Raymond Dennis Keene is an English chess grandmaster, a FIDE International Arbiter, a chess organiser, and a journalist and author. He won the British Chess Championship in 1971 and was the first player from England to earn a Grandmaster norm, in 1974. In 1976, he became the second Englishman to be awarded the Grandmaster title, and he was the second British chess player to beat an incumbent World Chess Champion. He represented England in eight Chess Olympiads.

Julio Argentino Kaplan Pera is a Puerto Rican chess player, former world junior chess champion as well as software developer and founder of Heuristic Software.