Last night, I had four games running. Today, I only have three. The missing game does not show up in my game archive, and I can't seem to find it anywhere. It simply doesn't exist.

 

Any ideas what happened? How can a game just disappear like that? 

hrmm. do you remember your opponent? check your internet history to see if you can find the URL? we have put a few things into place to track this, but it is hard to look for something that isn't there anymore... any more info you can tell us is really helpful!

The game ID was 58428. When I try to access it directly, I get the message:

"This game has been aborted by one of the players."

 

I didn't even know it was possible to 'abort' a game. 

Yes, at the start a player can "abort" the game if they have not played any moves yet.