OPENINGS THEORY
- ECO CODES BASE -

- E40 -



[E40-a] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3


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[E40-b] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Ne4?!


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[E40-c] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 d6


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[E40-d] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 c6


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[E40-e] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 c6 5.Bd3


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[E40-f] - NID: Nimzo-
Indian: 4.e3
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 c6 5.Bd3 d6 6.Ne2


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[E40-g] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 c6 5.Bd3 d6 6.Ne2 Nbd7
7.0-0 0-0 +/=


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[E40-h] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Bxc3+ 5.bxc3 (FM) (b6)


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[E40-i] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Bxc3+ 5.bxc3 (FM) d6


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[E40-j] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Bxc3+ 5.bxc3 (FM) d6
6.Bd3 c5 (TALV: d4-c5 (Tarrasch's
lever))


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[E40-k] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 d5 (QGLV: c4-d5 (Queen
gambit lever))


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[E40-l] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 d5 (QGLV: c4-d5 (Queen
gambit lever)) 5.Ce2?!


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[E40-m] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 d5 (QGLV: c4-d5 (Queen
gambit lever) 5.a3


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[E40-n] - NID: Nimzo-
Indian: 4.e4 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 d5 (QGLV: c4-d5 (Queen
gambit lever) 5.a3 Be7


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[E40-o] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 d5 (QGLV: c4-d5 (Queen
gambit lever)) 5.a3 Be7 6.Nf3
Nbd7 =


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[E40-p] - NID: Nimzo-
Indian: 4.e3 variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 d5 (QGLV: c4-d5 (Queen
gambit lever)) 5.a3 Be7 6.Nf3
Nbd7 7.b4 0-0 =


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[E40-q] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation))


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[E40-r] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.g3


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[E40-s] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd2


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[E40-t] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.a3 (Bxc3+
6.bxc3 (see: E24))


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[E40-u] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line))


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[E40-v] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever))


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[E40-w] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.d5 /unclear


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[E40-x] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.d5 e4!? +/=


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[E40-y] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.d5 Bxc3+ 7.bxc3 (Ne7) =


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[E40-z] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.Nge2 +/=


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[E40-a*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.Nge2 exd4 7.exd4 +/=


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[E40-b*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.Nge2 exd4 7.exd4 d5 +/=


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[E40-c*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.Nge2 d5 (QA: c4,d4-d5,e5
(Queen's anvil)) +/=


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[E40-d*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.Nge2 d5 (QA: c4,d4-d5,e5
(Queen's anvil)) 7.a3 (Bd6?! 8.c5
+/-) +/=


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[E40-e*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.Nge2 d5 (QA: c4,d4-d5,e5
(Queen's anvil)) 7.a3 Bf8 (WID:
g6,Bg7 (with the idea)) +/=


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[E40-f*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Bd3 (FL:
(free line)) e5 (QULV: d4-e5 (Queen's
lever)) 6.Nge2 d5 (QA: c4,d4-d5,e5
(Queen's anvil)) 7.a3 Be7 =


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[E40-g*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2


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[E40-h*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d6 (BIC:
d6,e6 (Black inferior centre))
+/=


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[E40-i*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))


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[E40-j*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 (Bd6?! c5 +/-) /unclear


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[E40-k*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Bf8 (WID: g6,Bg7 (with
the idea)) +/=


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«»


[E40-l*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Bf8 (WID: g6,Bg7 (with
the idea)) 7.cxd5 +/=


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«»


[E40-m*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7


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[E40-n*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5


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[E40-o*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Ng3


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[E40-p*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Ng3 0-0


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[E40-q*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Ng3 h5


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[E40-r*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Nf4!?


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[E40-s*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Nf4!? 0-0


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«»


[E40-t*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Nf4!? 0-0
9.Be2 Bf5


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«»


[E40-u*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Nf4!? Bf5


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«»


[E40-v*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Nf4!? Bf5
9.Qb3 =


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[E40-w*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Nf4!? Bf5
9.b4 Qd7 (WID: Qg4 (with the
idea)) =


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[E40-x*] - NID: Nimzo-Indian:
4.e3, Taimanov variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.e3 Nc6 (TNBF: (three Knights
basic formation)) 5.Nge2 d5 (QGLV:
c4-d5 (Queen gambit lever))
6.a3 Be7 7.cxd5 exd5 8.Nf4!? Bf5
9.b4 Qd7 (WID: Qg4 (with the
idea)) 10.Qb3 Rd8 =


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