1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O

Nimzo-Indian Defense: Classical Variation, 4…O-O

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O

Main Transpositions

Most Popular

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 (743/M). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 (966/M). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 (1189/M). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 (1949/M). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ (1965/M). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 (1979/M). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 (569/M). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O (3121/M). More: dbcn ccoe

TCEC Games

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 d6 (7cp, 43/M, TCEC +0=4-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 c5 (10cp, 24/M, TCEC +0=2-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. Nf3 d6 9. Nd2 Nbd7 10. f3 d5 (8cp, 3/M, TCEC +0=0-1). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. Nf3 c5 (0cp, 5/M, TCEC +1=0-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Ba6 8. e3 d6 (18cp, 46/M, TCEC +2=0-1). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Ba6 8. Qf3 Nc6 (25cp, 27/M, TCEC +1=3-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Ba6 8. Nf3 d6 (11cp, 15/M, TCEC +0=2-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Ba6 8. g3 d5 (0cp, 0/M, TCEC +0=0-1). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 h6 8. Bh4 Bb7 (7cp, 37/M, TCEC +1=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 h6 8. Bh4 c5 (2cp, 7/M, TCEC +1=2-2). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 c5 8. dxc5 bxc5 (4cp, 47/M, TCEC +1=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Nf3 Bb7 8. e3 d6 (4cp, 86/M, TCEC +0=2-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Nf3 Bb7 8. e3 h6 (10cp, 5/M, TCEC +0=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Nf3 Bb7 8. g3 d5 (0cp, 11/M, TCEC +1=0-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Nf3 Bb7 8. g3 Qe7 (10cp, 2/M, TCEC +0=0-1). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 (0cp, 1189/M, TCEC +2=11-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d5 (1cp, 259/M, TCEC +1=0-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d6 7. f3 Qe8 8. e4 (-107cp, 8/M, TCEC +1=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d6 7. f3 Qe8 (107cp, 13/M, TCEC +0=2-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. Nh3 d6 (70cp, 28/M, TCEC +1=0-1). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. Nf3 b6 (18cp, 28/M, TCEC +1=3-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. g3 b6 (33cp, 18/M, TCEC +1=3-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5 (16cp, 110/M, TCEC +0=2-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 d5 6. a3 Bxc3+ (0cp, 27/M, TCEC +1=0-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d5 6. e5 Ne4 (1cp, 190/M, TCEC +1=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d6 6. a3 Bxc3+ 7. bxc3 e5 8. Bd3 c5 (39cp, 9/M, TCEC +0=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d6 6. e5 dxe5 7. dxe5 Ng4 8. Nf3 Nc6 (55cp, 9/M, TCEC +0=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d6 6. Bd3 Nc6 7. Ne2 Ba5 8. a3 Bb6 (3cp, 1/M, TCEC +0=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d6 6. Bd3 Nc6 (16cp, 7/M, TCEC +0=1-0). Games. More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Bg5 h6 6. Bh4 c5 7. e3 cxd4 8. exd4 Nc6 (-1cp, 10/M, TCEC +0=0-1). Games. More: dbcn ccoe

Biased Popular Lines

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 d5 10. e3 Nbd7 11. cxd5 exd5 12. Bd3 Re8 (93cp, -11cp; 14/M, 65%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 d5 10. e3 Nbd7 11. cxd5 exd5 (81cp, -76cp; 17/M, 13%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 d6 (81cp, -81cp; 14/M, 1%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d6 7. f3 Qe8 (107cp, -98cp; 13/M, 49%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. Nh3 d6 (70cp, -15cp; 28/M, 54%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. Nh3 b6 9. f3 Nf6 10. e3 Bb7 (127cp, -54cp; 9/M, 108%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. Nh3 b6 (88cp, -33cp; 12/M, 24%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. Nh3 Nc6 (101cp, -46cp; 10/M, 19%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. e3 b6 9. Bd3 Bb7 (84cp, -77cp; 12/M, 103%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 f5 8. e3 b6 (79cp, -39cp; 35/M, 92%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Be7 (147cp, -147cp; 13/M, 0%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 b6 6. e4 d5 7. e5 Ne4 8. Bd3 Bb7 (239cp, -12cp; 13/M, 88%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 b6 6. e4 d5 (226cp, -92cp; 21/M, 43%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 b6 6. e4 Bb7 (167cp, -33cp; 14/M, 30%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 b6 (134cp, -134cp; 105/M, 18%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d5 6. e5 Ne4 7. a3 Bxc3+ 8. bxc3 c5 9. Bb2 (79cp, -79cp; 9/M, 28%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 Bxc3+ (93cp, -91cp; 15/M, 4%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Bg5 d6 6. e3 Nbd7 (77cp, -58cp; 9/M, 60%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Bg5 b6 (102cp, -102cp; 14/M, 6%). More: dbcn ccoe

Lines with Disagreement to Human Master Play

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 d5 10. e3 Nbd7 11. cxd5 exd5 12. Bd3 Re8 13. Ne2 c5 14. O-O Qe7 15. Bf2 Rac8 (154cp, -65cp; 7/M, 73%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Ba6 8. Qf3 Nc6 9. e3 Bb7 (86cp, -61cp; 7/M, 29%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d6 7. f3 Qe8 (107cp, -98cp; 13/M, 49%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 b6 6. e4 d5 (226cp, -92cp; 21/M, 43%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 b6 6. e4 Bb7 7. Bd3 d5 (239cp, -72cp; 6/M, 44%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d5 6. e5 Ne4 7. a3 Bxc3+ 8. bxc3 c5 9. Bb2 (79cp, -79cp; 9/M, 28%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 c5 6. e5 cxd4 7. a3 dxc3 (171cp, -149cp; 6/M, 51%). More: dbcn ccoe
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Bg5 d6 6. e3 Nbd7 (77cp, -58cp; 9/M, 60%). More: dbcn ccoe

Latest dbcn data: 2022-06-25

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