This page explains how Paul Wayne Lewis (USATT# 7743)'s rating went from 1563 to 1558 at the 2015 South Shore Butterfly Open held on - 25 Oct 2015. 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.