This page explains how Yuyang Ying (USATT# 90630)'s rating went from 1988 to 1989 at the ICC - Advanced League event from 12 Feb 2022. 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.