by Douglas Zare
1 February 2013
The doubling point is a basic concept for understanding backgammon match play. The doubling point can be calculated from the match equity table rather than from any one position, but it can help us to analyze particular cube decisions over the board.
The doubling point is the minimum equity at which we would prefer the cube to be doubled, ignoring gammons. In money play and at every even match score, the doubling point is at 50% game winning chances. Of course, that you are the favorite does not mean you should double. You might double just over the doubling point if there really is no opportunity to use the cube later, but usually you want to be much closer to the take point to double.
At uneven match scores, the extra point you win may not have the same value as the extra point you lose.
Should Red double?
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