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Truncated rollouts at the start of a game

Posted By: Tom Keith
Date: Sunday, 20 June 2010, at 2:22 p.m.

In Response To: Role of truncs, variance of full rollouts (Nack Ballard)

I think truncated rollouts at the start of the game work better than in the middle of the game:

(1) The bot is playing in familiar territory. The evaluation at the horizon (truncation point) is likely to be fairly accurate.

(2) The game is still pretty symmetric. The play of one side should not be that much harder than the other. And the type of game you see comparing one play to another will often be similar because the home boards are still open and anything can happen. So systematic errors will cancel each other out more than later in the game.

(3) Full rollouts from the start are long and have high random error. (A relative advantage for truncated rollouts.)

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