1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5

Ruy López Opening: Morphy Defense, Columbus Variation, 4…Nf6 5.O-O b5

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5

Main Transpositions

Most Popular

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 d6 (620/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 (945/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 (1511/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 (503/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 (585/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 (1081/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 (973/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 (3732/M). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 (3567/M). More: dbcn ccoe c365

TCEC Games

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 d6 8. c3 O-O 9. Nbd2 Na5 10. Bc2 c5 (1cp, 100/M, TCEC +1=0-1). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 d6 8. a4 b4 9. a5 O-O 10. Qe2 Rb8 (1cp, 0/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 d6 8. a4 Bg4 (6cp, 27/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 O-O 8. Nc3 Na5 (114cp, 0/M, TCEC +2=0-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 Bb7 8. Nc3 O-O 9. a3 Nd4 10. Ba2 Nxf3+ (21cp, 3/M, TCEC +1=0-1). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d3 Bb7 8. Nc3 O-O (9cp, 97/M, TCEC +1=0-1). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 O-O 8. c3 d6 (1cp, 298/M, TCEC +1=4-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 O-O 8. a4 Bb7 (1cp, 6/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 d6 8. c3 Na5 (2cp, 36/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 d6 8. c3 Bg4 (34cp, 22/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 (-1cp, 485/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4 (4cp, 34/M, TCEC +1=5-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 (11cp, 1511/M, TCEC +3=5-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. d3 Bb6 (13cp, 19/M, TCEC +0=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. a4 Rb8 9. d4 Bb6 10. a5 Ba7 (1cp, 63/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. a4 Bg4 (13cp, 44/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. Re1 O-O 9. d4 Bb6 10. Bg5 h6 11. Bh4 Bg4 (98cp, 0/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. Re1 O-O (1cp, 44/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 (2cp, 503/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. d3 d6 8. Nc3 Bg4 (4cp, 9/M, TCEC +0=1-1). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. a4 Rb8 8. axb5 axb5 (1cp, 57/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 (2cp, 1081/M, TCEC +3=12-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. d3 Bc5 8. a4 d6 (31cp, 24/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. d3 Bd6 8. c3 O-O (20cp, 22/M, TCEC +3=3-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. Re1 Bc5 8. c3 d6 9. d4 Bb6 10. Bg5 h6 11. Bh4 Qd7 (101cp, 12/M, TCEC +5=2-1). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. Re1 Bc5 8. c3 d6 (7cp, 226/M, TCEC +2=1-1). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. Re1 Bc5 (6cp, 294/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 (11cp, 973/M, TCEC +2=6-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. c3 Be7 8. h3 O-O (2cp, 16/M, TCEC +0=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. c3 Be7 8. h3 Na5 9. Bc2 c5 10. d4 Qc7 (86cp, 6/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Nxe4 (88cp, 78/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 (2cp, 3567/M, TCEC +0=0-2). Games. More: dbcn ccoe c365

Biased Popular Lines

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 O-O 8. c3 d6 9. Rd1 Na5 10. Bc2 c5 11. d4 Qc7 12. d5 c4 (117cp, -59cp; 12/M, 22%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 O-O 8. c3 d6 9. Rd1 Na5 10. Bc2 c5 11. d4 Qc7 12. d5 Nc4 (79cp, -21cp; 9/M, 17%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 (79cp, -79cp; 32/M, 98%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Qe2 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 (85cp, -77cp; 16/M, 84%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d4 exd4 8. e5 Ne4 9. Bd5 Nc5 10. Nxd4 Bb7 (297cp, -42cp; 19/M, 97%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d4 exd4 8. e5 Ne4 (255cp, -52cp; 28/M, 83%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. d4 exd4 (203cp, -192cp; 40/M, 27%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. d4 exd4 9. cxd4 Bb6 (122cp, -11cp; 24/M, 86%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. d4 exd4 (111cp, -109cp; 28/M, 9%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 O-O 8. d4 exd4 9. cxd4 Bb6 (362cp, -194cp; 12/M, 59%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 O-O (166cp, -164cp; 46/M, 7%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 Nxe4 8. d4 exd4 (129cp, -23cp; 10/M, 86%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 Nxe4 (106cp, -104cp; 16/M, 2%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. Nxe5 Nxe5 8. d4 Bxd4 9. Qxd4 Nc6 (168cp, -168cp; 10/M, 12%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. Re1 Bc5 8. c3 d6 9. d4 Bb6 10. Bg5 h6 11. Bh4 Qd7 (94cp, -94cp; 12/M, 20%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. Re1 Bc5 8. c3 Ng4 (229cp, -223cp; 8/M, 3%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. c3 Na5 8. Bc2 c5 9. d4 Qc7 (69cp, -22cp; 8/M, 84%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Nxe4 7. Re1 d5 (98cp, -18cp; 15/M, 63%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Nxe4 (80cp, -78cp; 78/M, 2%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 h6 (99cp, -97cp; 15/M, 0%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d5 7. exd5 Nxd5 (173cp, -40cp; 10/M, 138%). More: dbcn ccoe c365
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d5 (133cp, -131cp; 8/M, 0%). More: dbcn ccoe c365

Lines with Disagreement to Human Master Play

Latest dbcn data: 2025-12-19

page revision: 26, last edited: 18 Dec 2025 23:13

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Chess Openings for Engine Competition

Opening lines that are known in Master play and that are biased for one side

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