This page explains how Mark E. Berg (USATT# 6250)'s rating went from 1608 to 1621 at the Westchester April 2021 Little Open held on 24 Apr 2021 - 25 Apr 2021. 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.