This page explains how Bret Bohlman (USATT# 217233)'s rating went from 1217 to 1537 at the SpinBlock Giant Round Robin 2020 held on 25 Jan 2020 - 25 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.