Sometimes, people can't leave a good thing alone. Some players try to get fancy and end up throwing a good game away. I had misplayed my ending, giving my opponent in blitz a tremendous advantage. All he had to do here was 40...Qa1 and game over. But no, he had to play 40...Qf4+. I suspect he expected me to play 41. g3 and then he could harrass my king further on the second rank. Great. He can pick up my pawn on a7 on the way out. Unfortunately, 40...Qf4+ put his queen out of the way after 41. Rg3! There was no tempo-gaining move for black. The A pawn promoted to a queen and the game went to white.