This page explains how Timothy Richard Doerr (USATT# 5407)'s rating went from 1431 to 1421 at the WMITT event from 11 Oct 2018. 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.