This page explains how Wenyan Drake (USATT# 81064)'s rating went from 1284 to 1269 at the 2013 Missouri Winter Games Open held on - 9 Feb 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.