This page explains how Ishaan Mahendrakar (USATT# 203084)'s rating went from 863 to 860 at the ICC - Sunday Beginners League event from 17 Apr 2016. 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.