This page explains how Peter Mok (USATT# 59572)'s rating went from 1621 to 1578 at the Meiklejohn Nat'l Seniors TTT held on - 8 Jun 1997. 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.