This page explains how Guillaume Muller (USATT# 277458)'s rating went from 1090 to 1089 at the LYTTC April Open 2024 held on 13 Apr 2024 - 14 Apr 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.