Windoku and XY-chain

For fans of Killer Sudoku, Samurai Sudoku and other variants

Re: Windoku and XY-chain

Postby m_b_metcalf » Fri May 22, 2020 1:10 pm

I stoked up my old code to look into this, and produced a couple of X-windoku puzzles by the way:
Code: Select all
 . 7 . . . . . 6 .
 . . 8 . 9 . . . .
 . . . . . 3 . . .
 . . 5 . . . . . 4
 . . . . 7 . . . .
 1 . . . . . . . .
 4 2 . . 3 . . . 6
 . . . 9 . . . . .
 9 . . . . . . . . 15 clues, fairly easy

 7 . 8 . 2 9 . . .
 . . . 5 . . . . .
 . . . . . . 6 . .
 . . . . 9 . . . .
 . 2 . . . . 8 . .
 . . . . . . 3 . .
 . 5 . . . 2 . . .
 . . . . . . . . 3
 8 . . . . . 4 . . 15 clues, rather hard



Mike
Last edited by m_b_metcalf on Fri May 22, 2020 5:42 pm, edited 2 times in total.
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Re: Windoku and XY-chain

Postby tarek » Fri May 22, 2020 1:47 pm

Sukaku explainer could verify and rate them for you. It had several of the popular variants supported. The generalised forms of techniques (intersection and naked sets) need to be selected which I’m hoping happens by default when you choose a variant mode
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Re: Windoku and XY-chain

Postby m_b_metcalf » Fri May 22, 2020 2:29 pm

tarek wrote:Sukaku explainer could verify and rate them for you. It had several of the popular variants supported. The generalised forms of techniques (intersection and naked sets) need to be selected which I’m hoping happens by default when you choose a variant mode

Tarek, Thanks. I didn't realise that the variants could be combined. Its ratings confirm what I'd written.

Mike
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Re: Windoku and XY-chain

Postby tarek » Fri May 22, 2020 2:57 pm

On the GUI you can combine all available variants except that you can't choose more than 1 out of (Asterisk, Girandola, Center dot). This is to avoid "Colour salad"

tarek
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Re: Windoku and XY-chain

Postby m_b_metcalf » Sat May 23, 2020 8:55 am

And, to round this off, a 13-clue X-windoku rated at SE 9.0:
Code: Select all
 . . . . . . . . .
 . . . 9 . . . . .
 4 2 . . . . . . 6
 1 . . . . . . . .
 . . . . 7 . . . .
 . . 5 . . . . . 4
 . . . . . 3 . . .
 . . 8 . 9 . . . .
 . 7 . . . . . 6 .   X-windoku, rather hard
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Re: Windoku and XY-chain

Postby m_b_metcalf » Sun May 24, 2020 9:43 am

Code: Select all
 . . . . . . . . .
 . . . . . . . . .
 . . . 3 4 . . . .
 . . . 7 . . . . 6
 . . 1 . 3 . 5 . .
 2 . 3 . . . . 1 .
 . . . 9 . . . . .
 . . . 8 . 4 . . .
 . . . . . . . . .  X-windoku, 13 clues, ED=10.0/1.5/1.5
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