This page explains how Hanson Qin (USATT# 81606)'s rating went from 1530 to 1504 at the Intermediate League event from 31 May 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.