This page explains how Koki Nabeya (USATT# 271735)'s rating went from 1623 to 1589 at the 2023 USATT Midwest Regional Championships held on 19 May 2023 - 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.