This page explains how Nobuyuki Shiogai (USATT# 26208)'s rating went from 1944 to 1890 at the Top Spin Winter Open 2012 held on - 17 Mar 2012. 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.