This page explains how Yong Long Zhen (USATT# 74869)'s rating went from 2091 to 2080 at the SVTTC Sunday U2000 event from 13 Oct 2013. 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.