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This is the ONE-AND-ONLY Original KenKen®, the exciting and addictive logic and math puzzle that appears daily in the New York Times. NY Times puzzle editor, Will Shortz, calls KenKen the "most addictive puzzle since sudoku".

KenKen is the only version of this puzzle authorized by its creator, Japanese educator Tetsuya Miyamoto, and that guarantees only one solution. Don't be fooled by unauthorized versions such as mathdoku and calcudoku.

There are unlimited KK Puzzles available to you on this app. The first 31 are included with the download. If you need more, no problem, just order more puzzles. YOU select the size, difficulty level and operations. When you complete a set, new puzzles automatically load when you're internet connected.

What is KenKen? it is a grid-based logic puzzle and math game that is frequently described as "sudoku on steroids".

How to solve KenKen?
It’s as EASY as tic-tac-toe: For a 3x3 puzzle, fill in with numbers 1-3; for a 4x4 puzzle, fill in with numbers 1-4; for a 5x5 puzzle, fill in with numbers 1-5, and so on. Do not repeat numbers in any row or column. An interactive tutorial is available to learn how to solve KenKen.

A Little KenKen History
KENKEN was developed in 2004 by… no, not two guys named Ken… it was acclaimed Japanese mathematics instructor Tetsuya Miyamoto. His goal was to improve his students’ math and logic skills. And what better tool than a puzzle? So he developed one that would be understandable, fun, and challenging for any level of student. Most importantly, he wanted the puzzle to encourage independent thinking, emphasizing trial and error, concentration, and perseverance. Mr. Miyamoto’s educational philosophy boils down to “The Art of Teaching Without Teaching.™” His methods and puzzle were immediately successful.


Premium Edition Includes:

-31 puzzles of your choice to play. Choose size, difficulty and operations
-3x3 size is always free
-Variety of selection of puzzles from 3x3 to 9x9, easy to expert.
-Select color scene, avatar and music
-3 modes for input of digits and notes
-Many features such as Hints, Check, Undo, Redo, Reset, Pause, Timer
-Online leaderboards
-Post results directly to Facebook and Twitter
-Email result and invite friends
-Interactive tutorial
-KenKen Store

From version 1.2:
- critical bug fixes
- freezing app issue fixed

- disable/enable puzzle solving timer
- pinch to zoom puzzle
- multiple possible/impossible notes entry
(tap and hold possible/impossible note button to activate)
- lock lower bar to prevent accidental dismiss (Settings)