This page explains how Xiao Hua Zhang (USATT# 1177486)'s rating went from 1419 to 1438 at the LYTTC April Open 2023 held on 8 Apr 2023 - 9 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.