This page explains how Felix Shtorper (USATT# 15550)'s rating went from 1909 to 1897 at the TT&M August Open 2017 held on 19 Aug 2017 - 20 Aug 2017. 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.