This page explains how Wei Luo (USATT# 84908)'s rating went from 1680 to 1677 at the SpinBlock Monday Night League event from 29 Nov 2021. The links below take you to pages that describe various aspects of the ratings processor.

The ratings 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.