This page explains how Oishik Mukherjee (USATT# 216430)'s rating went from 870 to 900 at the Westchester 2018 held on 27 Jan 2018 - 28 Jan 2018. 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.