This page explains how Spenser Minh M. Lam (USATT# 25844)'s rating went from 2138 to 2105 at the Morton Grove Winter Open 1 Star held on - 5 Jan 2013. 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.