http://stockfishchess.org/get-involved/

 

Help improve Stockfish by volunteering some of your computer's processor cores to the project! Gary Linscott has built an innovative distributed testing framework called Fishtest. All you need to do is set up Fishtest, and whenever a change is committed to the project repository, your computer can join many others in testing that change by playing thousands of games against an older version to see if the change is an improvement. Interested? View all the current test queue, or add your computer to the pool.
 

http://stockfishchess.org/get-involved/