Library/Openings/Slav Defense/Czech Variation/Classical System ECO D18
Opening· 11 plies

Slav Defense: Czech Variation, Classical System

An entry in the Encyclopedia of Chess Openings (ECO D18), reached after 11 half-moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3.

Slav Defense: Czech Variation, Classical System ECO D18
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Black rook
Black knight
Black queen
Black king
Black bishop
Black rook
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black knight
Black bishop
White pawn
Black pawn
White pawn
White knight
White pawn
White knight
White pawn
White pawn
White pawn
White pawn
White rook
White bishop
White queen
White king
White bishop
White rook
11/11
  1. 1.
  3. 2.
  5. 3.
  7. 4.
  9. 5.
  11. 6.
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About this opening

Slav Defense: Czech Variation, Classical System is an opening in the Encyclopedia of Chess Openings, classified under code D18. 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 11 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 6. e3.

It belongs to the Slav Defense family. Within that family this is a level-2 branch (the Czech Variation → Classical System line). The immediate parent line is Slav Defense: Czech Variation, transitioned via 6.e3.

The opening sequence in prose form: 1.d4 d5, 2.c4 c6, 3.Nf3 Nf6, 4.Nc3 dxc4, 5.a4 Bf5, 6.e3. From this position exactly one named continuation is recorded in the encyclopaedia.