This page explains how Gerald R. Naugle (USATT# 8603)'s rating went from 1501 to 1487 at the US Open held on - 4 Jul 2012. 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.