Number Puzzle International Championship in Philadelphia
by KYW's Hadas Kuznits
Sudoku players have converged on Philadelphia for an international competition this Friday and Saturday.
It might look more like an SAT exam than a contest, but people from all over the world are participating in the World Sudoku Championship in Philadelphia. That's the puzzle game (right) in which you have to fill in digits in a 9 x 9 grid according to certain rules.
Director Will Shortz (right):
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