This page explains how Diane Jiang (USATT# 74742)'s rating went from 2189 to 2177 at the ICC - Advanced League event from 2 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.