Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin

The Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin is a chess opening classified under ECO code C49 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 8 moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7. The resulting position leaves white to move.