Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Exchange_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 6. Re1 Bg4 7. h3 Bh5 8. g4
Bf7 9. d4 Bd6 10. c3 Ne7 11. Nfd2 O-O 12. Nc4 *
Position (FEN): r2q1rk1/1pp1nbpp/p1pb1p2/4p3/2NPP1P1/2P4P/PP3P2/RNBQR1K1 b - - 4 12
Black to move.
Themes: Hanging Piece Opening  
Puzzle rating: 1259
Best move: Bxc4