This page explains how Martin Sundel (USATT# 13660)'s rating went from 1344 to 1461 at the Butterfly/BCC May Open held on - 15 May 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.