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I think I've seen that one before (but it's still very nice). Don't think it's actually a mate in 9 though, just a "White wins" (there was 2...e6 3 e4 f6 4 ef e5 and now White has to release Black's king).
Yeah, that is a good point! I just loved the puzzle and noticed the end result and the number of moves. haha :)