An easy 4x4 KenKenKenKen, which began appearing in The New York Times in February, is a new numerical logic puzzle from Japan. The name means loosely “cleverness squared.”

KenKen shares some properties with sudoku. Each is a pure logic challenge in which numbers are filled in the squares of a grid. Unlike sudoku, though, in which the numbers act solely as symbols (letters or pictures would work as well), KenKen requires arithmetic.

The rules are simple: Fill the grid with digits so as not to repeat a digit within any row or column, and so the digits within each heavily outlined box (called a cage) go together using the arithmetic operation shown to make the target number indicated.

Published by


Who I Am ePeterso2I’m Eric Peterson, and my email address is I’m a software engineer who lives in a suburb of Fort Lauderdale, Florida. I’ve enjoyed solving puzzles for years, and a few years ago I began constructing puzzles of my own. If you’re ever in Broward County and would like to get together some time, please send me a note by email and let me know. I love the opportunity to meet with other puzzleheads, especially if it involves lunch. Puzzle Testing I believe that the best way to make a puzzle even better is to ask someone else to solve it. You learn so much about how people think, how people approach your puzzle, pitfalls they may encounter, and outright errors in your construction by having someone else try it before you unleash it upon the world. If you’re a puzzle constructor, I would be honored to test your puzzle for you. Send me email with your puzzle or a link to it, and I’ll try solving it, as long as I have time available to do so. I’m a busy guy, so my time is limited … but I’m always open to a challenge. My Public Profiles * My Linked In profile * My profile * My profile Puzzles I’ve Written * Geocaching puzzles Puzzles I’ve Solved * Geocaching puzzles (solved and found) What Happened to ePeterso1? ePeterso1 was a horrible experiment gone wrong that had to be hunted down and killed before he claimed the lives of any more innocent victims. Most of the bugs that caused ePeterso1 to go haywire have been corectted in ePeterso2.

2 thoughts on “KenKen”

Leave a Reply