This page explains how Olalekan Ogunsakin (USATT# 220480)'s rating went from 1306 to 1305 at the Rose City Sanction League December 9th held on 9 Dec 2017 - 9 Dec 2017. 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.