An excel spreadsheet set up for you to be able to enter in team/player names, who beat whom, and then be able to instantly track who is at the top of the power rankings. The formula not only keeps track of how many wins and losses each team/player has, but also takes into account who they beat and gives more points to the teams/players that have wins against better teams/players. If you are a coach or a club advisor, this can be very helpful - I use it personally for my tennis team and chess clu