This page explains how R. M. Muramoto (USATT# 8549)'s rating went from 1644 to 1642 at the Rialto Spring Open held on - 9 Apr 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.