This page explains how Ed Warwick (USATT# 10943)'s rating went from 1565 to 1563 at the Fools of April held on - 19 Apr 1998. 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.