This page explains how Irvin Martin (USATT# 71560)'s rating went from 1658 to 1547 at the 2015 Triangle December Open held on - 5 Dec 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.