This page explains how David DeMay (USATT# 16850)'s rating went from 1559 to 1531 at the Aloha World Table Tennis Tournament held on - 2 Jun 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.