This page explains how Jonathan Qin (USATT# 92665)'s rating went from 1987 to 1930 at the AZ PTTC Monday event from 8 Aug 2016. 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.