This page explains how Josh Bornstein (USATT# 10143)'s rating went from 1642 to 1634 at the California Open 2023 held on 19 Aug 2023 - 19 Aug 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.