This page explains how Amy Zhang (USATT# 218649)'s rating went from 1961 to 1960 at the TTA Butterfly Bay Area Championships held on 4 Jun 2022 - 5 Jun 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.