This page explains how David Xiao (USATT# 222393)'s rating went from n/a to 905 at the 2018 Butterfly WDTTC March Open held on 24 Mar 2018 - 25 Mar 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.