This page explains how Changlin Ma (USATT# 218797)'s rating went from 1439 to 1457 at the Bay Area Butterfly Championships held on 11 Nov 2023 - 11 Nov 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.