This page explains how Evelyn Ma (USATT# 272060)'s rating went from 1664 to 1644 at the LYTTC Barry Dattel Memorial Open Jan 2024 held on 13 Jan 2024 - 13 Jan 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.