Ruy Lopez: Cozio Defense, Paulsen Variation

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3 g6

ECO C60

The Ruy Lopez: Cozio Defense, Paulsen Variation is a chess opening line in the Ruy Lopez complex, reached after 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3 g6.

It is catalogued under code C60 in the Encyclopaedia of Chess Openings (ECO).

The defining move g6 is chosen by Black on move 4.

Study this line with a grandmaster

This position is covered in the Beat the Ruy Lopez 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.