This page explains how Eric Chang (USATT# 1173457)'s rating went from 1229 to 1263 at the LATTA Butterfly June Open held on 22 Jun 2024 - 22 Jun 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.