This page explains how Yong Long Zhen (USATT# 74869)'s rating went from 2170 to 2180 at the Sacramento Spring Open held on - 18 Apr 2015. 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.