Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nxc6 bxc6 6. Nc3 Bb4 7. Qd4 Nf6 8.
Qxb4 Ng4 9. e5 Nxe5 10. Bf4 Ng6 11. Bg3 Ne7 12. Bd6 Nf5 13. Bc5 d6 14. Be3 Nxe3
15. fxe3 O-O 16. O-O-O c5 17. Qe4 Rb8 18. Nb5 Qa5 19. a4 Bd7 20. Rxd6 Bxb5 21.
Bxb5 Rfd8 22. Rxd8+ Rxd8 23. Rd1 Rb8 24. Qd3 g6 25. c3 Qb6 26. h4 a6 27. Bxa6 *
Position (FEN): 1r4k1/5p1p/Bq2p1p1/2p5/P6P/2PQP3/1P4P1/2KR4 b - - 0 27
Black to move.
Themes: Queenside Attack Endgame Mate in 1 
Puzzle rating: 841
Best move: Qxb2#