Semi-Slav Defense: Marshall Gambit, Forgotten Variation

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Nc3

ECO D31

The Semi-Slav Defense: Marshall Gambit, Forgotten Variation is a chess opening line in the Semi-Slav Defense complex, reached after 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Nc3.

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

The defining move Nc3 is chosen by White on move 6.

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.