This page explains how Andy Zhang (USATT# 216349)'s rating went from 2020 to 1998 at the TTA Adv League - SUNDAY event from 28 Aug 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.