This page explains how David Xiao (USATT# 222393)'s rating went from 1230 to 1287 at the 2018 Virginia State Championships held on 16 Jun 2018 - 17 Jun 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.