If the schedule table on the webpage http://www.acm.uiuc.edu/conference/events.html was assumed to be a hopscotch board, the large and long single foot/double foot sequence below the URL on the ad would align perfectly with the schedule from the beginning of the conference to the end. Each scheduled time either had one or two things scheduled in accordance with the feet. The feet were a sort of alignment sequence designed to convince competitors that they were of the right track.
After that, attention should be paid to the many sequences of feet going around the whole page. Each sequence if performed as a hopscotch on the original schedule would land you in a certain time slot (of two or one speakers), each with a unique single digit time (none would be mutli-hour events). If those single digit times were written out in pairs (as the feet sequences were colored in pairs) you would get something like: 88 93 94 97 83 93 98 83 88. If each of the numbers was assumed to be in base 12 (there were twelve different possible hours on the conference page), and was converted to base 10 and looked up in an ASCII table, the word "hopscotch"would be spelled out. Few people got the problem until our "Check all your bases" hint was released.
Puzzle one was only solvable for the first three days of the contest and it's answer was later given to anyone who could present valid answers for puzzles 2 and 3. This was a result of changes to the conference schedule, which this puzzle was dependent on.
10.14.2002 11:24PM CST Update
We may release one more hint for todays puzzle later in the week if we do not see any more correct answers for it submitted.
Tomorrow, there will be a few changes. We will be releasing hints at 2 designated times. Hints will be released at 2:00PM and 5:00PM if at all necessary. In addition we've cleaned up the e-mail process so you should have quicker responses tomorrow.
Great work on todays puzzles. Tomorrows will be more fun. 4 more days to the XBOX.
10.14.2002 5:07PM CST: Update
We're sorry that e-mail response has been so bad today. We are working to refine the system so that it will be more efficient and effective tomorrow. If you sent us the correct answer, we have responded. If you sent us anything incorrect, we are still going through those e-mails. If you have not heard from us and have submitted an answer, than the answer is likely wrong. Please continue to submit answers, and we will respond as we have time.
10.14.2002 2:36PM CST: Update
10.14.2002 2:00PM CST: Update
10.14.2002 11:09AM CST: Update
10.13.2002 11:43PM: Update
(c) 2002 josh michaels, igor kofman, sam glassenberg - e-mail firstname.lastname@example.org