EXtreme Gammon

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eXtreme Gammon is backgammon software written by Xavier Dufaure de Citres and released in 2009. [1] It is available for Microsoft Windows and mobile platforms.

Contents

According to the Financial Times , the program is the best backgammon player in the world, and the near-exclusive study tool for all serious backgammon players. [1]

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. [1] [2]

eXtreme Gammon Performance Ratings
PRDescription ELO equivalent
0.0-2.5World Champ2162-2240
2.5-5.0World Class2077-2162
5.0-7.5Expert1986-2077
7.5-12.5Advanced1792-1986
12.5-17.5Intermediate1593-1792
17.5-22.5Casual Player1405-1593
22.5-30.0Beginner1167-1405
30.0 or moreDistracted1167 or less

References

  1. 1 2 3 Roeder, Oliver (2023-07-28). "Backgammon's AI super-brain is for sale". Financial Times. Retrieved 2023-08-01.
  2. ↑ https://www.extremegammon.com/extremegammon2.pdf [ bare URL PDF ]


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