This page explains how Walter Witkowski (USATT# 21983)'s rating went from 1103 to 1008 at the 2010 Spin Magicians Fremont Fa held on - 7 Nov 2010. 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.