July 31, 2018

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July 31, 2018

Postby ArkieTech » Tue Jul 31, 2018 10:37 am

Code: Select all
 *-----------*
 |9..|...|..7|
 |.1.|.2.|.6.|
 |..4|9.1|3..|
 |---+---+---|
 |..1|8.5|4..|
 |...|...|...|
 |..7|2.6|8..|
 |---+---+---|
 |..2|5.8|6..|
 |.6.|.3.|.5.|
 |4..|...|..1|
 *-----------*


Play/Print this puzzle online
dan
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Re: July 31, 2018

Postby SCLT » Tue Jul 31, 2018 12:16 pm

Code: Select all
+----------------+-----------------+---------------------+
|  9    2   35   |  6    8   c34   |  15    d14    7     |
|  8    1   35   |  34   2    7    |  59     6     459   |
|  6    7   4    |  9    5    1    |  3      8     2     |
+----------------+-----------------+---------------------+
|  3    9   1    |  8    7    5    |  4      2     6     |
|  2    8   6    |  13   4   b39   |  1579   179   59    |
|  5    4   7    |  2   a19   6    |  8      9-1   3     |
+----------------+-----------------+---------------------+
|  17   3   2    |  5    19   8    |  6      479   49    |
|  17   6   9    |  14   3    24   |  27     5     8     |
|  4    5   8    |  7    6    29   |  29     3     1     |
+----------------+-----------------+---------------------+


XY-Chain: (1=9)r6c5 - (9=3)r5c6 - (3=4)r1c6 - (4=1) r1c8 => -1 r6c8 ; stte
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Re: July 31, 2018

Postby SteveG48 » Tue Jul 31, 2018 1:56 pm

Code: Select all
 *-----------------------------------------------------------*
 | 9     2     35    | 6     8     3-4   |b15   a14    7     |
 | 8     1     35    |d34    2     7     | 59    6     59-4  |
 | 6     7     4     | 9     5     1     | 3     8     2     |
 *-------------------+-------------------+-------------------|
 | 3     9     1     | 8     7     5     | 4     2     6     |
 | 2     8     6     |d13    4     39    |c1579  179   59    |
 | 5     4     7     | 2     19    6     | 8     19    3     |
 *-------------------+-------------------+-------------------|
 | 17    3     2     | 5     19    8     | 6     479   49    |
 | 17    6     9     | 14    3     24    | 27    5     8     |
 | 4     5     8     | 7     6     29    | 29    3     1     |
 *-----------------------------------------------------------*


(4=1)r1c8 - 1r1c7 = r5c7 - (1=34)r25c4 => -4 r1c6,r2c9 ; stte
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Re: July 31, 2018

Postby Sudtyro2 » Tue Jul 31, 2018 3:25 pm

Code: Select all
+--------------+--------------+------------------+
| 9   2   35   | 6    8   34  | b15   c14   7    |
| 8   1   35   | 34   2   7   | a59    6   a59-4 |
| 6   7   4    | 9    5   1   |  3     8    2    |
+--------------+--------------+------------------+
| 3   9   1    | 8    7   5   |  4     2    6    |
| 2   8   6    | 13   4   39  |  1579  179  59   |
| 5   4   7    | 2   e19  6   |  8    d19   3    |
+--------------+--------------+------------------+
| 17  3   2    | 5   f19  8   |  6     479 f49   |
| 17  6   9    | 14   3   24  |  27    5    8    |
| 4   5   8    | 7    6   29  |  29    3    1    |
+--------------+--------------+------------------+

Almost hidden pair with spoiler 5r1c7.
HP(59)r2c79 = (5-1)r1c7 = r1c8 - r6c8 = r6c5 - (1=94)r7c59 => - 4r2c9; stte

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Re: July 31, 2018

Postby Cenoman » Tue Jul 31, 2018 9:04 pm

Code: Select all
 +-----------------+-----------------+---------------------+
 |  9    2    35   |  6    8   C34   | a15    D14    7     |
 |  8    1    35   |  34   2    7    |  59*    6     459*  |
 |  6    7    4    |  9    5    1    |  3      8     2     |
 +-----------------+-----------------+---------------------+
 |  3    9    1    |  8    7    5    |  4      2     6     |
 |  2    8    6    |  13   4   B39   | b1579* A179   59*   |
 |  5    4    7    |  2    19   6    |  8     z9-1   3     |
 +-----------------+-----------------+---------------------+
 |  17   3    2    |  5    19   8    |  6      479   49    |
 |  17   6    9    |  14   3    24   |  27     5     8     |
 |  4    5    8    |  7    6    29   |  29     3     1     |
 +-----------------+-----------------+---------------------+

UR(59)r25c79 using externals
(5-1)r1c7 = (1)r5c7
(9)r5c8 - (9=3)r5c6 - (3=4)r1c6 = (4=1)r1c8
(9)r6c8
=> -1 r6c8; ste
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Re: July 31, 2018

Postby Sudtyro2 » Wed Aug 01, 2018 4:57 pm

Code: Select all
+--------------+--------------+------------------+
| 9   2   35   | 6    8  b34  | a15@  b14   7    |
| 8   1   35   | 34   2   7   |  59    6    459  |
| 6   7   4    | 9    5   1   |  3     8    2    |
+--------------+--------------+------------------+
| 3   9   1    | 8    7   5   |  4     2    6    |
| 2   8   6    | 13   4  c39  |  1579# 179  59   |
| 5   4   7    | 2   c19* 6   |  8     9-1  3    |
+--------------+--------------+------------------+
| 17  3   2    | 5    19  8   |  6     479  49   |
| 17  6   9    | 14   3   24  |  27    5    8    |
| 4   5   8    | 7    6   29  |  29    3    1    |
+--------------+--------------+------------------+
Here's a late entry especially for SpAce...
In 1s, a finned sashimi kraken 1-Fish c7\r6 + fr5c7 rfr1c7 => - 1r6c8; stte
Base(c7); Cover(r6);
Potential elimination(*);
Eventual elimination(-);
Covered base cell(none);
Fin(#); Remote fin(@);
Code: Select all
1r1c7 - (1=43)r1c68 - (3=91)b5p68 - 1r6c8;
1r5c7                             - 1r6c8;
In checking the UFG definitions, I agree that Kraken does refer to having remote fin(s), as SpAce suggested. The remote fin chain can also involve non-fish digits.
Note above that the base and cover sectors don't necessarily have to intersect at a fish digit. As I understand it, that makes this fish sashimi as well.
The entire fish structure can also be viewed as a much simpler Kraken (1)c7 and uses the same two chains. One of the 1s must be true, and their two chains have a common outcome.

In the past, I could do larger fish. Size 1 is now my limit, and that's complicated enough. :)

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Re: July 31, 2018

Postby SpAce » Wed Aug 01, 2018 6:16 pm

Sudtyro2 wrote:Here's a late entry especially for SpAce...
In 1s, a finned sashimi kraken 1-Fish c7\r6 + fr5c7 rfr1c7 => - 1r6c8; stte

Thanks! :D It's awesome!

Note above that the base and cover sectors don't necessarily have to intersect at a fish digit. As I understanding it, that makes this fish sashimi as well.

An interesting observation! I'm just wondering... what do we really have if the cover doesn't touch any base candidates at all?

The entire fish structure can also be viewed as a much simpler Kraken (1)c7 and uses the same two chains. One of the 1s must be true, and their two chains have a common outcome.

But that would be boring :D

In the past, I could do larger fish. Size 1 is now my limit, and that's complicated enough. :)

Your 1-fishes are great, but I'm also yearning to see some mutants, preferably with endo-fins and cannibalism too! That may be difficult if you don't allow larger sizes?

PS. This reminds me of the International Obfuscated C Code Contest: https://www.ioccc.org . Should we have a similar contest for sudoku solving? :)
Code: Select all
   *             |    |               |    |    *
        *        |=()=|    /  _  \    |=()=|               *
            *    |    |   |-=( )=-|   |    |      *
     *                     \  ¯  /                   *   
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