This page explains how Kai Zhang (USATT# 86637)'s rating went from 2601 to 2596 at the NJTTC 2012 December Open held on - 9 Dec 2012. 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.