This page explains how Michael Lai (USATT# 216722)'s rating went from 1369 to 1319 at the 2023 ICC JOOLA Winter Open held on 2 Dec 2023 - 3 Dec 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.