Dee ihe na-aga n'ihu maka paragraf a - Petrosian nwetara aha nna ukwu ya site n'itinye ụkpụrụ na asọmpi egwuregwu ụwa nke ndị na-erubeghị afọ 18 na 2002, Batumi Open na 2003, na Aeroflot Open na Moscow na 2004. N'otu afọ ahụ, ya na Zhao Jun jikọrọ maka 2nd-3rd na World Junior Chess Championship na Kochi, India. N'afọ 2005, o jikọtara nke mbụ na Tehran, Kish na Lausanne; n'afọ 2006 jikọtara nke mbụ na Lyon na Dubai; n'afọ 2008 jikọtara nke mbụ na Wheeling, Illinois na Las Vegas. N'otu afọ ahụ ọ meriri ọla edo otu (ya na Levon Aronian, Vladimir Akopian, Gabriel Sargissian na Artashes Minasian) na 38th Chess Olympiad
na Dresden. N'afọ 2011, Petrosian jikọtara maka 1st <unk> 3rd na Marat Dzhumaev na Anton Filippov na Georgy Agzamov Memorial na Tashkent wee merie ihe omume ahụ na tie-break. N'otu afọ ahụ ọ meriri asọmpi mbụ nke Armenia Chess960, jikọtara ya na Abhijeet Gupta na Magesh Panchanathan maka 2nd <unk> 4th na asọmpi atọ nke Orissa International GM Open Chess Tournament wee bụrụ onye mbụ na 31st Villa de Benasque Open. Na Jenụwarị 2012 Petrosian meriri Armenia Chess Championship na February 2012 bịara nke mbụ na Armenia Rapid Championship. Na Jenụwarị 2013 ọ meriri Armenia Chess Championship maka oge nke abụọ. O ritekwara ihe nrite nke mbụ na International "Grand Europe Open Albena-2013" na Bulgaria. N'afọ 2017, o meriri nke mbụ na 45th Annual World Open na Philadelphia.