This page explains how Irving Adams (USATT# 30606)'s rating went from 1871 to 1848 at the NJTTC Thursday Adv League event from 11 Feb 2016. 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.