10 seconds. The solution is because the composers are biased towards "unnatural" looking moves - and so we consider the ridiculous options first.
White in 3
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I know it was fairly easy I just like it.I couldn't tell you why.Being hard to solve wasn't why for sure.
Probably works in 2 moves with Q - f3 then mate. After b-h1, moving up the pawn h3 gets the K an extra move so the puzzle isn't really correct as it is.
White mates in three by S.P.Tsirulik