This page explains how Preston Nichols (USATT# 271121)'s rating went from 845 to 786 at the 2023 Arizona State Championships held on 29 Jul 2023 - 30 Jul 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.