I feel like checking the king with the knight is the move (or maybe checking with the bishop?), but as I don't know what black would do next (multiple options), I'm not sure how to continue solving this puzzle.
this territory is moderated
This one's called Plaskett's puzzle
Nf6+, Kg7, Nh5+, Kg6, Bc2+, Kxh5, d8=Qd8, Nf7+, Ke6, Nxd8+, Kf5, e2, Be4, e1=Ne1, Bd5, c2, Bc4, c1=Nc1, Bb5, Nc7, Ba4, Ne2, Bd1, Nf3, Bxe2, c4, Bxf3#
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