Sicilian Defense: Four Knights Variation
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6
Main Transpositions
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 d6 to 2. .. d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e6
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 d6 to 2. .. d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. g3 e6
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bg5 d6 to 2. .. d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6
Most Popular
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 (858/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 (863/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 (894/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 (503/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 (562/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 (592/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ (593/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 (596/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 (708/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 (1749/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 (585/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 (592/M). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 (3454/M). More: dbcn ccoe c365
TCEC Games
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 (1cp, 894/M, TCEC +1=6-1). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O h6 12. Bf4 d4 (21cp, 21/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. Bf4 Nxe4 8. Qf3 d5 (0cp, 19/M, TCEC +2=0-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 (5cp, 708/M, TCEC +1=5-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bc5 7. Nd6+ Ke7 8. Bf4 e5 (13cp, 22/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. Bd3 Bb4 (93cp, 38/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 (1cp, 585/M, TCEC +1=0-1). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Bb4 7. O-O Bxc3 8. bxc3 Nxe4 9. Nxc6 bxc6 (122cp, 3/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Bb4 (1cp, 200/M, TCEC +0=2-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. a3 a6 (50cp, 47/M, TCEC +1=1-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 d5 8. exd5 Nxd5 (104cp, 25/M, TCEC +2=4-0). Games. More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 (2cp, 3454/M, TCEC +1=0-1). Games. More: dbcn ccoe c365
Biased Popular Lines
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Nd5 Nxd5 9. exd5 exf4 10. dxc6 bxc6 11. Qf3 (224cp, -117cp; 7/M, 99%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Nd5 (107cp, -108cp; 12/M, 1%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O d4 12. Ne2 Qd5 13. Nf4 Qd6 14. Nh5 Nxh5 (79cp, -58cp; 10/M, 66%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 O-O (121cp, -111cp; 21/M, 3%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 a6 7. Nd6+ Bxd6 8. Qxd6 Qe7 (150cp, -14cp; 19/M, 80%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 a6 (136cp, -135cp; 22/M, 1%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. c4 Bb4+ 11. Ke2 Ba6 (201cp, -201cp; 27/M, 28%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qa5+ 10. Bd2 Qb6 11. Bd3 Be7 (85cp, -35cp; 8/M, 55%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 f5 9. exf6 Nxf6 10. Nd6+ Bxd6 11. Qxd6 Ba6 (80cp, -51cp; 9/M, 27%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qa5+ 9. c3 f5 (75cp, -72cp; 8/M, 38%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Ba6 (180cp, -180cp; 8/M, 2%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. Bd3 Bb4 (92cp, -90cp; 38/M, 35%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. f3 d5 8. Nxc6 bxc6 9. e5 (69cp, -40cp; 12/M, 52%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Bb4 7. O-O O-O (68cp, -66cp; 19/M, 24%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Bb4 7. O-O a6 (141cp, -139cp; 9/M, 12%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Bb4 7. Bg5 (129cp, -131cp; 12/M, 6%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 d5 8. exd5 Nxd5 (93cp, -85cp; 25/M, 99%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bg5 Bb4 7. Nxc6 bxc6 8. e5 (160cp, -161cp; 10/M, 41%). More: dbcn ccoe c365
Lines with Disagreement to Human Master Play
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Nd5 Nxd5 9. exd5 exf4 10. dxc6 bxc6 11. Qf3 (224cp, -117cp; 7/M, 99%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O d4 12. Ne2 Qd5 13. Nf4 Qd6 14. Nh5 Nxh5 (79cp, -58cp; 10/M, 66%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O d4 12. Ne2 Re8 13. Bg5 Re5 (131cp, -120cp; 5/M, 39%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O h6 12. Bf4 d4 13. Nb5 Nd5 (134cp, -115cp; 6/M, 80%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. Nd6+ Ke7 8. Bf4 Qa5 (89cp, -89cp; 5/M, 22%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. c4 Bb4+ 11. Ke2 f5 12. Nf2 Bc5 (107cp, -107cp; 7/M, 21%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. c4 Bb4+ 11. Ke2 Ba6 (201cp, -201cp; 27/M, 28%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. c4 Ne3 11. Qd3 Bb4+ 12. Bd2 O-O 13. Rc1 Nxf1 (189cp, -167cp; 5/M, 48%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 f5 10. exf6 Nxf6 (150cp, -94cp; 5/M, 64%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 f5 9. exf6 Nxf6 10. Nd6+ Bxd6 11. Qxd6 Qe7 (102cp, -73cp; 7/M, 20%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. Bd3 Bb4 (92cp, -90cp; 38/M, 35%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. Bd3 d5 8. Nxc6 bxc6 9. exd5 cxd5 10. O-O O-O 11. Bd2 (66cp, -64cp; 6/M, 62%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. Bd3 d5 8. Nxc6 bxc6 9. exd5 cxd5 10. Bd2 (66cp, -64cp; 6/M, 30%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. Bd3 d5 8. Nxc6 bxc6 9. e5 d4 10. exf6 dxc3 (96cp, -96cp; 7/M, 47%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. Bd3 a6 8. O-O O-O (126cp, -98cp; 5/M, 43%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. f3 d5 8. Bb5 Bd7 9. O-O (193cp, -191cp; 6/M, 37%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Bb4 7. O-O O-O (68cp, -66cp; 19/M, 24%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Bb4 7. Nxc6 bxc6 8. O-O a6 (204cp, -203cp; 5/M, 60%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 d5 8. exd5 Nxd5 9. O-O Bxc3 (181cp, -88cp; 6/M, 41%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 d5 8. exd5 Nxd5 9. Nxc6 bxc6 10. O-O Bxc3 (181cp, -179cp; 6/M, 103%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 d5 8. exd5 Nxd5 (93cp, -85cp; 25/M, 99%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Bb4 7. Bg2 O-O 8. O-O a6 (62cp, -61cp; 6/M, 57%). More: dbcn ccoe c365
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bg5 Bb4 7. Nxc6 bxc6 8. e5 (160cp, -161cp; 10/M, 41%). More: dbcn ccoe c365
Latest dbcn data: 2025-12-19