This page explains how Jozef Simkovic (USATT# 80797)'s rating went from 1436 to 1426 at the 2011 Butterfly MDTTC April Open held on - 10 Apr 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.