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Analyzed about 3 years ago. based on code collected over 6 years ago.

Project Summary

JRS is a library that ranks players based on their relative performances and uses these rankings for matchmaking and building leaderboards.

The current implementation is based on The Glicko-2 algorthim developed by Professor Mark Glickman at Boston University. (http://math.bu.edu/people/mg/)

Glicko-2 is differentiated from many previous ad-hoc systems in that it is a mathematically rigorous system that treats rankings as hidden statistical variables and attempts to deduce them based on statistical analysis of wins and losses over time.

It has been accepted by the United States Chess Federation and a number of other ranked head-to-head sports as their official ranking system.

Glico-2 in its current form only formally supports 1:1 games. This project will include some experimental ad-hoc n:n support. Professor Glickman has expressed some interest in properly extending Glico-2 to n:n. If/when that happens we will likely move to his solution.

This open source code project has been pursued with the explicit approval of Professor Mark Glickman.



In a Nutshell, Java Ranking Service...

BSD 4-clause (University of California-Specific)

Commercial Use



Place Warranty


Hold Liable

Use Trademarks


Include Copyright

Include License

These details are provided for information only. No information here is legal advice and should not be used as such.

This Project has No vulnerabilities Reported Against it

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2 Other

30 Day Summary

Jun 19 2016 — Jul 19 2016

12 Month Summary

Jul 19 2015 — Jul 19 2016


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