This page explains how Pui Chak (Jojo) Tam (USATT# 275300)'s rating went from 88 to 56 at the Swan Sunday League event from 26 Mar 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.