. "Grenke Chess Classic" . "4th Grenke Chess Classic" . "2015 Grenke Chess Classic" . "4th GRENKE Chess Classic" . . . "Grenke Chess Classic" . "Baden-Baden" . "2nd Grenke Chess Classic" . "Grenke Chess Open" . . "5th Grenke Chess Classic" . . . . "2013" . "Grenke Chess Classic#2018" . . . . "5th GRENKE Chess Classic" . . . . . . . . . "6th Grenke Chess Classic" . . "GRENKE Chess Open" . "3rd GRENKE Chess Classic" . "6th GRENKE Chess Classic" .