Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Mason_Attack
Moves: 1. f4 d5 2. d4 Bf5 3. e3 e6 4. Nf3 c5 5. c3 Nc6 6. Bb5 Qb6 7. Bxc6+ bxc6 8. O-O
Nf6 9. Nbd2 cxd4 10. Nxd4 c5 11. Nxf5 exf5 12. Qa4+ Nd7 13. Nf3 Bd6 14. b4 O-O
15. bxc5 *
Position (FEN): r4rk1/p2n1ppp/1q1b4/2Pp1p2/Q4P2/2P1PN2/P5PP/R1B2RK1 b - - 0 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1617
Best move: Nxc5