Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6 8. Bg5
Be7 9. Bxf6 Bxf6 10. Nd5 Nd7 11. Bc4 b5 12. Nxf6+ Qxf6 13. Bxe6 Qxe6 14. Nd2
O-O 15. Qe2 Rac8 16. Nb1 d5 17. Nc3 Nb6 18. exd5 Nxd5 19. Nxd5 Qxd5 20. c3 Rfe8
21. O-O e4 22. Kh1 e3 23. a3 f5 24. Rad1 Qe5 25. f4 Qc5 26. Rd3 Rcd8 27. Rxd8
Rxd8 28. Rd1 Rxd1+ 29. Qxd1 Qc4 30. Qd8+ Kf7 31. Qd7+ Kg6 32. Qe8+ Kh6 33. Qxe3
Qf1+ 34. Qg1 Qxf4 35. Qe1 Qe4 36. Qxe4 fxe4 37. b3 Kg5 38. Kg1 Kf4 39. Kf2 e3+
40. Ke2 Ke4 41. g3 g5 42. h3 h5 43. a4 *
Position (FEN): 8/8/p7/1p4pp/P3k3/1PP1p1PP/4K3/8 b - - 0 43
Black to move.
Themes:  Endgame, Pawn Endgame  
Puzzle rating: 1402
Best move: bxa4