 He was second in the 2011 Armenian Chess Championship, behind Robert Hovhannisyan.In 2012, he finished 3rd in the 74th Armenian championship with a score of 6/10 (+3 -1 = 6).In 2015, Ter-Sahakyan won the Students section of the Moscow Open with 6/9, half a point ahead of Daniil Dubov and finished third on tiebreak with 7/9 at the Karen Asrian Memorial.