B.U.T. algorithm and whole mask makes interesting sudoku

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B.U.T. algorithm and whole mask makes interesting sudoku

Postby olimpia » Fri Mar 27, 2009 5:52 pm

I've been improving an algorithm which I call the B.U.T. technique (Bivalue Universal Transformation) to make sudoku puzzles. Then I added a mask, but it makes sudokus only when I allow clues to fill the WHOLE mask (never a partial subset of the mask).

One example is below. I call it the "B.U.T.-whole" sudoku because it was created with the B.U.T. algorithm and a whole mask:

The "BUT-Whole" Sudoku:
Code: Select all
. . . . . . . . .
. . 9 . 3 . 1 . .
. 4 . . 8 . . 2 .
. . . 1 . 7 . . .
. 8 . . 4 . . 6 .
. . . . 2 . . . .
. 2 . . 6 . . 8 .
. . 1 9 . 5 3 . .
. . . . . . . . .

Let me know if anyone likes it:!::D
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Postby Red Ed » Fri Mar 27, 2009 9:39 pm

Touting for business, are you? Tsk tsk.
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Postby wintder » Fri Mar 27, 2009 11:49 pm

And all will be revealed, by Ben Dover, on April 1st?:D
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Postby olimpia » Sun Apr 12, 2009 2:59 pm

Sorry for my bad humor. I'm just glad no one tried to ban me from these forums:!:

I'll be more serious from now on:D
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Postby Draco » Mon Apr 13, 2009 2:02 am

wintder wrote:And all will be revealed, by Ben Dover, on April 1st?:D

Not until at least one backdoor has been revealed, no doubt.
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Postby tarek » Mon Apr 13, 2009 1:37 pm

Draco wrote:
wintder wrote:And all will be revealed, by Ben Dover, on April 1st?:D

Not until at least one backdoor has been revealed, no doubt.

I thought it was Dawn Hobbs ???!!!

http://news.bbc.co.uk/1/hi/uk/7909561.stm
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