This page explains how Sandra Zerner (USATT# 270926)'s rating went from 661 to 687 at the Huntsman World Senior Games 2023 held on 9 Oct 2023 - 12 Oct 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.