This page explains how Xiangfei Zeng (USATT# 219486)'s rating went from 1969 to 1930 at the 2022 Edgeball Chicago International Table Tennis Open held on 29 Oct 2022 - 30 Oct 2022. 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.