This page explains how Paul Chang (USATT# 25587)'s rating went from 1655 to 1649 at the ICC JOOLA Spring Open held on 4 Mar 2023 - 5 Mar 2023. 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.