This page explains how Umut Ozkalyoncuoglu (USATT# 229613)'s rating went from 1913 to 1891 at the LATTA Open February 2020 held on 22 Feb 2020 - 22 Feb 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.