KenKen® - Brain Training Puzzle Train your brain with KenKen®, the unbelievably fun, exciting and addictive logic and math puzzle! KenKen is an amazing puzzle that is frequently described as “sudoku on steroids.” If you like other brain games such as sudoku, 2048, Threes, Kakuro, Unblock Me, Tricky Test, Tetris, Flow, jigsaw puzzles, word search puzzles, or crossword puzzles, then you will LOVE KenKen! This is the ONE-AND-ONLY Original KenKen app, created by acclaimed Japanese mathematics educator Tetsuya Miyamoto. Don’t be fooled by unauthorized versions such as mathdoku and calcudoku, and don't get stuck in a sudoku rut. Play KenKen math puzzles today! KenKen appears daily in the New York Times and hundreds of other publications around the globe. NY Times puzzle editor, Will Shortz, calls KenKen "the most addictive puzzle since sudoku." There are virtually unlimited KenKen puzzles available to you on this app. The first 50 are included FREE with the download. If you need more...no problem! Just order them and they'll appear immediately. YOU select the size, difficulty level, and operations. KenKen Classic includes: - 50 FREE fun math puzzles of every size and difficulty level - Unlimited FREE 3x3 size puzzles to learn from and enjoy - Virtually unlimited puzzles, ranging from 3x3 to 9x9 grids, from Easy to Expert - A variety of color schemes and music (you can even set your own music to play in the background) - 3 input modes for digits and notes - Great extra features such as Hints, Check, Undo, Redo, Reset, Pause, and Timer - Online leaderboards - Ability to post results directly to Twitter - Ability to email results and invite friends