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Public web access to observe and play against Cepheus is available.

Upon creating a game, the bot sends a message people can click on to join. The bot is very simple: just start a game with /holdem. Play poker ( Texas hold' em) against up to 19 other players in chat. However, 0.000986 big blinds per game on expectation means that even if someone played against Cepheus for a lifetime, this person will not be able to say, with statistical significance, that they have won. An extremely simple and straight-forward bot that allows you to play no limit Texas hold 'em poker against others in chat.

It was developed by the Computer Poker Research Group (CPRG) at the University of Alberta and was introduced in January 2015 in a paper entitled "Heads-up limit hold’em poker is solved", published in Science by Michael Bowling, Neil Burch, Michael Johanson, and Oskari Tammelin.Ĭepheus' strategy is very close to a Nash equilibrium strategy for heads-up limit Texas hold'em, as an optimal counter-strategy to Cepheus can only win 0.000986 big blinds per game on expectation (to go from "essentially" solving the game to just "solving" the game, one has to reduce this expected loss to precisely 0 big blinds per game). This was the first imperfect information game played competitively by humans to be essentially solved. Cepheus is the first poker playing program that "essentially weakly solved" the game of heads-up limit Texas hold 'em.