This page explains how Andrew Zhou (USATT# 202548)'s rating went from 1912 to 1901 at the $3K ASLT Oktoberfest held on 22 Oct 2021 - 24 Oct 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.