This page explains how Bobby Helm (USATT# 274327)'s rating went from 667 to 663 at the 2023 February Open @ Princeton Pong held on 4 Feb 2023 - 5 Feb 2023. 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.