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8x8 no-op with negative numbers
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Posted on: Sun Apr 26, 2015 12:20 pm

Posts: 2281
Joined: Thu May 12, 2011 11:58 pm
8x8 no-op with negative numbers
Accidentally created this one:

Posted on: Sun Apr 26, 2015 6:56 pm

Posts: 116
Joined: Sat May 14, 2011 3:18 am
Re: 8x8 no-op with negative numbers
-4 to 4, I presume?

Posted on: Sun Apr 26, 2015 7:46 pm

Posts: 2281
Joined: Thu May 12, 2011 11:58 pm
Re: 8x8 no-op with negative numbers
pharosian wrote:
-4 to 4, I presume?

-4 to 4, now let me think...

Posted on: Wed Apr 29, 2015 3:26 am

Posts: 116
Joined: Sat May 14, 2011 3:18 am
Re: 8x8 no-op with negative numbers
I sense sarcasm there.

But really, now that I think a bit more on it, a -4 to 4 puzzle would by 9x9, so what IS the range for this one? Or is figuring that out part of the puzzle?

Posted on: Wed Apr 29, 2015 8:43 am

Posts: 2281
Joined: Thu May 12, 2011 11:58 pm
Re: 8x8 no-op with negative numbers
pharosian wrote:
But really, now that I think a bit more on it, a -4 to 4 puzzle would by 9x9, so what IS the range for this one? Or is figuring that out part of the puzzle?

I'm actually not 100% sure you can figure out the range from the puzzle,
but my guess is it should be possible.

Edit: looking at the puzzle, it's quite easy, there's a "-9" and a given "4".

The 4 tells you the smallest possible negative number is -3, etc.

Last edited by pnm on Wed Apr 29, 2015 8:46 am, edited 1 time in total.

Posted on: Wed Apr 29, 2015 11:48 am

Posts: 66
Joined: Fri May 13, 2011 9:37 am
Re: 8x8 no-op with negative numbers
I found a solution. Not sure if it is the only one.

Posted on: Wed Apr 29, 2015 7:22 pm

Posts: 541
Joined: Fri May 13, 2011 1:37 am
Re: 8x8 no-op with negative numbers
Still not sure about the range of numbers used........is it obvious.........like -3 to +4?

Posted on: Thu Apr 30, 2015 10:43 am

Posts: 66
Joined: Fri May 13, 2011 9:37 am
Re: 8x8 no-op with negative numbers
Yes, Beaker, that is the range I found too.

Posted on: Thu Apr 30, 2015 11:35 pm

Posts: 711
Joined: Fri May 13, 2011 6:51 pm
Re: 8x8 no-op with negative numbers
nicow wrote:
Yes, Beaker, that is the range I found too.

The solution I found is unique with respect to numbers I have considered but not unique with respect to operators, as usual in no-ops, in fact the cage "0" c1-c2-d1 admits up to 3 different operators (+, x, :). However I did not try "many" different sets of numbers, continuous of course, since I believe that actually the software is not able to generate puzzles with skipped numbers .

Posted on: Fri May 01, 2015 8:43 am

Posts: 2281
Joined: Thu May 12, 2011 11:58 pm
Re: 8x8 no-op with negative numbers
clm wrote:
However I did not try "many" different sets of numbers, continuous of course, since I believe that actually the software is not able to generate puzzles with skipped numbers .

That is correct.

It is the next step for the software, puzzle with arbitrary sets of numbers

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