So to date, the Alberta group has had to approximate best moves to meet time pressures, a compromise that has created systematic errors in it's program. While in chess players vie to have the highest skill rating, part of the poker strategy is to camouflage your skills and sucker your opponents. In poker, there really is no benefit to being famous. Moreover, since the dynamics of the game change with different players, you would probably have to play a number of games against a variety of opponents to say you were the best in the world. You can't avoid human psychology.
Players have hidden cards that they are required to show only if they are in on the final bets.
These cards are not shown if people fold before that time. This means that the computer does not know what its opponents were reasoning during most of their play. Good players who folded on bad hands and bad players who folded on good hands give out exactly as much information as the other. Thrusting chips brusquely may mean one thing, gnawing on a finger means another. As of today, no computers can interpret human body language.