Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 c5 3. Nf3 e6 4. a3 cxd4 5. Nxd4 Nc6 6. Nc3 Bc5 7. Nb3 Be7 8. c5
O-O 9. Bf4 e5 10. Bg5 d6 11. Bxf6 gxf6 12. cxd6 Qxd6 13. e3 Qxd1+ 14. Rxd1 Be6
15. Nd2 Na5 16. b4 Nb3 17. Nxb3 Bxb3 18. Rd7 Rac8 19. Kd2 Rfd8 20. Rxd8+ Rxd8+
21. Kc1 a5 22. Kb2 a4 23. Kc1 f5 24. Bb5 Ra8 25. Kb2 e4 26. Rc1 Bf6 27. Bd7 Rd8
28. Bxf5 Rd2+ 29. Kb1 Rxf2 30. Bxe4 b6 31. Nd1 *
Position (FEN): 6k1/5p1p/1p3b2/8/pP2B3/Pb2P3/5rPP/1KRN4 b - - 1 31
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1284
Best move: Ba2#