This page explains how Dianren Wei (USATT# 212195)'s rating went from 2563 to 2557 at the ICC - Advanced League event from 1 Oct 2016. 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.