Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. a3 d5 3. g3 c5 4. dxc5 Qa5+ 5. b4 Qc7 6. Bb2 a5 7. c3 Nc6 8. e3
Bf5 9. Bg2 e6 10. Ne2 Be7 11. Nd4 Be4 12. Bxe4 Nxe4 13. Nd2 h5 14. Nxe4 dxe4
15. h4 O-O-O 16. Qb3 g5 17. hxg5 Bxg5 18. O-O-O h4 19. gxh4 Bxh4 20. Rdf1 Bxf2
21. c4 Rxh1 22. Rxh1 Qg3 23. Nxc6 Bxe3+ 24. Kb1 bxc6 25. bxa5 Bf2 26. Qb6 Qd3+
27. Ka1 Bd4 28. Qxc6+ Kb8 29. Rb1 *
Position (FEN): 1k1r4/5p2/2Q1p3/P1P5/2Pbp3/P2q4/1B6/KR6 b - - 2 29
Black to move.
Themes: Pin Endgame Mate in 1 
Puzzle rating: 1522
Best move: Qxa3#