Petrov's Defense

50 named lines, ECO C42–C43. The main position arises after1. e4 e5 2. Nf3 Nf6.

Line	Games	White / draw / Black
Petrov's Defense (2. Nf3 Nf6) C42 · 1. e4 e5 2. Nf3 Nf6	202,392	51%45%
Petrov's Defense (2… Nf6 3. Nxe5) C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5	58,711	51%45%
Italian Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Bc4	35,434	51%45%
Modern Attack (2… Nf6 3. d4) C43 · 1. e4 e5 2. Nf3 Nf6 3. d4	15,258	53%43%
Three Knights Game C42 · 1. e4 e5 2. Nf3 Nf6 3. Nc3	71,555	51%45%
Petrov's Defense (3. Nxe5 d6) C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6	14,171	49%45%
Damiano Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4	13,277	59%36%
Modern Attack (3. d4 exd4) C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 exd4	6,502	52%44%
Modern Attack, Symmetrical Variation C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 d5	765	55%41%
Stafford Gambit C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6	18,434	46%51%
Petrov's Defense (3… d6 4. Nf3) C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3	11,450	50%44%
Cochrane Gambit C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7	1,189	50%47%
Karklins-Martinovsky Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nd3	340	44%49%
Modern Attack, Center Variation C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3	1,042	51%42%
Moody Gambit C42 · 1. e4 e5 2. Nf3 Nf6 3. Qe2 Nc6 4. d4	31	65%32%
Paulsen Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nc4	843	48%48%
Petrov's Defense (4. Nf3 Nxe4) C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4	10,566	49%44%
Damiano Variation, Kholmov Gambit C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Qe2 Qe7	2,181	53%40%
Modern Attack, Murrey Variation C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 Nc6	58	34%13%53%
Stafford Gambit Accepted (4. Nxc6 dxc6) C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6	14,721	44%52%
Classical Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4	2,771	50%43%
Cochrane Gambit, Bishop Check Line C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. Bc4+	641	50%46%
Cochrane Gambit, Center Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. d4	252	52%44%
Cozio Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2	3,222	49%45%
French Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3	1,307	48%46%
Kaufmann Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. c4	84	43%49%
Millennium Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Bd3	308	46%49%
Modern Attack, Center Attack C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4	317	48%47%
Modern Attack, Steinitz Variation C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2	9	33%67%
Modern Attack, Tal Gambit C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Bb5	–
Nimzowitsch Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3	1,771	51%42%
Classical Attack, Closed Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 Nf6	67	60%34%
Stafford Gambit Accepted (5. Nc3 Bc5) C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. Nc3 Bc5	4,045	40%57%
Stafford Gambit Accepted (5. d3 Bc5) C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. d3 Bc5	5,466	45%51%
Classical Attack, Marshall Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6	722	49%44%
Classical Attack, Mason-Showalter Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6	307	45%46%
Modern Attack, Bardeleben Variation C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6	1	100%
Classical Attack, Mason Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O	158	42%49%
Modern Attack, Trifunovic Variation C43 · 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Bd6 6. O-O O-O 7. c4 Bxe5	18	61%39%
Classical Attack, Chigorin Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1	21	57%43%
Classical Attack, Jaenisch Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4	83	46%47%
Classical Attack, Staunton Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6	262	53%40%
Classical Attack, Tarrasch Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4	1	100%
Classical Attack, Chigorin Variation, Browne Attack C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. cxd5	17	47%18%35%
Classical Attack, Chigorin Variation, Main Line C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. Be2	21	48%48%
Classical Attack, Marshall Variation, Chinese Gambit C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6 9. Re1 Bg4	1	100%
Classical Attack, Berger Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2	3	100%
Classical Attack, Krause Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. Re1 Bg4 9. c3 f5 10. c4	–
Classical Attack, Maróczy Variation C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. c4 Bh4	–
Classical Attack, Marshall Trap C42 · 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+	–