This page explains how Sean Patrick O'Neill (USATT# 8840)'s rating went from 2556 to 2557 at the 3rd Ann. 1996 Oded Amitz-Lev M held on - 5 Oct 1996. 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.