How to convert The English scoring to python code ?

There are two scoring systems commonly used in squash: Point-a-rally scoring (PARS) The winner of each rally always receives a point (regardless of whether they were the server or re- turner). The first player to reach at least 11 points and be ahead by at least 2 points wins the game. If the server wins a rally, they continue as server. If the returner wins a rally, they become the server. English scoring Only the server is awarded a point if they win a rally. If the server wins a rally, they receive a point and continue as server. If the returner wins a rally, they become the server but don't receive a point. The first player to reach 9 points wins the game unless the score has reached 8-8. If the score reaches 8-8, the player who reached 8 first decides whether to play to 9 or to 10. Modelling playing ability Assume a player A's ability is represented by an integer value r A such that 0