This page explains how Jonathan Lamp (USATT# 72970)'s rating went from 1941 to 1928 at the Lexington Open held on 23 Sep 2017 - 24 Sep 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.