Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 O-O 8.
Qd2 Nc6 9. O-O-O Nxd4 10. Bxd4 Be6 11. Be3 Qa5 12. Kb1 Rfc8 13. a3 Rab8 14. Nd5
Qxd2 15. Rxd2 Bxd5 16. exd5 a6 17. Bd3 b5 18. Rhd1 Nxd5 19. Ba7 Rb7 20. Be4
Rxa7 21. Bxd5 e6 22. Bb3 d5 23. c3 a5 24. a4 bxa4 25. Bxa4 Rb8 26. Ka2 Rc7 27.
Rb1 Bf6 28. f3 Kg7 29. g4 g5 30. Re2 h6 31. h3 Rcb7 32. Bc2 Rb6 33. Bd3 d4 34.
cxd4 Bxd4 35. Be4 Rb4 36. b3 a4 37. bxa4 *
Position (FEN): 1r6/5pk1/4p2p/6p1/Pr1bB1P1/5P1P/K3R3/1R6 b - - 0 37
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1150
Best move: Rxa4#