When our guild did the challenge, we each submitted a list of 4 UFOs numbered 1 to 4 with a brief description. We paid $1 to enter and got one entry for the drawing to be held at the end. Each quarter, a number was drawn and everybody had to complete the corresponding quilt during that quarter. We had to show our completed quilt at the end of the quarter before the next number was drawn. If you hadn't finished your UFO, you put another $1 in the pot. If you had finished, you got one entry into the drawing that was held at the end of the year. So if you completed all your UFOs, you got 5 entries. A lot of us didn't manage to complete all of them so there was quite a bit of money won by someone at the end .