This page explains how Richard J. Chen (USATT# 203134)'s rating went from 1658 to 1655 at the LATTA Butterfly Open July 2023 held on 29 Jul 2023 - 29 Jul 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.