This page explains how Oren Zeev (USATT# 216793)'s rating went from 1100 to 1109 at the 888 League event from 28 Nov 2021. 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.