This page explains how Basha Shaik (USATT# 217579)'s rating went from 1578 to 1579 at the ICC - Advanced League event from 18 Dec 2021. 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.