This page explains how Hiroko Kimura (USATT# 83151)'s rating went from 1520 to 1551 at the Magic Spin Lunar New Year Open held on - 15 Feb 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.