Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 g6 6. Be3 Bg7 7. Nc3 O-O 8. Qd2
Nc6 9. O-O-O a5 10. g4 a4 11. h4 a3 12. b3 Ne5 13. Be2 Bd7 14. h5 Rc8 15. Nd5
Nxd5 16. exd5 Qc7 17. c4 b5 18. Bh6 bxc4 19. Bxg7 Kxg7 20. hxg6 cxb3+ 21. Kb1
bxa2+ 22. Kxa2 h5 23. Rxh5 Rh8 24. Rh7+ Rxh7 25. gxh7 Kh8 26. f4 Ng6 27. f5 Ne5
28. g5 Nc4 29. Qc3 Qa5 *
Position (FEN): 2r4k/3bpp1P/3p4/q2P1PP1/2nN4/p1Q5/K3B3/3R4 w - - 3 30
White to move.
Themes:  Middlegame  
Puzzle rating: 1851
Best move: Qxa5