This page explains how Ethan Guo (USATT# 271320)'s rating went from 1151 to 1131 at the 888 League event from 26 Mar 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.