About this opening
Slav Defense: Breyer Variation is an opening in the Encyclopedia of Chess Openings,
classified under code D11. 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 7 half-moves from the
starting position, with the move sequence 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2.
It belongs to the Slav Defense family. Within that family this is a sub-variation (the Breyer Variation line).
The opening sequence in prose form: 1.d4 d5, 2.c4 c6, 3.Nf3 Nf6, 4.Nbd2. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.