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The Hardest Mate in 1 that The engine can't solve the original postiton

so Bb2+ f6 then what happens??
no, the rook on b7 pins the f pawn
NOOOOO The pawn on e7 stops the pin of the f7 pawn

so Bb2+ f6 then what happens??
no, the rook on b7 pins the f pawn
NOOOOO The pawn on e7 stops the pin of the f7 pawn
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The engine can't find it! White played Bb2 and black blocked by playing e5