This page explains how Hao Zhang (USATT# 271879)'s rating went from n/a to 1280 at the Spttc Saturday Night League event from 16 Oct 2021. 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.