This page explains how Masaru Hashimoto (USATT# 6491)'s rating went from 2189 to 2138 at the US Nationals held on - 19 Dec 1999. 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.