First, I apologize if this idea was somehow expressed before (I don't have time to read all 8 pages)...
Might I suggest that you base the winner on the image number modulo (# of images) rather than using the closest of the last few digits? This would be more definitive. Essentially, if r is the random number and m is the number of images submitted, then the winner would be image (r mod m) + 1. If the winning image fails the test criteria, reduce m by one and re-calculate with the remaining images (renumbering them, ofc).
Anyway, very nice contest (since I never HOF and rarely global, I have no reason to use autoscreen, <sigh>, but I do like it nonetheless).
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