This page explains how Johan Alfredsson (USATT# 1177540)'s rating went from 1463 to 1458 at the SATTA May 2023 Open held on 21 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.