Nimzo Indian

[Black "E50"]{ Nimzo-Indian Defence
4.e3 e8g8, 5.Nf3, Without ...d5}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3

[Black "E51"]{ Nimzo-Indian Defence
4.e3 e8g8, 5.Nf3 d7d5}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5

{E51 Nimzo-Indian Defence
4.e3, Ragozin Variation}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 Nc6 7.O-O dxc4

[Black "E52"]{ Nimzo-Indian Defence
4.e3, Main line With ...b6}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 b6

[Black "E53"]{ Nimzo-Indian Defence
4.e3, Main line With ...c5}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5

{E53 Nimzo-Indian Defence
4.e3, Keres Variation}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O b6

{E53 Nimzo-Indian Defence
4.e3, Gligoric System With 7...Nbd7}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nbd7

[Black "E53"]{ Nimzo-Indian Defence
4.e3, Main line With ...c5}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5

{E53 Nimzo-Indian Defence
4.e3, Keres Variation}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O b6

{E53 Nimzo-Indian Defence
4.e3, Gligoric System With 7...Nbd7}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nbd7

[Black "E54"]{ Nimzo-Indian Defence
4.e3, Gligoric System With 7...dc}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4

{E54 Nimzo-Indian Defence
4.e3, Gligoric System, Smyslov Variation}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Qe7

[Black "E55"]{ Nimzo-Indian Defence
4.e3, Gligoric System, Bronstein Variation}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O dxc4 8.Bxc4 Nbd7

[Black "E56"] { Nimzo-Indian Defence
4.e3, Main line With 7...Nc6}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6

[Black "E57"]{ Nimzo-Indian Defence
4.e3, Main line With 8...dc and 9...cd}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 dxc4 9.Bxc4 cxd4

[Black "E58"]{ Nimzo-Indian Defence
4.e3, Main line With 8...Bxc3}
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6 8.a3 Bxc3 9.bxc3