djApe Sample Non-Consecutive

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djApe Sample Non-Consecutive

Finished this puzzle last night. I believe this is the first fully non-consecutive puzzle I have completed, although I have completed partially non-consecutive puzzles (with dividing lines) before. Once I grasped the concept of a fully non-consecutive, it was pretty easy, but an enjoyable puzzle and a nice change of pace, nonetheless.

enxio27

Posts: 484
Joined: 13 November 2007

Re: djApe Sample Non-Consecutive

This puzzle has multiple solutions (possibly 000's) . Andrew Stuart's solver stopped at 500.

Leren
Leren

Posts: 3857
Joined: 03 June 2012

Re: djApe Sample Non-Consecutive

Leren wrote:This puzzle has multiple solutions (possibly 000's) . Andrew Stuart's solver stopped at 500

No, it doesn't. It's a non-consecutive, meaning that it's a standard puzzle with the added constraint that no adjacent (horizontal/vertical) digits may be consecutive.

enxio27

Posts: 484
Joined: 13 November 2007

Re: djApe Sample Non-Consecutive

With the non-consecutive constraint added the solution becomes trivial, with just singles and the non-consecutive constraint rule being required. The solution is :

Code: Select all
*-----------------------------------*
| 5  7  1   | 3  6  2   | 9  4  8   |
| 2  4  8   | 5  9  7   | 1  6  3   |
| 6  9  3   | 8  4  1   | 7  2  5   |
|-----------+-----------+-----------|
| 1  6  9   | 4  2  8   | 3  5  7   |
| 8  2  4   | 7  5  3   | 6  1  9   |
| 3  5  7   | 9  1  6   | 4  8  2   |
|-----------+-----------+-----------|
| 9  1  5   | 2  7  4   | 8  3  6   |
| 4  8  2   | 6  3  9   | 5  7  1   |
| 7  3  6   | 1  8  5   | 2  9  4   |
*-----------------------------------*

Leren
Leren

Posts: 3857
Joined: 03 June 2012

Re: djApe Sample Non-Consecutive

Leren wrote:With the non-consecutive constraint added the solution becomes trivial, with just singles and the non-consecutive constraint rule being required.

As I said, it's a pretty easy puzzle, but minding the non-consecutives gave it some additional interest.

enxio27

Posts: 484
Joined: 13 November 2007

Re: djApe Sample Non-Consecutive

Are the givens required to be non-consecutive, too? That is, if somebody came up with a "non-consecutive" where the givens violated non-consecutivity, would everybody scream and shout and boo and hiss?

(Leave it to me to ask a question like this.)

Bill Smythe
Smythe Dakota

Posts: 563
Joined: 11 February 2006

Re: djApe Sample Non-Consecutive

Smythe Dakota wrote:Are the givens required to be non-consecutive, too? That is, if somebody came up with a "non-consecutive" where the givens violated non-consecutivity, would everybody scream and shout and boo and hiss?

It depends on whether the puzzle is supposed to be fully non-consecutive or only partially non-consecutive. A puzzle can't legitimately be called fully non-consecutive if some of the givens are consecutive. However, a partially non-consecutive puzzle has cell borders that are marked as non-consecutive, while all other adjoining cells, including givens, can be consecutive.

enxio27

Posts: 484
Joined: 13 November 2007

Re: djApe Sample Non-Consecutive

Aw, darn. So you expect the puzzle maker to follow the same rules as the puzzle solver.

Bill Smythe
Smythe Dakota

Posts: 563
Joined: 11 February 2006

Re: djApe Sample Non-Consecutive

Smythe Dakota wrote:Aw, darn. So you expect the puzzle maker to follow the same rules as the puzzle solver.

LOL! Of course! Same reason that a puzzle with multiple solutions is invalid.

enxio27

Posts: 484
Joined: 13 November 2007

Re: djApe Sample Non-Consecutive

Sure, but a puzzle where the givens are allowed to be consecutive, but not the fill-ins, could still be a valid puzzle, in that (for example) there should be only one solution.

It wouldn't affect the validity of the puzzle (as long as the rules are known to all), but as I said before it might make some people boo and hiss.

I suppose such a puzzle should also specify whether a given and an adjacent non-given are allowed to be consecutive.

Bill Smythe
Smythe Dakota

Posts: 563
Joined: 11 February 2006

Re: djApe Sample Non-Consecutive

Bill

Can I clarify, do you mean:

1 The givens can be consecutive with each other but all other cells must be non-consecutive with each other and the givens: this is just a C-NC puzzle and valid if you put thick black lines between your consecutive givens; or

2 The givens can be consecutive with each other and any adjacent cell but all other cells must be non-consecutive: this would be different. I'll play around with it and see if anything usable comes out (I can't see a good way of using JSudoku to assist).

Maurice

enxio

I forgot I'd promised you a medium level NC. I try and do one and post it here.
The hard one (JS uses 7 small fishes and 5 medium NC moves) I posted on the assassin site was (note it is X and Non-Consecutive):

Vanilla X NC1

JS Code:
.....4..........9..4.......4...1..........7.11...6.....5..............6......2...
Need to add NC and it is X

Solution:
863924175
517386492
249751638
492517386
638249751
175863924
751638249
924175863
386492517
HATMAN

Posts: 264
Joined: 25 February 2006
Location: Nigeria

Re: djApe Sample Non-Consecutive

HATMAN wrote:I forgot I'd promised you a medium level NC. I try and do one and post it here.
The hard one (JS uses 7 small fishes and 5 medium NC moves) I posted on the assassin site was (note it is X and Non-Consecutive)

Thank you so much, Maurice! This will hopefully be a good diversion when I need a study break this week.

enxio27

Posts: 484
Joined: 13 November 2007

Re: djApe Sample Non-Consecutive

Enxio: here is a puzzle (one solution) with four levels of increasing difficulty.

Vanilla X NC 5 E

Vanilla X NC 5 B

Vanilla X NC 5 A

Vanilla X NC 5

Solution:
935714862
682539417
417286935
174628359
826953174
359471628
593147286
268395741
741862593
HATMAN

Posts: 264
Joined: 25 February 2006
Location: Nigeria