Dutch chess Grandmaster (2011). Best results: Peak rating: 2538 in July 2011

Israeli chess Grandmaster (2014). European Youth Champion – under 16 (2012). European Youth Champion – under 18 (2014). Best results: National Championship Final 2016 in Tveria, 3rd; Israel Rapid Championship 2017 in Kfar Vradim, 2nd. Peak rating: 2565 in September 2017

Ukrainian chess Grandmaster (2015) is born in Oleksandrivka, Ukraine. World Youth Chess Champion – under 18 (2014). Best results: World Youth Chess Championships 2014 – under 18, 1st; 12th V. Nabokov Memorial – GM 2015 in Kyiv, 1st; 11th Tashkent Open, Agzamov Memorial (Group A), 1st; Vladimir Petrov memorial blitz 2016 in Jurmala, 1st; European

Finnish chess Grandmaster (honorary, 1984). Finnish chess champion five times. He represented his country six times in the Chess Olympiad Best results: Nordic Championship 1947 in Helsinki, 1st-2nd; Interzonal Saltsjöbaden 1948 (category 14th), 11th; Böök also wrote several chess books. Peak rating: –  

Dutch chess Grandmaster (2014) is born in Lelystad, Netherlands. Best results: Schaakfestival Groningen 2013 Open A, 1st-4th; London Chess Classic 2015, 1st; 13th BPB Limburg Open 2019 – Group A in Maastricht, 1st; Peak rating: 2645 in July 2019

Russian chess Grandmaster (2003) is born in Novosibirsk, Russia. Best results: Cappelle-la-Grande Open 2003, 1st-6th; 14th Abu Dhabi Chess Festival 2004 – Masters tournament, 1st; 14th Chigorin Memorial 2006 in Saint Petersburg, 1st; 10th World University Chess Championship 2008 in Novokuznetsk; 11th Dubai Open 2009, 2nd; Chigorin Memorial 2011, 1st; Primorsky Debut 2014, 1st; Russian

German chess Grandmaster (2015) is born in Lemgo, Germany. Best results: European Youth Team Chess Championship 2015, team 1st; World Junior Chess Championship 2015, 3rd; Grenke Chess Open 2016, 1st; Accentus Young Masters, 1st; Xtracon Chess Open 2016, 1st; Berlin Open 2019, 1st; He is a member of the German National Team. Peak rating: 2646

Bangladeshi chess Grandmaster (2007) is born in Barguna, Bangladesh. Best results: Mercantile Bank 35th National Chess Championship-2009, Final Phase, 2nd; Asian Zonal 2013, Zone 3.2 in Colombo, 2nd; He played for Bangladesh in seven Chess Olympiads from 1994 to 2006. Peak rating: 2492 in July 2005  

Georgian chess Grandmaster (2013). European Youth Chess Champion – under 14 (2005). Best results: World Youth Chess Championship 2001 – under 10, 2nd; European Youth Chess Championship 2004 – under 14, 3rd; European Youth Chess Championship 2005 – under 14, 1st; European Youth Chess Championship 2009 – under 14, 3rd; 3rd International Golden Apricot Chess

American chess Grandmaster (2018) is born in Centro Habana, Havana, Cuba. Cuban Chess Champion (1996 and 1998). Best results: II La Vega Open Internacional 2009, 1st; Miami Open and Florida State Championship 2009, 1st; Internacional Copa AES Dominicana 2010, 3rd; 2nd Annual Philadelphia Open in Philadelphia, 2nd; UTD Spring GM Invitational sponsored by Turner Construction