This page explains how Mel Melchner (USATT# 134863)'s rating went from 1555 to 1455 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.