This page explains how Felix Shtorper (USATT# 15550)'s rating went from 1856 to 1812 at the AZ PTTC Monday event from 23 Nov 2015. 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.