This page explains how Stefan Choy (USATT# 1172085)'s rating went from 1362 to 1255 at the LYTTC October Giant RR 2021 held on 16 Oct 2021 - 17 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.