This page explains how Don Richer (USATT# 77292)'s rating went from 1304 to 1246 at the 2016 Santa Fe Open held on 15 Oct 2016 - 16 Oct 2016. 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.