This page explains how Gilbert Simons (USATT# 1432)'s rating went from 1286 to 1280 at the MeikleJohn National Seniors held on - 3 Jul 1995. 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.