This page explains how Jude Lam (USATT# 217509)'s rating went from 1657 to 1626 at the 2023 Butterfly Cary Cup held on 27 Apr 2023 - 30 Apr 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.