This page explains how Yoo Pou Sang (USATT# 25337)'s rating went from 1938 to 1959 at the Spttc Saturday Night League event from 9 Oct 2021. 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.