This page explains how Kash Noorani (USATT# 216131)'s rating went from 2020 to 2013 at the ICC - Advanced League event from 21 Nov 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.