This page explains how Collin B. B. Henslee (USATT# 30411)'s rating went from 1897 to 1927 at the 2018 Iowa City Spring Open held on 17 Mar 2018 - 18 Mar 2018. 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.