This page explains how Hiroshi Koshimoto (USATT# 59772)'s rating went from 1365 to 1350 at the Hawthorne/Northrop Open held on - 13 Mar 1994. 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.