Almost Locked Cells(+3) is possible?

mishichan · Last edited by mishichan on Sat Dec 16, 2006 1:26 pm; edited 1 time in total

Hi, everyone

I have not read all the post on the forums, so the below may be already discussed. If so, I am sorry to bother you.

Now, I am trying to categorize Sudoku Tecniques, and found a little different explanation for X-cycle or sashimi fish just like ALS.

The above is simple X-cycle or 2 strong link combination or ...

As indicated on the drawing, we can treat them as 2 Almost Locked Cells and 1 restricted common. So, we can eliminate X from sky-blue cell.

Same as X-cycle, we can treat Sashimi arrangement.

Also we can treat 3 Almost Locked Cells(+2) and two restricted common arrangement as below:

Now my question. Is it possible to make 4 Almost Locked Cells(+3) and 3 restricted commons on 9x9 Sudoku? (except x-cycle type)

Regards,
mishichan

rkral

mishichan, the http://geocities.yahoo.co.jp/ is active, but the graphics aren't showing up here.

You might edit your post and change the illustrations to text ... inside BBCode "Code tags".

[code]

illustration using text

[/code]

mishichan

Thank you rkral!

Yahoo Japan don't like direct link, may be.

I'll try something else.

Jean-Christophe · Posted: Sat Dec 16, 2006 12:45 pm Post subject:

mishichan, concerning the images, it seems yahoo jp returns a "forbidden access", probably because the refferer (this setbb.com forum) isn't allowed by yahoo jp.

There a several free image hosting services available that works fine. Here are two :
http://imageshack.us/
http://tinypic.com/

Now, I could view your images by opening them in a separate window.

The first two ones are indeed Turbot fishes. The first one is a 2-String Kite. The second is a Skyscraper

The third one is a sashimi swordfish

What you're looking for is a sashimi jellyfish.
_________________
Jean-Christophe
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes.

mishichan · Posted: Sat Dec 16, 2006 1:26 pm Post subject:

Thank you, Jean-Christophe

I'll try your recommendation.

And yes, third one is sashimi swordfish!

Now checking sashimi jerry fish, it's too complicated.....

Jean-Christophe · Posted: Sat Dec 16, 2006 2:48 pm Post subject:

I don't have implemented ALS in my soft, but maybe one can detect these finned/sashimi fishes using ALS on the candidate list transfomed from the rows &columns indexes like for regular X-wing,swordfish...

It could work for Skyscraper (sashimi X-wing), sashimi swordfish, jelly... where only rows (or columns) are considered. But I don't thing it would work for patterns like 2-String Kite where both rows and columns (and/or boxes) are considered.
_________________
Jean-Christophe
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes.

daj95376 · Posted: Sat Dec 16, 2006 7:10 pm Post subject:

I don't have fish in my solver as a technique; however, I have basic Templates and it catches fish.

I'm currently searching a set of puzzles (that I generated) in hopes of finding Kraken fish for ronk. Along with Kraken fish, I've turned up finned and Sashimi fish.

mishichan · Posted: Sun Dec 17, 2006 12:08 pm Post subject: