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 Post subject: What is this variant?
PostPosted: Fri Oct 13, 2017 2:52 am 
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Grand Master
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Anyone familiar with this variant? What do the Xs and the Vs represent? (I can't read any instructions.)

http://en.oubk.com/sudoku/VXSudoku-3x3- ... &is_next=1


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PostPosted: Fri Oct 13, 2017 5:16 am 
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Grand Master
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Well, I found the answer to my own question. From anypuzzle.com:

Quote:
Sudoku XV combines classic Sudoku with 'v' and 'x' Roman numeral markers which indicate that touching pairs of squares sum to either 5 or 10 respectively.

All possible pairs which sum to either 5 or 10 are marked, so if there is no 'v' and no 'x' then two squares do not sum to either 5 or 10.


Meh. Not a fan of puzzles that require more math than simple comparisons. Not that I hate math (my degree is in math), but I do sudoku to relax (usually before bed), and incorporating math into my sudoku is not relaxing to me.


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PostPosted: Sun Mar 10, 2019 12:02 am 
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Grand Master
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Not trying to distract solvers from this forum, since there are plenty of different types of puzzles to try here.

I tried the link to the VX Puzzles today. That site has 5 different levels, ranging from (Exremely) Easy to Expert; the link goes to whatever is the most recent Expert level puzzle.

This is the one that I reached today. It's about the level of an average MeanDoku NC, so anyone who has done those shouldn't find it too difficult; remembering that any pairs of cells not marked as V or X is like applying NC in a MeanDoku NC. I needed to use some short forcing chains to make a few later eliminations and placements but they were easy ones which I could do in my head, so I didn't write a walkthrough.

How about it enxio27; it only needs mental arithmetic deciding whether pairs of cells total 5, 10 or don't.

Solution:
1 7 9 8 3 2 4 5 6
5 2 4 9 1 6 3 8 7
3 6 8 4 7 5 1 2 9
2 3 6 5 4 9 7 1 8
8 9 1 3 2 7 5 6 4
4 5 7 6 8 1 2 9 3
9 8 2 7 5 3 6 4 1
6 1 3 2 9 4 8 7 5
7 4 5 1 6 8 9 3 2


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PostPosted: Thu Mar 14, 2019 5:03 pm 
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This is an XV puzzle sudoku

Cells sharing an X edge add to 10
Cells sharing a V edge add to 5
Cells with no X and no V edge between them CAN'T add to either 5 or 10

I tried to play with that concept when I posted a NO VX puzzle on the Players forum (which was a VX puzzle but without any V or X edges :idea: )

tarek


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