This page explains how Karina Zenke (USATT# 250281)'s rating went from 884 to 883 at the 2019 South Bay Spring / Summer event from 7 Oct 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.