This page explains how Q S Wang (USATT# 83179)'s rating went from 2031 to 2029 at the Westchester 2013 December Open held on - 15 Dec 2013. 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.