Semi-Slav Defense: Anti-Noteboom, Stonewall Variation

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5

ECO D31

The Semi-Slav Defense: Anti-Noteboom, Stonewall Variation is a chess opening line in the Semi-Slav Defense complex, reached after 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5.

It is catalogued under code D31 in the Encyclopaedia of Chess Openings (ECO).

The defining move f5 is chosen by Black on move 4.

One named continuation branches from this position: the Portisch Gambit.

Named variations

• Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit — ECO D31

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.