Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_Knight_Variation
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. Qe2+ Be7 5. Nc3 Nf6 6. d4 O-O 7. Bg5 Bg4 8.
Bxf6 Bxf6 9. O-O-O Re8 10. Qb5 Nc6 11. Qxb7 Bxf3 12. gxf3 Nxd4 13. Nxd5 Nxf3
14. Nxc7 Qxd1+ 15. Kxd1 *
Position (FEN): r3r1k1/pQN2ppp/5b2/8/8/5n2/PPP2P1P/3K1B1R b - - 0 15
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1540
Best move: Re1#