This page explains how Andrzej Kozan (USATT# 276119)'s rating went from 1848 to 1823 at the US-CHINA PING PONG Diplomacy 50th Anniversary Celebration tournament held on 12 Nov 2022 - 13 Nov 2022. 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.