No particular accuracy is required in this ending, as long as the N stands on the promotion square or controls it from the side. In other words, 1.Kg8, 1.Kg7, 1.Kh7, 1.Ne2+, and 1.Na2+ all maintain the drawn result (knight- and rook-pawns are trickier).
It's a good illustration, and thanks for sharing it, I just wanted to make sure there was no confusion as the puzzle format makes it appear there's only one right move. :)
Can somebody find the way white draws this game here... its incredible but it actually is a draw. the key is find the correct moves