This page explains how Sergey Tsvor (USATT# 25053)'s rating went from 1986 to 2000 at the First Slavic event from 19 Nov 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.