Ruy Lopez: Berlin Defense, Tarrasch Trap

The Ruy Lopez: Berlin Defense, Tarrasch Trap is a chess opening classified under ECO code C66 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 7 moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. O-O Be7 7. Re1 O-O. The resulting position leaves white to move.