This page explains how Mahadevan Arivazhakan (USATT# 97451)'s rating went from 1591 to 1559 at the ICC - Advanced League event from 28 Jan 2023. 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.