This page explains how Sharath Bellulli Amarnath (USATT# 97005)'s rating went from 1664 to 1648 at the Swan Sunday League event from 15 Dec 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.