Turkish International Master (2003) and FIDE Trainer (2005). Best results: 80th Year Republic tournament 2004, 2nd; Heviz Open (HUN) 2006, 1st; Turkish Championship 2007, 2-3rd; 6th MCA Championships 2009, 3-9th; Vasylyshyn Memorial (UKR), 1-3rd; Novi Sad GM 2009, 1st. Since 2002 Erdogdu is a member of the national team which has participated in the Olympiads,

Danish International Master (1950) and International Arbiter (1960). Five times champion of Denmark. A participant in ten Olympiads from 1933 to 1972 with 56% on board 1 in 1952. Best results: 1-3rd at IBM Amsterdam II in 1966. A great blindfold player with an excellent memory and a fine analytic mind,Chess mentioned that on March

Colombian International Master. Between 1965 and 1983 Cuartas won seven times the title of Colombian Champion. Best results: Panamerican Individual 1966, 3-7th; Bogota 1969, 3rd; Capablanca Memorial B (CUB) 1975, 1-3rd; Capablanca Memorial B (CUB) 1976, 3rd; Biel 1980, 2-3rd. A participant in 10 Olympiads between 1964 and 1994. Best ELO: 2440 in 1977.

German International Master (1951) and German Master in 1912. Banker. German Champion in 1934. Won Rostock in 1942 ahead of Klaus Junge. He played for Germany at the 1927 and 1930 Olympiads. A specialist of the Bremen Opening.

Russian International Master (1982), International Arbiter (1993), FIDE Senior Trainer (2010), Chairman of the Trainers’ Council of the Russian Chess Federation since 2003. Trainer of the national junior team from 1967 untill 1992. He worked at a space research institute for many years. Winner of the 1963 Moscow championship, in 1965, he participated in the USSR

German International Master (1953) who won Berlin 1927 ahead of Efim Bogoljubow and Aron Nimzowitsch. Secretary of the German chess federation (1950-1967). Author of more than 30 books includingSchachmaster, wie sie Kampfen und Siegen (1932), Der Angriff in der Schachpartie 1935. Historical ELO: 2470.

Danish International Master (1986). Nordic Champion in 1963 and Danish Champion in 1966, 1970 and 1977. Won Copenhagen Open in 1987, Tastrup II 1992, Copenhagen championship in 1994 and 1996. A participant to 4 Olympiads between 1962 and 1968. Best ELO: 2415 in 1991.

Argentine International Master (1965), the elder brother of Julio. Three times Argentine Champion in 1931, 1935 and 1937 and 3rd in 1946. Several times he played in Mar del Plata tournaments and made his best result in 1934 when he finished 3rd-6th. A participant in the Olympiads of 1935 and 1937.

Swiss International Master (1953) born in Munich. Swiss Champion in 1953, 1955, 1956 and 1967. Best results: Lucerne 1949, 1st; Travemuende 1952, 5th; Hastings 1952-53, 6th; Arleshein in 1961, 1st. A participant in the Olympiads from 1952 till 1968.

Argentine International Master (1959). World Youth Champion in  1959. He disappeared from international chess not long after he won the Mar del Plata II tournament in in 1961. Best results: 3rd in Mar del Plata KIM 1960, 5th in  the Argentine ch. 1961, 3rd in Balcarce 1961, 5th in Santa-Fe 1961 and 4th in Santiago