This page explains how Chad Su (USATT# 86446)'s rating went from 1813 to 1840 at the 2023 SPTTC October Open & Washington Championships held on 21 Oct 2023 - 22 Oct 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.