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Ulf Andersson is a leading Swedish chess player. FIDE awarded him the International Master title in 1970 and the Grandmaster title in 1972.

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László Bárczay was a Hungarian chess Grandmaster.

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Michel Caillaud is a French chess problemist.

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Aivars Gipslis was a Latvian chess FIDE Grandmaster and also an ICCF Grandmaster, and a chess writer and editor.

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Curt Hansen is a Danish chess grandmaster and a former World Junior Champion. He is a six-time Danish Champion.

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Jonny Hector is a Swedish chess grandmaster.

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Jānis Klovāns was a Latvian chess Grandmaster. He was a career officer in the Soviet Army.

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Rafael Duailibe Leitão is a Brazilian chess player. He is a grandmaster in both over-the-board chess and correspondence chess. Leitão is a seven-time Brazilian champion. He competed in the FIDE World Championship in 1999, 2000 and 2004 and in the FIDE World Cup in 2005, 2007, 2009, 2013 and 2015.

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Andrew Jonathan Mestel is Professor of Applied Mathematics at Imperial College London. He worked on magnetohydrodynamics and biological fluid dynamics. He obtained his Ph.D. with the thesis "Magnetic Levitation of Liquid Metals" at University of Cambridge.

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John Denis Martin Nunn is an English chess grandmaster, a three-time world champion in chess problem solving, a chess writer and publisher, and a mathematician. He is one of England's strongest chess players and was formerly in the world's top ten.

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Albéric Joseph Rodolphe Marie Robert Ghislain O'Kelly de Galway was a Belgian chess Grandmaster (1956), an International Correspondence Chess Grandmaster (1962), and the third ICCF World Champion in correspondence chess (1959–1962). He was also a chess writer.

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Jonathan Penrose, is an English chess Grandmaster (1993) and International Correspondence Chess Grandmaster (1983) who won the British Chess Championship ten times between 1958 and 1969. He is the son of Lionel Penrose, a professor of genetics, the grandson of the physiologist John Beresford Leathes, and brother of Roger Penrose, Oliver Penrose, and Shirley Hodgson. He is a psychologist and university lecturer by profession, with a PhD.

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Kacper Piorun is a Polish chess grandmaster, a five-time world champion in chess problem solving, and two-times winner of the Polish chess championship.

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Viacheslav Vasilyevich Ragozin was a Soviet chess player, writer and editor. He was world champion in correspondence chess and held the title of Grandmaster in both over-the-board and correspondence chess.

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Lothar Maximilian Lorenz Schmid was a German chess grandmaster. He was born in Radebeul near Dresden into a family who were the co-owners of the Karl May Press, which published the German Karl May adventure novels.

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Andrey Selivanov is a Soviet and Russian politician and chess problemist. Russian State Duma deputy (1993-2003).

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Bogdan Śliwa was a Polish chess master.

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Bojan Vučković is a Serbian chess Grandmaster.