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0-2-5 (OhTwoFive) Puzzle

0-2-5-puzzle

0-2-5 (OhTwoFive) is yet another great puzzle by The Griddle. 0-2-5 puzzles contains elements of kakuro, sum Sudoku, and shape Sudoku.

Object of 0-2-5 is to fill the grid with the digits 0, 2 and 5 only to add up to thespecified row and column sums. In each shape in the grid, all squares must contain the same digit. Happy Puzzling!

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Str8ts Puzzle – Sudoku Variant

Str8ts-puzzle

Str8ts Puzzle is a Sudoku variant and is about identifying the next cells that can be deduced from the clues in the black and white cells.

The Rules are simple: 1. Rows and columns are divided into compartments of white squares. 2. Squares in compartments need to be filled in with single numbers. 3. These must complete a ‘straight’. A straight is a set of numbers with no gaps and in any order. 4. No single number can repeat in any row or column. 5. Clues in black cells remove that number as an option in that row and [Read More...]

 
 
 

MinuPlu – Sudoku Variant

Minuplu

Johannes from PuzLogical.com pointed me to a puzzle called MinuPlu which is the same like KenKen (another Sudoku variant).

The rules for Minuplu are almost as simple as Sudoku or KenKen. All cells of a MinuPlu have to be filled in with numbers. The possible numbers range from 1 to the size of the MinuPlu. For example, in a 4◊4 MinuPlu there are the numbers 1, 2, 3 and 4. Each number must appear exactly once in each row and each column.

However, in contrast to Sudoku, there are no blocks where this must be [Read More...]

 
 
 

Your sudoku will not be spoiled

Sudoku_15034

Oh noes! The puzzle craze of 2006 is ruined. Itís fiendish, it may even be diabolical, and itís the solution to Sudoku. To the outrage of the puzzle fans, an American computer scientist will tomorrow reveal a formula for solving any Sudoku problem, no matter how difficult.

The Crook algorithm is the first mathematical proof of how to solve the puzzle. Not even Howard Garns, the Indianapolis architect who devised Sudoku in 1979, could promise that.

For better or worse, reports of the the death of Sudoku through the works of James Crook are greatly exaggerated.

If youíre not familiar [Read More...]

 
 
 

Lego Mindstorm Sudoku Solver

Lego-sudoku-killer

How to kill a hobby and create another one, just put LEGO Mindstorms NXT and Sudoku together.

This Lego robot solves 200 Sudoku’s puzzles in 30 minutes with just Lego, a webcam and some code. That’s just 9 seconds per Sudoku puzzle. Although the iPhone application Sudoku Grab seems to be much more efficient, this Lego Robot is just another great invention. You can watch a video of the Lego Sudoku Killer solving Sudoku puzzles at YouTube. Happy Puzzling!

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Mathematician says his Sudoku secret is foolproof

Sudoku_15033

Math has helped place a man on the moon and has counted the genes in our DNA.

But never mind all that. A mathematician says he has finally produced something that people really care about: a foolproof way to beat Sudoku puzzles.

“Sudoku has become the passion of many people the world over,” says computer scientist J. F. Crook of Winthrop University in Rock Hill, S.C., in the current Notices of the American Mathematical Society. “The interesting fact about Sudoku is that it is a trivial puzzle to solve.”

Not everyone would agree. Since the introduction of the numerical puzzle [Read More...]

 
 
 

Sudoku Grab for iPhone

Sudoku-grab-for-iphone

Sudoku Grab is a brilliant application for Sudoku lovers with an iPhone.

With Grab Sudoku you can take a photo from any Sudoku puzzle (e.g. news paper, Sudoku puzzle book etc.). Grab Sudoku will automatically make a copy of the Sudoku grid that fits perfectly on your iPhone screen and also recognize all the numbers. Now you’ll have the option to solve the Sudoku yourself on your iPhone or let you can let your iPhone solve the Sudoku in a split second for you.

This is the perfect application to store Sudoku’s on [Read More...]

 
 
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