開局

Catalan Opening: Open Defense, Classical Line

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Be7 6.O-O O-O 7.Ne5 Nc6 8.Nxc6 bxc6
頂尖棋手