This page explains how Keenan Zhou (USATT# 95558)'s rating went from n/a to 689 at the January 2015 NW LA Open held on - 18 Jan 2015. 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.