This page explains how George Siu (USATT# 76618)'s rating went from 2256 to 2252 at the BAPPA Butterfly Championship held on 2 Jun 2023 - 3 Jun 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.