This page explains how Chui-Chu Lok (USATT# 91890)'s rating went from 524 to 897 at the 2015 Meiklejohn North American Seniors Open Table held on - 7 Jun 2015. 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.