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

ECO D40

The Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation is a chess opening line in the Queen's Gambit Declined complex, 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 catalogued under code D40 in the Encyclopaedia of Chess Openings (ECO).

The defining move O-O is chosen by Black on move 7.

Study this line with a grandmaster

This position is covered in the Opening Tricks Hall of Fame course: a GM-authored repertoire you study move by move, then practice against a human-like AI opponent.

Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.