We've done this kind of ad hoc in the past, and it's probably time to make a rule. Sorry for the delay -- wanted to double check everyone agreed.
If you want to close a challenge you've won or lost, you may do so. I'll give you a button when I have a chance; for the moment, just send me a note. In the mean time, I'll treat this as a request and close this one.

Good job, Baha. Not that there was seriously any doubt, but making a gold challenge look like a formality is a special kind of awesome.