KenKen
KenKen™ is a mathematical and logical puzzle loosely similar to sudoku. It was invented by a Japanese mathematics teacher Tetsuya Miyamoto as an 'instruction-free' method of training the brain and was later published in The Times in March 2008.
The objective is to fill a grid in with the digits 1 through 6 such that:
- Each row contains exactly one of each digit
- Each column contains exactly one of each digit
- Each bold-outlined group of cells contains digits which achieve the specified result using the specified mathematical operation: addition (+), subtraction (-), multiplication (x), and division (รท). Unlike Killer sudoku, digits may repeat within a group.
If you want to have a go you can find online puzzles at Kenken.com
Kenken Books
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The "Times": KenKen: The New Brain-training Puzzle Phenomenon
Puzzle books by KenKen creator Tetsuya Miyamoto. Four books of puzzles available. From Amazon.co.uk |
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Will Shortz Presents the Little Gift Book of Kenken
250 logic puzzles that make you smarter from the godfather of Sudoku. From Amazon.co.uk and Amazon.com |
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Will Shortz Presents Kenken
100 logic puzzles that make you smarter. From Amazon.co.uk and Amazon.com |
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The "Times": Junior KenKen:
Brain training for young minds by KenKen creator Tetsuya Miyamoto. From Amazon.co.uk |
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Will Shortz Presents I Can KenKen!
KenKen helps children improve concentration, logic and arithmetic skills. Amazon.co.uk and Amazon.com |
Sudoku Gift Ideas
for Christmas 2021
Sudoku Quotes and TipsThe great thing about these puzzles is that they have to be solved by pure logic, not luck. They can be frustrating, but the reward when you crack them is a great feeling.
Wayne Gould, Father of the current Sudoku craze.