A record named "maximum" of Sudoku list

Everything about Sudoku that doesn't fit in one of the other sections

Postby Mike Barker » Sun Mar 16, 2008 1:14 pm

The one I remember has a similar result, but was a different puzzle. Even so, I really liked these fish so thought it worth posting just for the fish. Also, as you pointed out, it also provides a possible explaination for the high Nishio count.
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Postby JPF » Sun Mar 16, 2008 4:29 pm

ronk wrote:Is a high Nishio chain count meaningful?
Don't know.
Probably interesting for some solvers people.
Mike Barker wrote: Even so, I really liked these fish so thought it worth posting just for the fish.

In any case, that's the purpose of this thread and a nice challenge for puzzles designers.

ronk wrote:Note: These same fish, likely for the same puzzle, have been posted somewhere in this forum before.

I'd love to see this puzzle:!:

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Postby ronk » Sun Mar 16, 2008 5:48 pm

JPF wrote:
ronk wrote:Note: These same fish, likely for the same puzzle, have been posted somewhere in this forum before.

I'd love to see this puzzle:!:

Judging by the filename on my computer, the puzzle I've worked with before is ...
Code: Select all
 . . . | . 1 . | . . .
 . . 1 | 2 . 3 | 4 . .
 . 2 5 | 6 . 7 | 1 3 .
-------+-------+-------
 . 1 8 | . . . | 2 4 .
 2 . . | . . . | . . 6
 . 6 7 | . . . | 8 1 .
-------+-------+-------
 . 4 6 | 5 . 2 | 7 8 .
 . . 2 | 1 . 8 | 6 . .
 . . . | . 7 . | . . .

... and it was posted by Mauricio on 9/3/2007, but I can't find it today. **

Although the empty cells and eliminations are a bit different, it does have the same unfinned jellyfish r3467\c159b5 and c3467\r159b5.

** Mauricio posted five puzzles with this pattern on the Programmers' Forums here.
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Postby Eioru » Wed Oct 01, 2008 12:04 am

The puzzle just only have one digit of 1,2,3.

Code: Select all
4.5.67.89
67..894.5
89.4.567.
568.94..7
7.45..896
9..67854.
15794..68
3498.675.
28675.9.4            ED=7.7/7.7/2.6

24 x Hidden Single
4 x Pointing
1 x Claiming
1 x X-Wing
8 x XY-Wing
2 x Turbot Fish
1 x Nishio Forcing Chains

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Postby daj95376 » Wed Oct 01, 2008 8:57 am

Eioru wrote:The puzzle just only have one digit of 1,2,3.

Code: Select all
finned Franken Swordfish c678\r49b3   [r4c4]<>1
finned Franken Swordfish c678\r47b3   [r4c4]<>2
Singles
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7.7 -- 57 clues

Postby Pat » Thu Oct 02, 2008 5:00 am

Eioru wrote:
        [ 57 clues ]

        ED=7.7/7.7/2.6
Code: Select all
4.5.67.8967..894.589.4.567.568.94..77.45..8969..67854.15794..683498.675.28675.9.4


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



hey Eioru,

i assume you meant this for the other Topic?
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Postby 999_Springs » Thu Apr 16, 2009 3:47 pm

I was messing around in the patterns game and I got this...
999_Springs wrote:
Code: Select all
. . . . 4 . . . .
. . 1 3 . 5 6 . .
. 7 . . . . . 2 .
4 . . . . . . . 3
. 8 . . . . . 9 .
. . 5 6 . 7 4 . .
. 2 . . 1 . . 7 .
3 . . . 6 . . . 8
. . . . . . . . .  ED=7.4/7.2/7.1

SE wrote:Analysis results
Difficulty rating: 7.4
This Sudoku can be solved using the following logical methods:
56 x Hidden Single
3 x Naked Single
7 x Pointing
1 x Claiming
1 x Naked Pair
2 x X-Wing
2 x Hidden Pair
3 x Bidirectional Y-Cycle
3 x Turbot Fish
7 x Bidirectional Cycle
44 x Forcing Chain

This beats the previous record by 13. I know that SE finds the "simplest" move at each step, but I am very suspicious that it deliberately takes a roundabout way to solve these puzzles. Like going from A to B using sat-nav.
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