Dearly Beloved

This is a rather intriguing game. First of all, both players appear to miss a three-fold repetition in the middlegame (or they both choose to ignore it). The ending is quite crazy. Both players rush to queen their pawns, and at one point, there are five queens on the board! However, even though White has three queens, he is unable to capitalize, and eventually goes down in defeat. Did he err at some point? That's for you to decide.