Comment by nemomarx

Computers are banned in everything except specific tournaments for computers, yeah. If you're found out to have consulted one during a serious competition your wins are of course stripped - a lot of measures have to be taken to prevent someone from getting even a few moves from the model in the bathroom at those.

Not sure how smaller ones do it, but I assume watching to make sure no one has any devices on them during a game works well enough if there's not money at play?