Poker Bots. Do they work?

Well. I also heard about poker bots but I don't think they can win lot money. Maybe they can won against totally stupid opponents but if somebody knows just a bit about poker than they are useless. I think this because I heard that people can write a program to beat professional chess players but nobody can write a software which would beat a professinal poker player because in poker there is lot of information which is hidden (in chess you know everythink -- you know which is the best move at any moment) so you can't count with it. I think poker bots are similar to poker card reader softwares which are also not too useful softwares (expect for beginers).

of course it can it was many years the first time a computer won over the world champion in chess

i think party poker is the only "big" site that doesnt detect/ doesnt care about bots i think they work but are only based on statistics so a bluff or a bit of luck can destroy them they only work on certain sites also