This page explains how Piotr Juszkiewicz (USATT# 217739)'s rating went from 1891 to 1921 at the Kansas Table Tennis Winter Open Tournament held on 1 Feb 2019 - 3 Feb 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.