This page explains how Chi W. Lam (USATT# 61680)'s rating went from 1861 to 1846 at the 2012 MN State Table Tennis Championships held on - 5 Feb 2012. 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.