This page explains how Willie Saengdet (USATT# 1176483)'s rating went from 622 to 619 at the NYISC September 2022 Open held on 18 Sep 2022 - 18 Sep 2022. 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.