This page explains how Yuewen Zheng (USATT# 281452)'s rating went from 521 to 501 at the Spttc Saturday Junior League event from 11 Nov 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.