This page explains how Don Richer (USATT# 77292)'s rating went from 1187 to 1143 at the El Paso Summer Slam IV held on - 1 Sep 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.