This page explains how Galaxy Deka (USATT# 1172792)'s rating went from 642 to 638 at the Butterfly Spin &Smash February Open held on 4 Feb 2022 - 6 Feb 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.