This page explains how Slawomir Gacki (USATT# 86188)'s rating went from 1890 to 1848 at the Rubber City Fall Open held on - 24 Sep 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.