This page explains how Zach Leifeste (USATT# 275514)'s rating went from 531 to 523 at the HITTA Weekly League event from 21 May 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.