Queen's Gambit Declined: Semi-Tarrasch Defense

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5

ECO D40

The Queen's Gambit Declined: Semi-Tarrasch Defense is a chess opening line in the Queen's Gambit Declined complex, reached after 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5.

It is catalogued under code D40 in the Encyclopaedia of Chess Openings (ECO).

The defining move c5 is chosen by Black on move 4.

10 named continuations branch from this position, including the Levenfish Variation and the Pillsbury Variation.

Named variations

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This position is covered in the Catalan Opening 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.