This page explains how Chenguang Zhu (USATT# 91100)'s rating went from 2002 to 1993 at the Spttc Saturday Night League event from 2 Apr 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.