Chess puzzle (Checkmate)
Opening: Indian_Defense, Indian_Defense_Other_variations
Moves: 1. d4 Nf6 2. Bf4 g6 3. Nc3 Bg7 4. e4 d6 5. Qd2 O-O 6. O-O-O Nc6 7. f3 e5 8.
dxe5 dxe5 9. Qxd8 Rxd8 10. Rxd8+ Nxd8 11. Bxe5 Ne6 12. Nd5 Nxe4 13. Bxg7 Nf2
14. Bh6 f5 15. Bc4 Kh8 16. Be3 Nxh1 17. Nxc7 Nxc7 *
Position (FEN): r1b4k/ppn4p/6p1/5p2/2B5/4BP2/PPP3PP/2K3Nn w - - 0 18
White to move.
Themes:  Middlegame Double Bishop Mate, Mate in 1 
Puzzle rating: 578
Best move: Bd4#