Apparently, two bishops and a king can mate a king supported by a lone knight, according to endgame tablebases, but it generally takes more than 50 moves, which is why it seems that one is studying that endgame.
Watching optimal play of such a position looks inhuman. It seems that the bishops really dominate the knight and that there are some complicated maneuvers where the king can be forcibly separated from his knight or where he can be pushed towards an edge. In the end, the king and knight are trapped in a quadrant and their moves can be methodically restricted such that the knight is pinned against the black king. Then zugzwang leads to the capture of the knight. So it looks like the game can be seperated into phases but it is really hard to to quantify "progress" just by looking at a position.
Do there exist any analyses or resources on how to learn this endgame anywhere or is it too hard / irrelevant for humans? Do grandmasters have the skills to play this endgame (with or without 50-move rule)?