OPENINGS THEORY
- ECO CODES BASE -

- E23 -



[E23-a] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 (TNBF: (three Knights
basic formation))


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[E23-b] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 (TNBF: (three Knights
basic formation)) 6.Bd2


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[E23-c] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 (TNBF: (three Knights
basic formation)) 6.Bd2 Bxc5 (7.e3)


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[E23-d] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 (TNBF: (three Knights
basic formation)) 6.Bd2 Bxc5 7.e3
0-0 8.Nf3 (FNBF: (four Knights
basic formation)) =


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[E23-e] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 (TNBF: (three Knights
basic formation)) 6.Bg5 (CP=d5
(critical point)) =


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[E23-f] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 (TNBF: (three Knights
basic formation)) 6.Bg5 (CP=d5
(critical point)) h6 7.Bxf6 Qxf6 =


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[E23-g] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation))


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«»


[E23-h] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Bxc5


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«»


[E23-i] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Bxc5
7.Bg5 Be7


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[E23-j] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) 0-0 =


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«»


[E23-k] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) 0-0
7.Bg5 h6 =


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[E23-l] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) =


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«»


[E23-m] - NID: Nimzo-
Indian: Spielmann, 5...Nc6
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 =


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«»


[E23-n] - NID: Nimzo-Indian:
Spielmann, San Remo variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxc5 =


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[E23-o] - NID: Nimzo-Indian:
Spielmann, San Remo variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxc5 8.Qc2 0-0
+/=


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[E23-p] - NID: Nimzo-Indian:
Spielmann, San Remo variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxc5 8.Qc2 f5 =


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[E23-q] - NID: Nimzo-Indian:
Spielmann, Staahlberg variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxc5 8.Qc2 f5
9.g3 =


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[E23-r] - NID: Nimzo-Indian:
Spielmann, Staahlberg variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxc5 8.Qc2 f5
9.g3 0-0 =


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[E23-s] - NID: Nimzo-Indian:
Spielmann, Karlsbad variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxd2 (8.Kxd2?)


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[E23-t] - NID: Nimzo-Indian:
Spielmann, Karlsbad variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxd2 8.Nxd2
Bxc5 =/unclear


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«»


[E23-u] - NID: Nimzo-Indian:
Spielmann, Karlsbad variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxd2 8.Nxd2
0-0 =/unclear


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«»


[E23-v] - NID: Nimzo-Indian:
Spielmann, Karlsbad variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxd2 8.Nxd2
f5 =/unclear


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[E23-w] - NID: Nimzo-Indian:
Spielmann, Karlsbad variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxd2 8.Nxd2
f5 9.g3 (Qa5!) =/+


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[E23-x] - NID: Nimzo-Indian:
Spielmann, Karlsbad variation
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
4.Qb3 (CD: a2-g8) c5 (TL: c5-d4)
5.dxc5 Nc6 6.Nf3 (FNBF: (four
Knights basic formation)) Ne4 (ACM:
(active move)) 7.Bd2 Nxd2 8.Nxd2
f5 9.e3 =


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