This page explains how Chris Lewan (USATT# 97561)'s rating went from 1360 to 1339 at the NW LA Open held on - 15 Nov 2015. 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.