This page explains how ILIYAN ARABOV (USATT# 82489)'s rating went from 1280 to 1288 at the B'Nets Fall '09 SGLS.LGE event from 9 Nov 2009. 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.