This page explains how Claire Leung (USATT# 1171346)'s rating went from 1267 to 1261 at the 888 League event from 7 Nov 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.