This page explains how Karl Eisenkoelbl (USATT# 94837)'s rating went from 1673 to 1660 at the HITTA Weekly League event from 20 Jan 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.