Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d5 5. Bg2 O-O 6. O-O dxc4 7. Ne5 Nbd7 8.
Nxc4 c5 9. Nc3 cxd4 10. Qxd4 Qc7 11. Nd5 Nxd5 12. Qxd5 Nf6 13. Qd3 Bf5 14. e4
Rfd8 15. Qe2 Nxe4 16. Bxe4 Bxe4 17. Qxe4 Rd4 18. Qe2 Qxc4 19. Qxe7 Rad8 20.
Qxb7 Rd1 21. Bg5 *
Position (FEN): 3r2k1/pQ3pbp/6p1/6B1/2q5/6P1/PP3P1P/R2r1RK1 b - - 2 21
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 974
Best move: Qxf1#