This page explains how Nathan Lee (USATT# 92628)'s rating went from 2169 to 2121 at the 2017 JOOLA LA Open Tournament held on 2 Sep 2017 - 3 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.