This page explains how Donald B. Hayes (USATT# 50664)'s rating went from 2046 to 2065 at the Waltham January Open RR held on - 28 Jan 1996. 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.