This page explains how Jonathan Head (USATT# 14620)'s rating went from 1337 to 1374 at the 1998 US Open held on - 5 Jul 1998. 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.