BGonline.org Forums

Stone Position?

Posted By: Brus
Date: Friday, 28 August 2026, at 2:13 a.m.

Does anyone know about something called the Stone Position. I got this from an AI engine. It's name after Tobias Stone who analyzed in the 1970s and it's supposedly stood up to AI analysis to this day. Here's how the AI began describing it:

The Stone Position in backgammon is a classic, end-game "holding game" reference profile that calculates the exact mathematical thresholds of when a trailing player can safely accept a double when facing a closed, running prime.The layout, its tactical trap, and how computer neural networks finally validated Stone's 1970s calculations define this end-game state:1. The Anatomy of the Stone PositionThe Stone Position occurs during the late phase of a game where Player A (the Leader) has successfully cleared all of their back checkers and built a formidable, contiguous 5-point or 6-point prime in their outer or home board. They are attempting to safely bring their final checkers around to begin bearing off.