This page explains how Stephen Yatvitskiy (USATT# 94739)'s rating went from 2056 to 1989 at the Westchester March 2019 Open held on 30 Mar 2019 - 31 Mar 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.