This page explains how Lucia Song (USATT# 275036)'s rating went from 1200 to 1110 at the 2023 HITTA Fall Open Tournament held on 7 Oct 2023 - 8 Oct 2023. 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.