John Grantley Cooper (natawo 14 Mayo 1954) mao ang usa ka Welsh chess International Master (IM) (1984), napulo ka-time Welsh Chess Championship mananaog (1976, 1977, 1978, 1984, 1985, 1992, 1993, 1994, 1995, 1996), duha ka-time Chess Olympiad indibidwal nga plata medalya mananaog (1976, 1984
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