Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_La_Bourdonnais_Variation
Moves: 1. f4 e6 2. e4 Nh6 3. d4 d5 4. e5 Nc6 5. Nf3 Be7 6. c4 Nf5 7. c5 Bh4+ 8. g3
Nxg3 9. hxg3 Bxg3+ 10. Ke2 Ne7 11. Nbd2 b6 12. b4 Ba6+ 13. Ke3 *
Position (FEN): r2qk2r/p1p1nppp/bp2p3/2PpP3/1P1P1P2/4KNb1/P2N4/R1BQ1B1R b kq - 2 13
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 938
Best move: Nf5#