eXtreme Gammon is backgammon software written by Xavier Dufaure de Citres and released in 2009. It is available for Microsoft Windows and mobile platforms.
According to the Financial Times, the program is the optimal backgammon player, and a study tool for competitive backgammon players.
Performance rating
eXtreme Gammon provides a widely accepted benchmark number for players' skills called the Performance Rating or PR, with a lower number indicating a better rating. PR is the average equity lost per decision multiplied by 500. Only decisions not considered to be "obvious" are counted.
+ eXtreme Gammon Performance RatingsPR Description Elo equivalent0.0-2.5World Champ2162-22402.5-5.0World Class2077-21625.0-7.5Expert1986-20777.5-12.5Advanced1792-198612.5-17.5Intermediate1593-179217.5-22.5Casual Player1405-159322.5-30.0Beginner1167-1405 30.0 or moreDistracted1167 or less
References
External links