November 12, 2026
Ovetchkin Roman (16.01.1973)
Russian Grandmaster (2005). Best results: Policka Open (CZE) 1996, 1st; Alushta (UKR) 2004, 1st; Chigorin
Ochoa De Echaguen F. Javier (04.09.1954)
Spanish International Master (1981). President of the Spanish Chess Federation since 2000, FIDE Vice Presidet
Oratovsky, Michael (03.04.1974)
Israeli Grandmaster (2002) born in Moldova and living in Spain. At the age of 13
Mirzoev Azer (28.03.1978)
Azerbaijan Grandmaster who is resident in Spain. Best results: Saint Petersburg White Nights 2000, 1st;
Oleksiyenko Mykhaylo (30.09.1986)
Ukrainian Grandmaster (2005), FIDE trainer (2015). Ukrainian Champion in 2016. Ph.D. in mathematics. Best results: European U16 Championship
Owen Rev. John (01.07.1827 – 24.11.1901)
A strong English player who came in third in Birmingham in 1858 and in London
Olafsson Helgi (15.08.1956)
Icelandic Grandmaster (1985), FIDE trainer (2009). Champion of Iceland in 1978, 1981, 1991, 1993, 1994 and
Munoz, Miguel (10.10.1975)
Spanish Grandmaster (2012) born in Peru. Best results: Open de Ciudad de Tamarite 2005, 1st;
Orlov Andrey (13.03.1977)
Russian Grandmaster (2008). Best results: Prague Open 2005, Torre del Greco IM (ITA) 2006, 1st-2nd;
Peralta Fernando (16.12.1979)
Argentine Grandmaster (2004). Argentine Champion in 2006 and vice-champion in 2002, 2008 and 2013, Argentine U18
Gomez Garrido, Camilo Ernesto
Cuban Grandmaster (2016). Best results: VIII Festival Internacional de Ajedrez of Bogota, 2014; IX
Grigoryan, Karen H.
Armenian Grandmaster (2013), Armenian Champion in 2015, Armenian U14 Champion in 2008, European U16 Champion
Opochensky Karel (07.11.1892 – 16.11.1975)
Czech International Master (1950) and International Arbiter (1951). Czech Champion in 1927, 1928, 1938, 1944.
Olafsson Fridrick (26.01.1935)
Icelandic Grandmaster (1958), the fourth President of FIDE 1978-82. Lawyer. Champion of Iceland in 1952-53,
Ostojic Pedrag (22.03.1938 – 05.07.1996)
Serbian Grandmaster (1975). Moved to Germany in 1985. Twice equal first at the Yugoslavian championships
Lomasov Semen (04.02.2002)
Russian International Master (2016). World U14 champion in 2016, Russian U15 Champion in 2015.
Gledura Benjamin (04.07.1999)
Hungarian Grandmaster (2016). European U10 Championship in 2009. Few times Hungarian Youth Champion. Best results:
Oll Lembit (23.04.1966 – 17.05.1999)
Estonian Grandmaster (1992), Estonian Champion in 1992, USSR U20 Champion in 1984. Best national player
Odeev Handzar (27.01.1972)
Turkmenistan Grandmaster (2004) born in Moscow. Best results: Moscow GM 2003, 1st; Balkan Masters (TUK)
Olland Adolf Georg (13.04.1867 – 22.07.1933)
Dutch leading player at the beginning of the twentieth century. Dutch champion in 1909. Medical
Nikolaidis Ioannis (04.01.1971)
Greek Grandmaster (1995). Greek Champion in 1995 and 2017, runner-up in 1994, 1996, 1998 and 2000.
Kunin Vitaly (02.10.1983)
German Grandmaster (2006). Kunin was born in Russia and he immigrated to Germany in 2001.
Borges Mateos Juan (28.03.1966)
Cuban Grandmaster (2004). Cuba Champion in 1987, 1993 and 1995. Vice Champion of Cuba in
Nisipeanu Liviu-Dieter (01.08.1976)
German Grandmaster (1997) born in Romania. European Champion 2005, German Champion in 2017, Romanian Champion
Nyzhnyk Illya (27.09.1996)
Ukrainian Grandmaster (2011) living in the USA.. Vice World Boys U12 Champion in 2007, European