This page explains how David J. Roddick (USATT# 70987)'s rating went from 589 to 589 at the 2024 Butterfly Chinese New Year Tournament held on 18 Feb 2024 - 18 Feb 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.