This page explains how Seyed H Saadat (USATT# 26888)'s rating went from 1944 to 1849 at the 2015 Butterfly MDTTC Open held on - 24 Oct 2015. 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.