This page explains how Diyan Shah (USATT# 219347)'s rating went from 1659 to 1659 at the 2021 National U19 and U15 team trials (additional U11, U13 & U17 rating events) held on 3 Jun 2021 - 6 Jun 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.