This page explains how David Trykall (USATT# 73055)'s rating went from 2026 to 2018 at the MCC Fall Open 2011 held on - 22 Oct 2011. 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.