<prompt> Tlatša polelo ye e latelago: John Grantley Cooper yo a belegwego ka la 14 Mei 1954 ke Welsh chess International Master IM 1984, mofenyi wa makga a lesome wa Welsh Chess Championship 1976, 1977, 1978, 1984, 1985, 1992, 1993, 1994, 1995, 1996, mofenyi wa makga a mabedi wa sefoka sa silifera sa Chess Olympiad  <response>: 1976, 1984. 