This page explains how Hiroshi Koshimoto (USATT# 59772)'s rating went from 1589 to 1546 at the High Desert Open held on - 5 Nov 2000. 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.