Chess puzzle (Checkmate)
Opening: Scotch_Game, Scotch_Game_Other_variations
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 c5 6. Qe5+ Qe7 7. Bf4 Qxe5
8. Bxe5 f6 9. Bg3 b6 10. Nc3 Bb7 11. Nd5 Bxd5 12. exd5 O-O-O *
Position (FEN): 2kr1bnr/p2p2pp/1p3p2/2pP4/8/6B1/PPP2PPP/R3KB1R w KQ - 1 13
White to move.
Themes:  Middlegame Boden's Mate, Mate in 1 
Puzzle rating: 645
Best move: Ba6#