This page explains how Narasimhan Ramakrishnan (USATT# 25608)'s rating went from 1978 to 1969 at the 2023 S & T Transport Open held on 21 Oct 2023 - 22 Oct 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.