This page explains how Andy Pelshe (USATT# 33239)'s rating went from 1560 to 1546 at the Spin Open held on - 4 Apr 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.