This page explains how Joshua Zhou (USATT# 275301)'s rating went from 1593 to 1558 at the Spttc Saturday Night League event from 11 Feb 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.