This page explains how Girish Siddaganganna (USATT# 270131)'s rating went from 1599 to 1591 at the 2023 USATT California State Championships held on 7 Oct 2023 - 9 Oct 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.