Chess puzzle (Checkmate)
Opening: Kings_Pawn_Game, Kings_Pawn_Game_Busch-Gass_Gambit
Moves: 1. e4 e5 2. Nf3 Bc5 3. Nxe5 Bxf2+ 4. Kxf2 Qh4+ 5. g3 Qxe4 6. Bg2 Qxe5 7. Re1
Qxe1+ 8. Qxe1+ Ne7 9. d3 Nc6 10. Bg5 f6 11. Bd2 O-O 12. Bb4 d6 13. Bxc6 Nxc6
14. a3 Bh3 15. Nd2 Nd4 16. Rc1 Rfe8 17. Qg1 *
Position (FEN): r3r1k1/ppp3pp/3p1p2/8/1B1n4/P2P2Pb/1PPN1K1P/2R3Q1 b - - 6 17
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 837
Best move: Re2#