What happens if you give the human player a handicap? I wonder if the games are really as close as the commentators say, or if it's just a quirk of the MCST algorithm.
Considering the large training data set, handicap games would certainly be included. It's a great way to test aggressiveness and the effectiveness to reduce the opponents' territory whilst building your own.
As an amateur, handicap games where you try to overcome 3 or 4 stones are some of the most educational experiences. It requires a lot more creative thinking and perseverance to come back from such a disadvantage.