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nabla: But i think the rules of BrainKing about Backgammon don´t explain how works the first roll. I didn´t know this rule so i thought it was possible getting a double in the first roll. Backgammon isn´t a popular game in Spain.
Matarilevich: Ok. I wouldn't occur to me to allow white to move on a double. In fact why wouldn't the computer just randomly determine the start, no need to "roll dice" to determine.
In over the table games you just keep re-rolling until someone gets a higher number, as nabla said. The idea of doubling the game stakes is just a variation played by some, but not in any official rules.
grenv: I agree, it would be even better if the computer decided randomly who played before the start of the game, without the unnecessary pass move we have one time out of two. But Fencer may think that it would be a kind of auto-pass, in which case this feature is doomed.