This page explains how Chi W. Lam (USATT# 61680)'s rating went from 1916 to 1883 at the Rockwell Summer Open 2015 held on - 27 Jun 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.