The standard desktop license allows you to install the software on up to two computers that you own (e.g., your desktop and your laptop).
Calculate the exact Equity (or luck-adjusted True Equity) of complex checker plays and cube actions down to the fraction of a percent.
No. A standard Extreme Gammon desktop license is a one-time purchase. Your activation key provides a lifetime license for that major version of the software. What should I do if I lose my key?
The free trial eventually locks analysis features.
: eXtreme Gammon serves as the gold-standard analysis engine in the backgammon community. It provides a widely accepted benchmark for player skill called the Performance Rating (PR), which measures the equity lost per decision multiplied by 500. The PR scale categorizes players from "World Champion" (0.0–2.5 PR) to "Distracted" (30.0+ PR), offering clear, quantifiable feedback on every match.
The only secure and legal way to obtain an Extreme Gammon activation key is to purchase it directly through official channels.
Members of organizations such as the USBGF (United States Backgammon Federation) or GammonSite are eligible for discounts on their first activation—20% off for USBGF members and a $12.00 discount for GammonSite members. Additionally, some national backgammon federations, such as the FFBG in France, offer discounted licenses to their members.
Sometimes, users encounter hurdles while trying to activate their software. Here are the most common issues and how to fix them. 1. Key Not Recognized (Typo Errors)
If you still have access to your old computer, open XG, go to Help > Deactivate . If your old computer is broken or lost, you will need to contact Extreme Gammon support via email to request a manual reset of your activation counter. 💡 Frequently Asked Questions (FAQs) Can I use my Extreme Gammon activation key on Mac?