This is a mate in three!
1. Bd5 Rxd5 2. e8=Q+ Rd8 3. Qxd8#
or 1. ... Rxe7 2.c8=Q#, or 2. Bxc6#
or 1. ... h1=Q 2. c8=Q#!
Yeah, I can't even find any mate in 5
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