WhisperzQ is right...there is always a chance you'll be playing a prog. Maybe there is even one for dark chess out there. But most variants have very weak progs that 1600-1700 level players can beat consistently. Personally I am rated lowest in progable games, so I think I'm playing against progs, but it doesn't bother me, there are always ways to steer clear of them. Or, as BB said, you can take the enlightened attitude that you don't mind playing them no matter what.