Chess puzzle (Advantage)
Moves: 1. c4 e5 2. g3 Bc5 3. Bg2 Nc6 4. a3 a5 5. Nf3 b6 6. Nc3 Bb7 7. e3 Qf6 8. Nd5
Qd8 9. b3 Nf6 10. Bb2 Nxd5 11. cxd5 Ne7 12. Bxe5 Bxd5 13. Bxg7 Rg8 14. Bf6 Rg6
15. Bxe7 Qxe7 16. d4 Bd6 17. Qc1 O-O-O 18. O-O Qf6 19. Qd1 h5 20. Re1 Re8 21.
Qd3 *
Position (FEN): 2k1r3/2pp1p2/1p1b1qr1/p2b3p/3P4/PP1QPNP1/5PBP/R3R1K1 b - - 3 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1146
Best move: Bxf3