This page explains how Nicholas R. Gangi (USATT# 28145)'s rating went from 1331 to 1315 at the Ralph Robinson Memorial Open held on - 18 Apr 1998. 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.