This page explains how Dariah Feng (USATT# 224231)'s rating went from 1564 to 1560 at the ICC - Advanced League event from 31 Oct 2020. 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.