Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Lasker-Pelikan_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8.
Na3 Be7 9. Bxf6 Bxf6 10. Nd5 O-O 11. c3 Bg5 12. Qh5 Be6 13. h4 Bh6 14. g4 Bf4
15. Nxf4 exf4 16. Bc4 Ne5 17. Bxe6 fxe6 18. O-O-O Qe7 19. g5 *
Position (FEN): r4rk1/1p2q1pp/p2pp3/4n1PQ/4Pp1P/N1P5/PP3P2/2KR3R b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1927
Best move: f3