Chess puzzle (Advantage)
Moves: 1. d4 d5 2. c4 c6 3. Nf3 e6 4. Qc2 Nf6 5. g3 Be7 6. Bg2 Nbd7 7. O-O O-O 8. b3
b6 9. Ba3 Re8 10. Bxe7 Qxe7 11. cxd5 cxd5 12. Qc6 Ba6 13. Re1 Rec8 14. Qa4 Bb7
15. b4 Ne4 16. Nbd2 Bc6 17. Qb3 Nxd2 18. Nxd2 Bb5 19. e4 dxe4 20. Bxe4 Rab8 21.
a4 Bc6 22. d5 Ba8 23. dxe6 fxe6 24. Bxa8 Rxa8 25. Rxe6 Qf7 26. Rae1 Nf6 27. h3
Re8 28. Rxe8+ Rxe8 29. Rxe8+ Nxe8 30. f4 Qxb3 31. Nxb3 Kf7 32. Kf2 Ke6 33. Ke3
Kd5 34. Kd3 Nd6 35. Nd4 a6 36. g4 g6 37. h4 Ne4 38. Ke3 Nd6 39. b5 a5 40. g5
Nc4+ 41. Kd3 Nb2+ 42. Kc3 *
Position (FEN): 8/7p/1p4p1/pP1k2P1/P2N1P1P/2K5/1n6/8 b - - 4 42
Black to move.
Themes:  Endgame, Knight Endgame  
Puzzle rating: 960
Best move: Nxa4+