Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O

The Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation is a chess opening classified as ECO D40, reached after 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O. It is a line of the Queen's Gambit Declined. White is to move. 1 named line continues from this position.

This exact move order didn't appear in our sample of 12.6 million Lichess games: it's a rare line.

Engine evaluation: +0.37 (Stockfish, depth 32; best line 8. dxc5 Bxc5 9. cxd5 exd5 10. h3 Re8)

ECO

D40

Moves

14 plies

FEN

r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 5 8

PGN

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O

Analyse with Stockfish · Board image (SVG) · Open on Lichess

Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.