Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit, Blackmar-Diemer_Gambit_Lemberger_Countergambit
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. f3 exf3 5. Nxf3 Bg4 6. d5 Bd6 7. h3 Bh5 8. Ne4
f5 9. Nxd6+ cxd6 10. Bg5 Nf6 11. g4 fxg4 12. hxg4 Bxg4 13. Bh3 Bxf3 14. Qxf3
O-O 15. Be6+ Kh8 16. Qh3 h5 17. O-O-O Nbd7 18. Qxh5+ Nxh5 *
Position (FEN): r2q1r1k/pp1n2p1/3pB3/3Pp1Bn/8/8/PPP5/2KR3R w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 780
Best move: Rxh5#