thanks. another smaller point i just remembered - i was a bit surprised to see that the evaluator could see my submissions to the "validate" function. given that you do say they won't influence the score i assumed that they would be discarded.

i can see there are several reasons why this is useful to the evaluator, and i can also see that you're getting close to saturating the user with instructions, but in a perfect world it would be good to have "full disclosure" (i guess you do, in that anyone can run the example....)