Looks like we were looking at two different pages. I found the one you were looking at: http://www.logic-puzzles.org/contest3.php
The one I was looking at was this one:
As you can see, on THAT page, the bit about "Only players who are ranked in the top 50 of that month's high-score challenge, and who have a solving percentage of 75% or better, are eligible for this contest." is definitely missing.
Can it please be added to the page that I was looking at? Thanks!