*A*, *B* Players

*p* = Probability that *A* wins.

*n* = number of games played

*w* = number of games won by *A*

P(*w* wins in *n* games) = *p ^{w}(1-p)^{(n-w)}*

Maximum Likelihood: If *p* is unknown, it
can be estimated by maximizing the equation above:

*p=w/m*