This page explains how Yi Gu (USATT# 54085)'s rating went from 2023 to 1969 at the LYTTC Friday Pro League event from 23 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.