EXtreme Gammon
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.
| PR | Description | Elo equivalent |
| 0.0-2.5 | World Champ | 2162-2240 |
| 2.5-5.0 | World Class | 2077-2162 |
| 5.0-7.5 | Expert | 1986-2077 |
| 7.5-12.5 | Advanced | 1792-1986 |
| 12.5-17.5 | Intermediate | 1593-1792 |
| 17.5-22.5 | Casual Player | 1405-1593 |
| 22.5-30.0 | Beginner | 1167-1405 |
| 30.0 or more | Distracted | 1167 or less |
References
- 1 2 3 Roeder, Oliver (2023-07-28). "Backgammon's AI super-brain is for sale". Financial Times. Retrieved 2023-08-01.
- ↑ "extremegammon2" (PDF).
External links
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