1.37 released27 Apr 2013
This release includes two new AIs, a honest Monte Carlo Tree Search AI and a cheating Vegas AI. We have been experimenting with an honest Monte Carlo Tree Search AI for a while but its performance was rather poor. The breakthrough was to use a random selection of the opponent’s library as the opponent’s hand during the random playout phase of the AI.
We benchmarked all current AIs. The strongest is the cheating version of the Monte Carlo Tree Search AI at level 8. Surprisingly, the honest version at level 8 is the second strongest, outperforming even the cheating Minimax AI at level 8.