Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 d5 8.
Nxc6 bxc6 9. exd5 cxd5 10. O-O O-O 11. Bf3 e6 12. Bc5 Re8 13. Re1 Bd7 14. Qd3
Qc7 15. Bd4 Rac8 16. Rac1 a5 17. Nb5 Bxb5 18. Qxb5 Nd7 19. Bxg7 Kxg7 20. Re3
Rb8 21. Qd3 Rec8 22. Qd4+ Kg8 23. Be2 Qc5 24. Qa4 Nb6 25. Qh4 Nc4 26. Rh3 h5
27. Qf6 Nd6 28. Bd3 Ne8 29. Qg5 Ng7 30. Rf3 d4 31. Qf6 Rc7 32. b3 Nf5 33. Bxf5
exf5 34. Rd3 Rd7 35. h3 Re8 36. c3 Re6 37. Qh4 Re4 38. Qg3 Qa3 39. Rc2 a4 40.
f3 *
Position (FEN): 6k1/3r1p2/6p1/5p1p/p2pr3/qPPR1PQP/P1R3P1/6K1 b - - 0 40
Black to move.
Themes:  Endgame  
Puzzle rating: 1972
Best move: axb3