KenKen has quickly become the successor to sudoku that the world's been
waiting for! KenKen became the first puzzles to be printed in the daily
editions of the New York Times next to its famous crossword puzzle.
This New York Times edition of KenKen contains 300 easy to hard 4x4 and
6x6 size puzzles with "How to Solve" instructions and an introduction by
puzzlemaster Will Shortz. The puzzles use all four mathematical
operations and increase in difficulty like they do in the Times.