This page explains how Min (winnie) Zhang (USATT# 219402)'s rating went from 1847 to 1847 at the 2023 TTA BUTTERFLY BAY AREA OPEN held on 1 Apr 2023 - 2 Apr 2023. 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.