This page explains how Stu R. Kroll (USATT# 7429)'s rating went from 2030 to 2021 at the Long Island's Woodbury Table Tennis League event from 12 Nov 2013. 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.