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The OK Grand Challenge was introduced in 1988, as a flagship marketing campaign for one of the largest supermarket chains running in the country.There is, however, one man who has made a mockery of the OK Jackpot system. Over the years, his name has become synonymous with the OK Grand Challenge. Clemence Muhle from Rusape has won 11 cars through the competition, pushing many into speculation on his ‘lucky’ streak.