Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Mason_Variation
Moves: 1. d4 d5 2. Bf4 Nc6 3. e3 Bf5 4. Nf3 Nb4 5. Na3 a6 6. c3 Nc6 7. Nb1 Nf6 8. Nbd2
h6 9. h3 e6 10. Ne5 Nxe5 11. Bxe5 Nd7 12. Bh2 c5 13. Nf3 c4 14. Qa4 b5 15. Qd1
Be7 16. Ne5 Nxe5 17. Bxe5 O-O 18. Qf3 Bd6 19. Qf4 f6 *
Position (FEN): r2q1rk1/6p1/p2bpp1p/1p1pBb2/2pP1Q2/2P1P2P/PP3PP1/R3KB1R w KQ - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 892
Best move: Bxd6