Semi-Slav Defense

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6

ECO D43

The Semi-Slav Defense is a chess opening reached after 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6, catalogued under code D43 in the Encyclopaedia of Chess Openings (ECO).

The defining move e6 is chosen by Black on move 4.

21 named continuations branch from this position, including the Quiet Variation and the Accelerated Move Order.

Named variations

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This position is covered in the Slav Defense 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.