This page explains how Shyam Purohit (USATT# 265236)'s rating went from 2019 to 1971 at the ICC - Advanced League event from 20 May 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.