Chess puzzle (Checkmate)
Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nf6 7. Ne5 h6 8.
Nxg6 fxg6 9. Qd3 g5 10. Qg6+ Kd7 11. Be3 Kc8 12. O-O-O Nbd7 13. Bc4 Qa5 14. Be6
Kc7 15. Kb1 Rd8 16. Rd3 Nd5 17. Ra3 Qb4 18. Bxd5 cxd5 19. Rxa7 Nb6 20. Ra3 Nc4
21. Rc3 *
Position (FEN): 3r1b1r/1pk1p1p1/6Qp/3p2p1/1qnP4/2R1B1N1/PPP2PPP/1K5R b - - 4 21
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 980
Best move: Qxb2#