On the Parallelization of UCT

We present three parallel algorithms for UCT. For 9 ×9 Go, they all improve the results of the programs that use them against G NU O 3.6. The simplest one, the single-run algorithm, uses very few commu nications and shows improvements comparable to the more complex ones. Further i mprovements may be possible sharing more information in the multiple-runs a lgorithm.