This page explains how Gia Leu (USATT# 17561)'s rating went from 1937 to 1971 at the AZ PTTC Monday event from 14 May 2018. 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.