Chess puzzle (Advantage)
Opening: Four_Knights_Game, Four_Knights_Game_Spanish_Variation
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 d6 5. Bxc6+ bxc6 6. O-O Be7 7. d4 O-O 8.
dxe5 dxe5 9. Qxd8 Rxd8 10. Nxe5 Bd6 11. Nxc6 Re8 12. Bg5 Bb7 13. Bxf6 gxf6 14.
Nd4 Bc5 15. Ndb5 Bb6 16. Rfe1 a6 17. Na3 Ba5 18. Nd5 *
Position (FEN): r3r1k1/1bp2p1p/p4p2/b2N4/4P3/N7/PPP2PPP/R3R1K1 b - - 3 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1713
Best move: Bxd5