Chess puzzle (Checkmate)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Scandinavian_Variation
Moves: 1. d4 d5 2. Nc3 Nc6 3. e4 dxe4 4. Nxe4 Qxd4 5. Qxd4 Nxd4 6. Bd3 Nf6 7. Nxf6+
exf6 8. Be3 Ne6 9. Nf3 g5 10. O-O h5 11. Rfe1 Bd7 12. Nd4 O-O-O 13. Nxe6 fxe6
14. Bxa7 b6 *
Position (FEN): 2kr1b1r/B1pb4/1p2pp2/6pp/8/3B4/PPP2PPP/R3R1K1 w - - 0 15
White to move.
Themes:  Middlegame Double Bishop Mate, Mate in 1 
Puzzle rating: 726
Best move: Ba6#