So this is, like, the alternative competition for people who don't want to get lean doing the T-ransformation? Got it. Should be interesting to see how it ends up with some of the big lifters around here. Curious to see if anyone will try tackling both challenges.
I think judging form will probably be the trickiest part. As was said, depth on squats will probably be the killer. Deadlifts, benching, and other stuff that has an easily identifiable ROM is more concrete. Unless you just want to go with the majority decision, if 5 people say a squat looks high, it's probably high.
Max reps with a predetermined weight could be a way to let relative-beginners get involved too. 135 or 185 bench, 185 or 225 squat, 225 or 275 deadlift, etc. Just some suggestions. Like the other challenge, you guys can take the wheel and sort it out as you go.
Or, flip it and go with max weight for X reps. (3, 5, 10, whatever). Best 5RM bench, Best 10RM squat, heaviest 10RM chin-up. Would also be interesting to see the Kroc row included, something like total volume (weight x reps) wins. Just tossing some ideas out.