This page explains how Johnny Yam (USATT# 74934)'s rating went from 1581 to 1576 at the Newgy US Open Warm-Up held on - 29 Jun 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.