This page explains how Abhinav Gunda (USATT# 89194)'s rating went from 590 to 580 at the Sacramento Summer Open held on - 17 Aug 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.