This page explains how Jim Havens (USATT# 221992)'s rating went from 865 to 859 at the Butterfly Spin &Smash October Open held on 1 Oct 2022 - 2 Oct 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.