Chess puzzle (Crushing)
Opening: Slav_Defense, Slav_Defense_Winawer_Countergambit
Moves: 1. d4 d5 2. c4 c6 3. Nc3 e5 4. e3 e4 5. cxd5 cxd5 6. Bb5+ Nc6 7. Nge2 Nf6 8.
O-O Bd6 9. Nf4 Bxf4 10. exf4 Bf5 11. Re1 O-O 12. f3 exf3 13. Qxf3 *
Position (FEN): r2q1rk1/pp3ppp/2n2n2/1B1p1b2/3P1P2/2N2Q2/PP4PP/R1B1R1K1 b - - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1231
Best move: Nxd4