Originally posted by Coconut
Once black realized he didn't have a checkmate, and in fact gave away his queen, he resigned. White wins.
After resigning, black drank xymself senseless out of frustration and suffered a memory loss. Xe woke with a bad hangover, saw that the game was finished, and thought xe had won by checkmate because xe was too hungover to notice the knight. Xe then went to the tournament page to enjoy the newly won points, found out that they were not there, and posted about it in the forum.