Slav Defense: Czech Variation

An entry in the Encyclopedia of Chess Openings (ECO D17), reached after 10 half-moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5.

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About this opening

Slav Defense: Czech Variation is an opening in the Encyclopedia of Chess Openings, classified under code D17. ECO group D (D00–D99) covers closed games and semi-closed games beginning 1.d4 d5, covering the Queen's Gambit, Slav, Grünfeld and related queen-pawn structures. This particular variation is reached after 10 half-moves from the starting position, with the move sequence 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5.

It belongs to the Slav Defense family. Within that family this is a sub-variation (the Czech Variation line).

The opening sequence in prose form: 1.d4 d5, 2.c4 c6, 3.Nf3 Nf6, 4.Nc3 dxc4, 5.a4 Bf5. From this position 3 named continuations are recorded in the encyclopaedia, each leading to a distinct theoretical line.