Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 Qb6 4. b3 Bg4 5. dxc5 Qb4+ 6. Qd2 Qxc5 7. Be2 Nf6 8.
Nc3 e5 9. h3 Bxf3 10. Bxf3 Be7 11. O-O O-O 12. a4 Na6 13. Ba3 Qb6 14. Rad1 Rad8
15. Nd5 Nxd5 16. Qxd5 Nc5 17. Bxc5 dxc5 18. Qxe5 Bd6 19. Qg5 h6 20. Qe3 Qa6 21.
Rd5 Bh2+ 22. Kxh2 Qxf1 23. Rxd8 Rxd8 24. Qxc5 Qa1 25. Qxa7 Qe5+ 26. Kg1 b5 27.
Qb6 Rb8 28. Qa5 Qa1+ 29. Kh2 bxa4 30. e5 *
Position (FEN): 1r4k1/5pp1/7p/Q3P3/p7/1P3B1P/2P2PPK/q7 b - - 0 30
Black to move.
Themes:  Endgame  
Puzzle rating: 1514
Best move: a3