This page explains how Rigel Galgana (USATT# 1165491)'s rating went from 1661 to 1660 at the 2024 USATT Massachusetts State Championships held on 19 May 2024 - 19 May 2024. 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.