I had given the organizers the instruction booklet but they still haven't posted it. In the interest of fairness, I will announce the variants at the venue. FYI, day 1 will all be Classics. If you qualify for day 2, you will know the variants, and I will announce there that I'll be posting the IB here too so that everyone can come and see equally.
Detailed results below. Aditya Pradeep finished with 29 minutes to spare and would have had 3rd place if not for a mistake in the 6x6 Outside Sudoku. Ezhil was the 4th person to finish.