All ECO Codes
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C42
C42
Petrov's Defence
Classical Attack, Maroczy Variation
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