This page explains how Olivia Lu (USATT# 1171351)'s rating went from 890 to 879 at the Texas Open Tournament @ Texas Wesleyan held on 11 Dec 2021 - 11 Dec 2021. 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.