Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Nf3 d6 3. Bc4 e6 4. Nc3 Nc6 5. O-O Nf6 6. d3 Be7 7. Bg5 O-O 8. Ne2
Nd7 9. Bxe7 Nxe7 10. Ng3 d5 11. exd5 exd5 12. Bb5 Nf6 13. c4 d4 14. Re1 a6 15.
Ba4 Bd7 16. Bxd7 Qxd7 17. Ne5 Qd6 18. Nh5 Nxh5 19. Qxh5 Ng6 20. Re4 *
Position (FEN): r4rk1/1p3ppp/p2q2n1/2p1N2Q/2PpR3/3P4/PP3PPP/R5K1 b - - 2 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 2011
Best move: f5