The scoring of each state is difficult, but I think that the main searching algorithm is not bad.
Use only Minimax is not powerful enough I think.
I try to implement MCTS for searching, there might have some bug(?) need to be fixed up?
But I think it's a little powerful than Minimax.
How to decide the parameter C in UCB?
Next I'll try to combine these two searching stategy.
We can test it by playing with website(?) reversi game.