This page explains how Nicholas Wetzler (USATT# 61233)'s rating went from 832 to 820 at the MATTC Septemter Open held on - 28 Sep 1997. 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.