This page explains how Songchen Xia (USATT# 98325)'s rating went from 1975 to 1972 at the LYTTC TTcup event from 26 Apr 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.