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Fri 05 May 2007The king of the puzzle palaceThe father of sudoku, Maki Kaji, took the inspiration for his company from an Irish horse, and no numbers game can ever compete with a day at the races, he tells David McNeillAffable, chain-smoking, and slightly dishevelled in jeans and a sports-jacket, Maki Kaji is an unlikely corporate titan and happily admits he would rather be hanging around a racetrack betting on nags than plotting global domination. But for Japan's puzzle king and, as his business card proudly states, the father of sudoku, world domination is now very much on the agenda.