This page explains how Nhat Nam Trinh (USATT# 72249)'s rating went from 2271 to 2144 at the Boston TTC event from 31 Mar 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.