Four Knights Game: Spanish Variation, Gunsberg Counterattack

1.e4 e5 2.Nf3 Nf6 3.Nc3 Nc6 4.Bb5 Bb4 5.O-O O-O 6.Nd5 Nxd5 7.exd5 e4

ECO C49

The Four Knights Game: Spanish Variation, Gunsberg Counterattack is a chess opening line in the Four Knights Game complex, reached after 1.e4 e5 2.Nf3 Nf6 3.Nc3 Nc6 4.Bb5 Bb4 5.O-O O-O 6.Nd5 Nxd5 7.exd5 e4.

It is catalogued under code C49 in the Encyclopaedia of Chess Openings (ECO).

The defining move e4 is chosen by Black on move 7.

Study this line with a grandmaster

This position is covered in the Beat the Petroff 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.