This page explains how Joanna Sung (USATT# 82231)'s rating went from 1924 to 1981 at the ICC STIGA California Open held on - 3 May 2015. 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.