This page explains how John R. O'Neal (USATT# 8835)'s rating went from 1505 to 1493 at the Wisner Open held on - 19 Mar 1995. 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.