Want KenKen Ad-Free? — FIND OUT MORE    Why do we have ads?

Why are there ads?

We would love to provide everyone an ad-free experience, but we do need to generate revenue to cover at least some of our overhead. We're trying to be as reasonable as possible, and it also allows us to continue to offer you an option to access KenKen puzzles for free. For those who prefer an Ad-Free playing experience, we have an option for just pennies-a-day and it can be canceled anytime. BONUS! KenKen Premium also allows you to Track Your Progress, Join The Leaderboard, Save Puzzles, and more. Please consider this option for the best experience.

In addition, we continue to offer -- pro bono -- our KenKen Classroom Program which provides free KenKen puzzles and lessons to over 1 million students weekly. Revenue we raise from advertisements and subscription sales allow us to keep the program going, plain and simple. So thank you for supporting these teachers and students by supporting us. We all appreciate it.


KenKen News?

KenKen News

As KenKen sweeps across the globe, the reviews come pouring in! From the most prestigious newspapers to the most adept puzzle solvers, everyone agrees that KenKen is fantastic, both for fun and learning!

  • News_13
    Are you ready for the KenKen International Tournament?
    Sunday, December 17th, 2017
    Will Shortz’s Table Tennis Center

    175 Tompkins Ave,
    Pleasantville, NY 10570


    The KenKen International Championship is KenKen's official international championship held annually in New York. Each year, KenKen masters (and those who just want to challenge themselves) come together to compete and see who will claim the International KenKen Championship crown! Get ready...it's gonna be the biggest and best Championship yet!

  • Grey_sim_image
    Exciting News!
    The first ever national KenKen tournament is now underway in India!


    Students from all over India are competing to win a chance to go to New York to compete against other worldwide KenKen players. Originally planned for Japan but moved to New York, the competition will bring skilled players together to compete head-to-head against each other. Good luck!

  • Survey Says: KenKen is Turning Math Learning Upside Down
    June 29, 2012

    A game that students love and teachers are using to teach--is this logical?

  • Springhurst Elementary School Hosts KenKen Challenge
    June 14, 2012

    The KenKen spirit continues to spread; Springhurst Elementary School hosted its first KenKen Challenge this past week in Dobbs Ferry, NY.

  • The Zen of Ken - Yoga for the Mind
    May 25, 2012

    Experience the state of Zen-Ken, visit http://kenken.com and achieve good spirit, harmony and positive energy with the all NEW pre-selected daily puzzle selections. KenKen® Puzzle isn’t just a wildly popular and addictive hobby for millions of people worldwide. It’s learning-based and revolutionary. You could say that KenKen is turning logic skill on its head.

  • What has reached a landmark 100 million served? KENKEN! Whoops, 100 million one, 100 million two, 100 million three....
    May 11, 2012

    Even the number lovers at KenKen® Puzzle don’t usually enjoy counting to 100 million. But when that’s the number of puzzles played on their website, http://www.kenkenpuzzle.com, it’s a different story!

  • National Council of Teachers of Mathematics (NCTM)
    April 4, 2012

    National Council of Teachers of Mathematics (NCTM) Partners with Nextoy, llc. Daily Interactive KenKen Puzzles Now Appearing on Illuminations Website

    The NCTM, the world's largest organization dedicated to math education, and the popular math game and logic puzzle KenKen are partnering in the goal of making math learning fun.

  • Brain Games: Can KenKen Puzzles Make You Smarter?
    January 3, 2012

    Robert Fuhrer, 56, of Westchester County, New York is a long-time toy and game industry executive but he is probably best known as the unofficial godfather of the brain training puzzle called KenKen®.

    As president and founder of thirty-year-old Nextoy, LLC, Fuhrer often traveled abroad to spot new ideas and products ripe for export. During one of his frequent trips to Japan, he was intrigued by a popular puzzle called Kashikoku Naru (translated loosely as, the puzzle that makes you smarter) that was invented by a math teacher.

  • Scholastic DynaMath: Can you KenKen?
    January 6, 2011

    Congratulations—you’re about to get superpowers! It’s true: You’re about to be given the ability to solve KenKen puzzles!

    The puzzles look like sudoku, but in KenKen, math is part of the fun. Read on to build your puzzle powers. Soon you’ll be telling the world your new superhero saying: “I can KenKen!”

  • Scholastic Math: Can you KenKen?
    January 6, 2011

    So, you're already a Sudoku superstar? Think you haven’t found a grid game yet that can get the best of you? Well, it’s time to try a new puzzle to bend your brain and put your logic and math skills to the test!


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Welcome to KENKEN!

No matter what you're looking for — learning or fun — KenKen.com has it! Free online puzzles. Cool math games. Number games. (More addictive than Sudoku or Kakuro? You decide!) Educational games for kids. Visit our For Teachers section for math teacher resources, our free KenKen Classroom program, and a message from Tetsuya Miyamoto, the Japanese educator behind KenKen. Miyamoto, chess master David Levy, and the rest of Team KenKen have crafted these math puzzles into great games for learning and brain training. Need even more KenKen? Check out our Will Shortz Presents books. Try our mobile app on iPhone and iPad or our Kindle version. Play on the New York Times puzzle page and NCTM website. Regardless of why, how, or where you play, KenKen are the math puzzles that make you smarter!

Team KenKen