The New Sudoku Players' Forum

by **Mathimagics** » Mon Dec 28, 2015 10:13 pm

These puzzles are a variation of standard Kakuro, with digit values in the range 0 to 9. This simple change offers a higher potential level of complexity.

For example, a run length of 4 with sum 10 is no longer unique, since we can have any of:

0 1 2 7
0 1 3 6
0 1 4 5
0 2 3 5
1 2 3 4

Here is a simple example to begin with:

by **Mathimagics** » Mon Dec 28, 2015 10:15 pm

And here is a slightly harder example:

by **Mathimagics** » Mon Dec 28, 2015 10:19 pm

Here are the solutions to the examples above:
Example1:

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Example2:

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by **Mathimagics** » Tue Dec 29, 2015 1:31 pm

Here is one for the more adventurous:

: KZ_Example3E.jpg (70.78 KiB) Viewed 1831 times

Solution:

Hidden Text: Show

by **Smythe Dakota** » Thu Dec 31, 2015 4:29 pm

How about Hexadecimal Zeroes-Allowed Kakuro? Allowable values would be 0-9 and A-F.

In keeping with the spirit, sums (clues) should be given in hexadecimal, as well.

Bill Smythe

by **Mathimagics** » Sat Jan 02, 2016 11:01 am

Smythe Dakota wrote:How about Hexadecimal Zeroes-Allowed Kakuro?

Why not indeed? As you may know, I have been experimenting with various grid sizes in order to determine the maximum number of blank cells NB for which unique solutions exist.

I had intended to generalise this to explore the effect of various domain sizes, D. Standard Kakuro has D = 9, KakuroZero is really standard Kakuro with D = 10, KakuroHex would be D = 16.

The expected effect is a reduction in max NB for increasing D, and vice-versa.

My original software was developed in my usual slap-dash manner, and it assumed D = 9. This made KZ a little tricky to arrive at, but now I have sorted that out, I should be able to to produce puzzles for arbitrary D without too much trouble.

by **Mathimagics** » Sat Jan 02, 2016 4:16 pm

Ok, it seems be working.

I have attached two samples, one with clues are shown in decimal, and a different puzzle with clues in hex.

I am not convinced hex-clues is really a good idea, on reflection.

First you have to convert them, which is not an issue, but you then have to either mark the decimal values into the grid, thus making a potential mess, or else keep a list separately, and thus lose the direct visual clue/sum correspondence.

Anyway, you be the judge!

I do provide the solutions in hex format, since this allows a single-character for each position, and will do this for D <= 36 (heaven forbid I ever venture that far!).

: Clues in normal (decimal) format; KP080816_Test168D.jpg (43.7 KiB) Viewed 1802 times

Solution (Test168D):

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: Clues in HEX format; KP080816_Test128H.jpg (43.23 KiB) Viewed 1802 times

Solution (Test128H):

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by **Pat** » Sun Jan 03, 2016 10:06 am

Mathimagics wrote:

---KakuroZero is really standard Kakuro with D = 10

or D=10 could be 1-9 + A

by **Mathimagics** » Sun Jan 03, 2016 1:56 pm

Yes, it could be that way.

But I have decided to adopt the convention that for D <= 9, the value range will be {1, 2, ... D}, and for D > 9 the range will be {0, 1, ... D-1}.

by **Mathimagics** » Sun Jan 03, 2016 2:06 pm

Here are two KauroHex samples on a larger grid. Cell values are 0 to 15.

The second example is harder than the first.

: KP111116_Test001.jpg (71.63 KiB) Viewed 1794 times

Solution (KP111116_Test001)

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: KP111116_Test064R.jpg (71.97 KiB) Viewed 1794 times

Solution (KP111116_Test064R)

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