Sudoku on the R3 train

Posted on Thursday, Oct 01, 2009
Puzzlemaster Will Shortz took to the rails Thuirsday morning to give riders some Sudoku tips in advance of this month's Philadelphia Inquirer Sudoku National Championship, set for Oct. 24 at the Pennsylvania Convention Center. The championship offers a wide variety of categories so nearly anyone can enter the competition. The grand prize for the winner in the advanced category is $10,000.