This page explains how Lily Zhang (USATT# 31126)'s rating went from 2444 to 2486 at the 2011 Western Open on the JOOLA NA Tour held on - 20 Feb 2011. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.