This page explains how Nhat Nam Trinh (USATT# 72249)'s rating went from 2217 to 2181 at the Boston TTC event from 3 Feb 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.