This page explains how Raymond Zhu (USATT# 98266)'s rating went from 1689 to 1690 at the WCTTA Saturday League event from 17 Aug 2019. 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.