http://bit.ly/2AbEv8g 10 Years of the KenKen Puzzle in The Times Crossword Puzzles, KenKen (Puzzle), Puzzles The game, invented by a Japanese educator to teach students math, has caught on around the world since we first started running it in 2009. WILL SHORTZ http://bit.ly/2BpBGRK February 9, 2019 at 05:30AM
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