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Sashimi Swordfish.

 
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zoltag
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PostPosted: Mon Jan 15, 2007 4:54 pm    Post subject: Sashimi Swordfish. Reply with quote

At this point
Code:
.---------------.---------------.---------------.
| 6    49   5   | 1    2    7   | 3    49   8   |
| 8    24   7   | 46   3    9   | 1    5    246 |
| 12   3    149 | 5    8    46  | 269  7    269 |
:---------------+---------------+---------------:
| 3    2479 6   | 79   5    8   | 249  1    249 |
| 79   8    49  | 2    679  1   | 469  3    5   |
| 12   5    19  | 369  4    36  | 8    269  7   |
:---------------+---------------+---------------:
| 5    6    3   | 479  79   2   | 479  8    1   |
| 79   79   2   | 8    1    346 | 5    46   346 |
| 4    1    8   | 3679 679  5   | 2679 269  2369|
'---------------'---------------'---------------'


Sudoku Cue correctly identifies a swordfish (Sashimi, not really finned)
and will remove candidate 4 from r8c6 but misses removing the 4 from r2c4.

This is the original puzzle.
Code:

. . . | 1 . . | . . 8
. . 7 | . 3 9 | 1 . .
. 3 . | 5 . . | . 7 .
---------------------
3 . 6 | . 5 . | . 1 .
. 8 . | 2 . 1 | . 3 .
. 5 . | . 4 . | 8 . 7
---------------------
. 6 . | . . 2 | . 8 .
. . 2 | 8 1 . | 5 . .
4 . . | . . 5 | . . .


Edited to remove a topic best kept seperate.
http://www.sudocue.net/forum/viewtopic.php?t=500
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zoltag
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PostPosted: Wed Jan 24, 2007 11:53 pm    Post subject: Ping Reply with quote

Ruud, did you look at this?
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Ruud
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Joined: 30 Dec 2005
Posts: 601

PostPosted: Thu Jan 25, 2007 12:30 am    Post subject: Reply with quote

Zoltag,

When you place Color Wrap before the finned fish in the solver settings, SudoCue will perform 6 eliminations for digit 4 in a single move.

Finned fish only perform eliminations in a single box, although subsequent singles will do the remaining eliminations.

Ruud
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zoltag
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PostPosted: Thu Jan 25, 2007 11:08 am    Post subject: Reply with quote

Ruud wrote:
Zoltag,

When you place Color Wrap before the finned fish in the solver settings, SudoCue will perform 6 eliminations for digit 4 in a single move.

Thanks, I don't use colours. Sad

Ruud wrote:

Finned fish only perform eliminations in a single box, although subsequent singles will do the remaining eliminations.

Ruud


I drew attention to the fact that this is a sashimi because it acts like a skyscraper and does eliminate in more than one box.
How do you justify claiming that the cell r7c4 is the "fin" rather than r3c6?
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Ruud
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PostPosted: Thu Jan 25, 2007 6:38 pm    Post subject: Reply with quote

Both are valid fish. r357c367 is simply found before r357c347. This may change in the future, as I'm planning to optimize the code for this solving technique.

Ruud
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zoltag
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PostPosted: Thu Jan 25, 2007 7:04 pm    Post subject: Reply with quote

Thanks Ruud!
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zoltag
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PostPosted: Fri Jan 26, 2007 1:11 am    Post subject: Reply with quote

Ruud wrote:
Zoltag,

Finned fish only perform eliminations in a single box, although subsequent singles will do the remaining eliminations.

Ruud


I'm seeing that fins only eliminate in their own box.
A pattern can have fins and eliminate in many boxes.

http://www.setbb.com/phpbb/viewtopic.php?p=7370#7370
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