I've developed a Monte Carlo tree search algorithm in checkers.
Here is my question. What should be the value of $C$, the exploration parameter in the following formula described in Monte Carlo Tree Search (MCTS)?
$$ S_i=x_i+C\sqrt{\frac{\ln (t)}{n_i}}$$
General consensus is that a value of $\sqrt 2$ should be used, but when I use a value of 10 it works, which save me a lot of time.
So, how can I find the best value for $C$, that best suits my problem?