Tough Endgame Puzzle
Black to move. Spoiler alert below.
There are multiple lines so I just included what I did.
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The first key was figuring out where to move the Knight: 1. ... Ng6 2. Kf5 Nf8 looked promising but 3. e6+ Nxe6 4. g6+ Kxg6 5. Kxe6 leads only to a draw.
1. ... Nc6 threatens 2. ... Nxe5+ so White throws in the tricky 2. g6+ and Black has to see that capturing the pawn allows 3. e6 and Black will have to sac a piece and again, it's a draw.
2. ... Ke6 keeps the King central and now the Knight will do some fancy footwork and it and the King will arrive on time to stop the g pawn.
The puzzle rating is 2776. The target time was 37 seconds; I took almost 24 minutes.