This page explains how Haiyan Cheng (USATT# 71436)'s rating went from 1193 to 1143 at the PPC 2024 Winter Open held on 20 Jan 2024 - 21 Jan 2024. 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.