This page explains how Thomas H Mann (USATT# 1742)'s rating went from 1393 to 1354 at the 2013 Decatur Open held on - 17 Aug 2013. 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.