This page explains how Yong Zhang (USATT# 211935)'s rating went from 1785 to 1722 at the Spttc Saturday Night League event from 4 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.