This page explains how Jia-Yu Sung (USATT# 82230)'s rating went from 1265 to 1223 at the SVTTC Sunday U2000 event from 27 May 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.