This page explains how Yahao Zhang (USATT# 31038)'s rating went from 2489 to 2498 at the Newgy Snake Seed At Westlake held on - 19 May 2012. 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.