Over the last year there was a situation where a player was using and sharing Nash "charts" for no limit on Pokerstars. Originally PS had allowed the software,

Over the last year there was a situation where a player was using and sharing Nash "charts" for no limit on Pokerstars. Originally PS had allowed the software, but decided to change its police since it was more than just a preflop starting hand chart. I believe the charts were used in headsup SNGs, which makes sense since it eliminates a lot of variables in solving for game theory optimal plays, and a lot of the play is shortstacked. And if a human can look at a chart and click a button, then so can a piece of software. More here: http://forumserver.twoplustwo.com/28/internet-poker/3rd-party-software-pokerstars-proposed-rule-changes-1538981/ http://forumserver.twoplustwo.com/28/internet-poker/3rd-part... I've also talked to a few players who suspect there exist bots in headsup cash games that avoid playing regular winning players. So I don't know if there are any 100% true general no limit bots, but there's definitely some automated play going on.