This page explains how Nicholas R. Gangi (USATT# 28145)'s rating went from 1247 to 1239 at the MATTBC Open held on - 11 Apr 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.