400 is logistically the max. It double books every bank at every time slot (two groups competing on four machines). Given that many of the 'A' groups already play each machine for a solid 30 minutes, it's tough to get around.

That said, I'd be interested if adding another day would be at all possible? You know, I live 20 minutes away from the facility and, it's difficult to even get 8 hours of sleep Friday night because I have to be up the next day. It's the best problem I've every had! Still, an extra day would be even better and could reduce some of the stress of the people. Of course, then you have added stress on machines, so it would definitely be a trade-off.

I have a lot of friends who didn't get in, so I feel you on this one.

It could destroy the event, though. Now you're getting into the triple booking each bank. If there's any kind of hold up, that pushes back the entire schedule. There's already a small issue when some of the A groups go longer than 30 minutes on each machine; generally it only pushes the times back by 10 or 15 minutes so it's no big deal. Triple booking might expand that to 45 minutes or longer, which creates some havoc with the already tight schedules.

Bowen, who helps organize the event, makes his living working on math text books, so I'm sure he's explored a lot of set theory to get 400 players to work!