This page explains how Nobuyuki Shiogai (USATT# 26208)'s rating went from 1981 to 1983 at the Sky High Summer Open held on - 28 Jun 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.