About this opening
Semi-Slav Defense: Quiet Variation is an opening in the Encyclopedia of Chess Openings,
classified under code D30. 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 9 half-moves from the
starting position, with the move sequence 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2.
It belongs to the Semi-Slav Defense family. Within that family this is a sub-variation (the Quiet Variation line).
The opening sequence in prose form: 1.d4 d5, 2.c4 c6, 3.Nf3 Nf6, 4.e3 e6, 5.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.