This page explains how Eric Chang (USATT# 1173457)'s rating went from 1255 to 1229 at the LATTA Butterfly May Open held on 18 May 2024 - 18 May 2024. 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.