This page explains how Tom Lackaff (USATT# 4387)'s rating went from 1954 to 1943 at the NJTTC Monday League event from 7 May 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.