This page explains how Koki Nabeya (USATT# 271735)'s rating went from 1661 to 1660 at the 58th St. Joseph Valley Open held on 18 Mar 2023 - 19 Mar 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.