This page explains how Xiaozhen Li (USATT# 229379)'s rating went from n/a to 250 at the Spttc Saturday Night League event from 4 Aug 2018. 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.