This page explains how Glenn Wambold (USATT# 12851)'s rating went from 993 to 990 at the AZ PTTC Monday event from 1 Apr 2019. 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.