Site Frozen for Calendar Year Re-Alignment
It seems that everyone is so excited about the age group realignments that they are jumping the gun and implementing the changes befoe August 1st. I have decided to freeze the rankings as they stand for about a month so I can adjust the software for the new age groups. This is going to be a messy business and there is a real risk of breaking the system if I continue to do updates. Please check back in July for the new rankings for 2016/17.
A ranking systems' accuracy is measured by its "Predictive Power" (how often a higher ranked team beats a lower ranked team). A Predictive Power of 0% is equivalent to flipping a coin. 100% means the rankings always predict the result of a game (impossible given the random nature of the sport). Some ranking systems only rank the top 25 teams in each age group. That is not helpful if you are trying to flight a tournament. "Coverage" is the fraction of all games where both teams are ranked by the ranking system. Here is how the online ranking systems compare today:
This site ranks 133,000 youth soccer teams in the USA based upon the results of 1.1 million games in the last 18 months. The results come directly from more than 350 different tournament or league websites and are the most accurate and complete set used by any ranking system. The rankings are based solely on team results. Every goal in every game is considered when calculating the ranking of each team. Each team is assigned a score that is measured in goals. To predict the goal difference when two teams play each other simply subtract the score of one team from the score of the other. For example, if Denver Rovers (35.6) plays Parker Stars (33.5) then you can expect Denver Rovers to win by about 2 goals. This works across age groups and even when girls play boys!
The rankings are recalculated almost every day, so please check back often. Teams are only listed if they have played 10 games. Sometimes games are split between duplicate teams. I try to fix as many of those as possible. If you spot anything that looks wrong please drill into the team details and click "Report Errors" (at the top right of the screen).
If your team is missing you can view unranked teams here.
I still need to load results from the following sites: www.illowa.org, www.bays.org, www.mnyouthsoccer.org, lijsoccer.com.
Let me know if you spot anything else!