Ruy Lopez: Exchange Variation, Keres Variation

The Ruy Lopez: Exchange Variation, Keres Variation is a chess opening classified under ECO code C68 in the Open Games & French Defense family, beginning with 1.e4 e5 or 1.e4 e6, including the Italian Game, Ruy Lopez, and French Defense. It is reached after 5 moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3. The resulting position leaves black to move.