This page explains how James Wu (USATT# 218830)'s rating went from 845 to 841 at the 2018 Butterfly Cary Cup Open held on 29 Mar 2018 - 1 Apr 2018. 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.