This page explains how Panno Dok (USATT# 59781)'s rating went from 1991 to 1973 at the AZ PTTC Monday event from 24 Apr 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.