This page explains how Parvinder Singh (USATT# 1173378)'s rating went from 1948 to 1938 at the BTTC League event from 10 Sep 2019. 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.