Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 a5 2. c4 Nf6 3. Nc3 e6 4. Bg5 Be7 5. Nf3 c6 6. e3 Qb6 7. Rb1 c5 8. Bd3
cxd4 9. Na4 Qd8 10. Nxd4 e5 11. Nf5 h6 12. Nxg7+ Kf8 13. Bxf6 Bxf6 14. Nh5 Bg5
15. Qf3 Nc6 16. Bg6 Qe7 17. O-O Kg8 18. Qd5 Nb4 19. Nc3 *
Position (FEN): r1b3kr/1p1pqp2/6Bp/p2Qp1bN/1nP5/2N1P3/PP3PPP/1R3RK1 b - - 11 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 813
Best move: Nxd5