This page explains how Peter Boerger (USATT# 43163)'s rating went from 1148 to 1059 at the SpinBlock Monday Night League event from 14 Jan 2020. 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.