From 1976 to 1996, he played in eleven consecutive Chess Olympiads. His overall Olympiad score is 73/122 (+44–20=58).[8] He also competed in two European Team Chess Championships (1992 and 2015), with an overall score of 7½/15 (+3–3=9);[9] and one World Team Chess Championship (1993), scoring 4/7 (+2–1=4).[10] In 2016, he participated in the 50+ group of the World Senior Team Chess Championship, scoring 6/8 (+4–0=4).[11]
Margeir is the No. 6 ranked Icelandic player as of September 2020, with a rating of 2475.[12]
Business career
After eight years as a professional chess player, Margeir founded a securities company in 1999. This company lost money due to the dot-com crash but survived and in 2003 he converted it into an investment bank, naming it MP Bank after it obtained its commercial license. MP Bank was the only Icelandic commercial bank that did not crash during the financial crisis of 2007–08.[13][14] It was sold to a group of Icelandic and foreign investors in 2011; as of 2015, Margeir is one of Iceland's wealthiest citizens.[15]
In 2006, Margeir bought Bank Lviv, which is ranked 44th among the 88 Ukrainian banks in terms of assets as of October 2017. In February 2018, he acquired a 99.8% stake in the Lviv-based financial company Integral Investments.[16]
^Rogers, Ian (August 2015). "The Grandmaster Who Rode the Financial Tiger". 50 Moves Magazine. p. 51. Now 55, Petursson is one of Iceland's richest citizens.