Crawford rule

Crawford rule makes the doubling cube unavailable for a specific game in a series of matches (a.k.a. match play), if one player is one point below the goal.

Example: suppose, two players play a match up to 7. If the score is 6-2, then for the next game the doubling cube will not be available.

However, if the game is won by the player who is behind, the score would be 6-3 and on the next game the doubling cube would be available.



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