Nice 1177 rated puzzle

All you have to ask yourself is: do I want my Q more central while opponent has a blocked pawn on the edge or do I want my Q in the corner while he has a more centralized pawn closer to his K and promotion square? It’s not really needed to calculate deeply.

This is a funny one.
#21 Yeah, endgames don't work that way. One move works tactically, the other move doesn't. That's all there is to it, trying to blindly apply "principles" in an endgame will bite you in the bottocks.

A classic example of the inadequacy of puzzles. People are boasting that they "solved" it (without actually bothering to really look at the position).