This page explains how Lily Zhang (USATT# 31126)'s rating went from 1860 to 1866 at the Northern CA TT League held on - 20 Mar 2007. 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.