This page explains how Mabel Chungmai Tam (USATT# 223515)'s rating went from 831 to 741 at the $16,000 Meiklejohn North American Seniors Open held on 1 Jun 2023 - 4 Jun 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.