Checkmate 249

In the game Ambrouse-Capricious the black bishops and queen are beautifully placed to attack the white king.
What is the move for the final attack?
Solution of the last position:

The white bishop moved to h6 with idea to go to g7 to gave the checkmate. If black moves the knight to e6 or the rook to g8 to defend g7 sqaure, then the bishop moves to g7 and when it is captured the f6 pawn captures back to give the checkmate
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