Sicilian Defense: Chekhover Variation
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4
Main Transpositions
Most Popular
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O Be7 (603/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O (616/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 (682/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 (776/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 (774/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 (883/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 (1097/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 (1220/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 (1327/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 (1519/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 (1394/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 (604/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 (2359/M). More: dbcn ccoe c365
TCEC Games
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 h6 9. Bxf6 gxf6 10. O-O-O h5 (86cp, 0/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 (1cp, 1097/M, TCEC +5=1-2). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 (2cp, 1394/M, TCEC +2=6-3). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 Nc6 6. Qd3 g6 7. Nc3 Bg7 8. Be2 Nf6 9. O-O Bg4 (5cp, 1/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 e6 6. b3 Nf6 (25cp, 0/M, TCEC +0=0-1). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. Bg5 Nc6 6. Qd2 h6 7. Bh4 g5 8. Bg3 Bg7 (-15cp, 19/M, TCEC +0=4-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 (8cp, 604/M, TCEC +0=3-1). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Bd7 5. c4 Nc6 6. Qd2 Nf6 7. Nc3 g6 8. b3 Bg7 (15cp, 38/M, TCEC +1=2-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Bd7 5. c4 Nc6 6. Qd2 g6 7. Be2 Bg7 8. O-O Nf6 (28cp, 1/M, TCEC +1=0-0). Games. More: dbcn ccoe c365
Biased Popular Lines
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O h6 (119cp, -119cp; 9/M, 1%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e5 9. Qd3 Be7 (76cp, -15cp; 45/M, 68%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e5 9. Qd3 h6 (103cp, -42cp; 13/M, 20%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 h6 9. Bxf6 gxf6 10. O-O-O Qa5 (94cp, -28cp; 10/M, 60%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 h6 9. Bxf6 gxf6 (68cp, -5cp; 19/M, 94%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Bg5 (89cp, -89cp; 25/M, 2%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Nf6 6. e5 Qa5+ 7. Nc3 Qxb5 8. Nxb5 Nxd4 9. Nfxd4 dxe5 10. Nc7+ (125cp, -85cp; 7/M, 89%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 Nc6 6. Qe3 g6 7. h3 Bg7 8. Be2 Nf6 9. O-O O-O 10. Nc3 Bd7 (79cp, -69cp; 9/M, 17%). More: dbcn ccoe c365
Lines with Disagreement to Human Master Play
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O Be7 10. Rhe1 O-O 11. Qd2 Qc7 12. Nd4 Rfd8 13. Kb1 Qb6 (70cp, -70cp; 5/M, 22%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O Be7 10. Rhe1 O-O 11. Qd2 Qc7 12. Nd4 Rfc8 13. Kb1 b5 14. f3 (67cp, -67cp; 6/M, 84%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. O-O-O Be7 10. Qd3 a6 11. Nd4 Qc7 (72cp, -71cp; 5/M, 40%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e5 9. Qd3 Be7 10. O-O-O Qc7 11. Bxf6 gxf6 (285cp, -155cp; 5/M, 97%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e5 9. Qd3 Be7 10. O-O-O Qc7 (130cp, -100cp; 6/M, 21%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 e5 8. Qd3 Nf6 (61cp, -59cp; 17/M, 30%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Nf6 6. e5 Qa5+ 7. Nc3 Qxb5 8. Nxb5 Nxd4 9. Nfxd4 dxe5 10. Nc7+ (125cp, -85cp; 7/M, 89%). More: dbcn ccoe c365
Latest dbcn data: 2025-12-19