This page explains how Jim A. Engstrom (USATT# 70172)'s rating went from 1541 to 1535 at the WMITT event from 16 Nov 2017. 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.