

[E42-x] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Rb1 Na6

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[E42-y] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Rb1 Na6 8.Qa4 +/=

1. «»

[E42-z] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) b6 6.a3 Ba5 7.Rb1 Na6 8.Bd2 (0-0) +/=

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[E42-a*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4

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[E42-b*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4

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[E42-c*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 Ne4

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[E42-d*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 0-0 =

1. «»

[E42-e*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 0-0 7.a3 =

1. «»

[E42-f*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 0-0 7.a3 Be7 8.Nf4 =

1. «»

[E42-g*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 0-0 7.a3 = Be7 8.d5 =

1. «»

[E42-h*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 0-0 7.a3 = Be7 8.d5 exd5 9.cxd5 Bc5 =

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[E42-i*] - NID: Nimzo-Indian: Rubinstein variation (5.Nge2) 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 0-0 7.a3 = Be7 8.d5 exd5 9.cxd5 Re8 (OF: (open file)) =

1. «»

[E42-j*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 +/=

1. «»

[E42-k*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.c5!? (0-0) +/=

1. «»

[E42-l*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.c5!? Ne4 +/=

1. «»

[E42-m*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.c5!? Ne4 8.Bd2 Nxd2 9.Qxd2 +/=

1. «»

[E42-n*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.c5!? Ne4 8.Bd2 Nxd2 9.Qxd2 a5 +/=

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[E42-o*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3

1. «»

[E42-p*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Bxc3+ 8.Nxc3 +/=

1. «»

[E42-q*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Bxc3+ 8.Nxc3 dxc4 9.Bxc4 (0-0) +/=

1. «»

[E42-r*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Bxc3+ 8.Nxc3 dxc4 9.Bxc4 Nc6 10.Be3 +/=

1. «»

[E42-s*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Bxc3+ 8.Nxc3 dxc4 9.Bxc4 Nc6 10.Be3 0-0 11.0-0 +/=

1. «»

[E42-t*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 /unclear

1. «»

[E42-u*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.cxd5 =/unclear

1. «»

[E42-v*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.Nf4 =/unclear

1. «»

[E42-w*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.Nf4 0-0 =/unclear

1. «»

[E42-x*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.Nf4 0-0 9.cxd5 Nxd5 +/=

1. «»

[E42-y*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.Nf4 0-0 9.cxd5 Nxd5 10.Ncxd5 exd5 +/=

1. «»

[E42-z*] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.Nf4 0-0 9.cxd5 Nxd5 10.Ncxd5 exd5 11.Bd3 +/=

1. «»

[E42-a**] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.c5 +/=

1. «»

[E42-b**] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.c5 0-0 +/=

1. «»

[E42-c**] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.c5 b6 +/=

1. «»

[E42-d**] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.c5 b6 9.b4 +/=

1. «»

[E42-e**] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.c5 b6 9.b4 0-0 +/=

1. «»

[E42-f**] - NID: Nimzo-Indian: Rubinstein (5.Nge2), main line 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (TL: (Tarrasch's lever)) 5.Nge2 (CP=d4,d5,e4 (critical points)) cxd4 6.exd4 d5 7.a3 Be7 8.c5 b6 9.b4 0-0 10.g3 +/=

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