This page explains how Xizi (stephanie) Sun (USATT# 92947)'s rating went from 2155 to 2142 at the HI Friday event from 14 May 2016. 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.