This page explains how Long Zheng (USATT# 83634)'s rating went from 1928 to 1920 at the Rhode Island Table Tennis Association Spring Open 2013 held on - 14 Apr 2013. 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.