This page explains how Chi-Sun Chui (USATT# 4879)'s rating went from 2480 to 2476 at the Long Island September Open Cha held on - 26 Sep 1999. 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.