This page explains how Nelson Yu (USATT# 65178)'s rating went from 2040 to 2029 at the ICC Juniors and Adults League event from 28 Apr 2008. 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.