This page explains how Frank Lackie (USATT# 74986)'s rating went from 1103 to 1079 at the WCTTA Saturday League event from 9 Dec 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.