Czech Defense

The Czech Defense covered here begins with 1...d6, continues with ...Nf6, and is identified by ...c6 on Black's third move. The c7-pawn advances to c6, supports the d5-square, and also controls b5. Black builds a compact position before deciding how to challenge White's center.

The pawn on c6 creates routes for Black's queen to appear on a5, b6, or c7. Black often develops the b8-knight to d7 and the f8-bishop to e7, then seeks ...e5 or ...d5. These are central pawn breaks, pawn advances intended to attack or exchange White's central pawns and open lines for Black's pieces.

White has more space at first: the pawns on e4 and d4 control many central squares and leave more room for maneuvering. White can develop with Nf3 and Be3 or support expansion with f4, but should not assume Black's position is passive. If ...e5 or ...d5 is prepared well, White's center can open quickly. Unlike the better-known Pirc setup, another defense that also begins with 1...d6 and often continues with ...g6 and ...Bg7, the Czech prioritizes the c6 and d6 structure first.