This page explains how Daniel R. Seemiller (USATT# 9870)'s rating went from 2400 to 2397 at the South Shore Sports/Butterfly Open held on - 13 Nov 2011. 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.