This page explains how Fumio Yoshikawa (USATT# 11352)'s rating went from 1664 to 1683 at the Huntsman World Senior Games held on - 16 Oct 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.