This page explains how Carl R. Danner (USATT# 5206)'s rating went from 2017 to 1971 at the ICC Juniors and Adults League event from 17 Nov 2008. 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.