This page explains how Yuanlei Zhang (USATT# 1167098)'s rating went from 773 to 687 at the ICC - Sunday Beginners League event from 10 Mar 2019. 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.