GammonSnap utilizes the GNU Backgammon software, a renowned and widely used backgammon software, for performing position evaluations. Within GammonSnap, the evaluation engine is configured with the predefined setting 'Supremo,' which is optimized for accurate and insightful position analysis.
It's important to note that the evaluation process is performed on a server. This means that in order to request a new evaluation for a position, internet access is required.
To learn more about GNU Backgammon and its features, you can visit their homepage: Link to GNU Backgammon