long time no classical Mith sudoku

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long time no classical Mith sudoku

Postby urhegyi » Sat Nov 07, 2020 5:41 pm

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I'm missing the hardest Mith sudokus posted on this forum. Now we get Exoset problems, but I like the older examples like the Tatooines series too, because they are more human solvable at least for me. So I post one myself which I hope it gives the same solving pleasure for you all as it gave for me when solving them. Creating one with equal hardness is a difficult job to do so I modified one of the latest pattern game and I think I came close to the originals.
Code: Select all
..12..3...2...45..4...5...26...4...1..57..8...8...6...76..1...3....8..97..23..18.
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Re: long time no classical Mith sudoku

Postby SpAce » Sun Nov 08, 2020 2:10 am

Code: Select all
.---------------------.----------------------.-----------------.
| b589   b579    1    |  2     ab679   ab79  | 3    467   4689 |
| *389    2      3679 |  169    a3679    4   | 5    167   689  |
|  4      379    3679 |  1689    5       138 | 679  167   2    |
:---------------------+----------------------+-----------------:
|  6      379    379  |  589     4       38  | 279  2357  1    |
|  1239   1349   5    |  7       239     13  | 8    346   469  |
|  1239   8      3479 |  159     239     6   | 479  3457  459  |
:---------------------+----------------------+-----------------:
|  7      6      8    |  49      1       259 | 24   245   3    |
| c135   c1345  c34   | d46      8       25  | 246  9     7    |
| c59     459    2    |  3       7-6     57  | 1    8     456  |
'---------------------'----------------------'-----------------'

Death Blossom with transport:

    (3)r2c1 - (3=796)b2p325
    (8)r2c1 - (8=5796)r1c1265
    (9)r2c1 - (9=5134)b7p7456 - (4=6)r8c4

    => -6 r9c5; stte
-SpAce-: Show
Code: Select all
   *             |    |               |    |    *
        *        |=()=|    /  _  \    |=()=|               *
            *    |    |   |-=( )=-|   |    |      *
     *                     \  ¯  /                   *   

"If one is to understand the great mystery, one must study all its aspects, not just the dogmatic narrow view of the Jedi."
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Re: long time no classical Mith sudoku

Postby denis_berthier » Sun Nov 08, 2020 4:20 am

urhegyi wrote:I'm missing the hardest Mith sudokus posted on this forum.

I miss them too. Thanks for making more of them.

This puzzle can't be solved by Subsets alone; it requires bivalue-chains or something similar.

Code: Select all
***********************************************************************************************
***  SudoRules 20.1.s based on CSP-Rules 2.1.s, config = BC+SFin
***  Using CLIPS 6.32-r778
***********************************************************************************************
hidden-single-in-a-row ==> r7c3 = 8
174 candidates, 922 csp-links and 922 links. Density = 6.13%
whip[1]: r7n9{c6 .} ==> r9c6 ≠ 9, r9c5 ≠ 9
whip[1]: c5n2{r6 .} ==> r5c6 ≠ 2, r4c6 ≠ 2
whip[1]: r4n2{c8 .} ==> r5c8 ≠ 2, r6c7 ≠ 2, r6c8 ≠ 2
whip[1]: r3n8{c6 .} ==> r2c4 ≠ 8, r1c6 ≠ 8
finned-x-wing-in-rows: n6{r9 r1}{c5 c9} ==> r2c9 ≠ 6
finned-x-wing-in-rows: n4{r9 r5}{c2 c9} ==> r6c9 ≠ 4
hidden-triplets-in-a-column: c6{n1 n3 n8}{r3 r5 r4} ==> r5c6 ≠ 9, r4c6 ≠ 9, r4c6 ≠ 5, r3c6 ≠ 9, r3c6 ≠ 7
whip[1]: c6n5{r9 .} ==> r7c4 ≠ 5, r8c4 ≠ 5
swordfish-in-columns: n4{c3 c4 c7}{r6 r8 r7} ==> r8c2 ≠ 4, r7c8 ≠ 4, r6c8 ≠ 4
swordfish-in-columns: n6{c3 c4 c7}{r3 r2 r8} ==> r3c8 ≠ 6, r2c8 ≠ 6, r2c5 ≠ 6
naked-pairs-in-a-block: b3{r2c8 r3c8}{n1 n7} ==> r3c7 ≠ 7, r1c8 ≠ 7
whip[1]: c7n7{r6 .} ==> r4c8 ≠ 7, r6c8 ≠ 7
hidden-pairs-in-a-row: r6{n4 n7}{c3 c7} ==> r6c7 ≠ 9, r6c3 ≠ 9, r6c3 ≠ 3
hidden-pairs-in-a-column: c8{n4 n6}{r1 r5} ==> r5c8 ≠ 3
finned-x-wing-in-columns: n9{c7 c3}{r4 r3} ==> r3c2 ≠ 9
biv-chain[3]: r1c6{n9 n7} - b8n7{r9c6 r9c5} - c5n6{r9 r1} ==> r1c5 ≠ 9
naked-pairs-in-a-column: c5{r1 r9}{n6 n7} ==> r2c5 ≠ 7
whip[1]: b2n7{r1c6 .} ==> r1c2 ≠ 7
naked-triplets-in-a-row: r2{c1 c5 c9}{n8 n3 n9} ==> r2c4 ≠ 9, r2c3 ≠ 9, r2c3 ≠ 3
x-wing-in-columns: n9{c3 c7}{r3 r4} ==> r4c4 ≠ 9, r4c2 ≠ 9, r3c4 ≠ 9
naked-pairs-in-a-column: c2{r3 r4}{n3 n7} ==> r8c2 ≠ 3, r5c2 ≠ 3
finned-x-wing-in-rows: n3{r2 r5}{c1 c5} ==> r6c5 ≠ 3
biv-chain[3]: c1n8{r1 r2} - r2n3{c1 c5} - b2n9{r2c5 r1c6} ==> r1c1 ≠ 9
biv-chain[3]: r4c2{n3 n7} - r6c3{n7 n4} - r8c3{n4 n3} ==> r4c3 ≠ 3
biv-chain[3]: r1c2{n5 n9} - r1c6{n9 n7} - r9c6{n7 n5} ==> r9c2 ≠ 5
biv-chain[3]: r7c7{n2 n4} - b8n4{r7c4 r8c4} - r8n6{c4 c7} ==> r8c7 ≠ 2
hidden-single-in-a-row ==> r8c6 = 2
whip[1]: r8n5{c2 .} ==> r9c1 ≠ 5
singles ==> r9c1 = 9, r9c2 = 4, r8c3 = 3,> r6c3 = 4, r6c7 = 7
hidden-pairs-in-a-block: b6{r5c8 r5c9}{n4 n6} ==> r5c9 ≠ 9
finned-x-wing-in-rows: n9{r2 r6}{c9 c5} ==> r5c5 ≠ 9
stte
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Re: long time no classical Mith sudoku

Postby Cenoman » Sun Nov 08, 2020 9:26 am

Code: Select all
 +-----------------------+----------------------+----------------------+
 | b589   B579    1      |  2    Bc679  Bc79    |  3     467    4689   |
 | b389    2      3679   |  169   c3679   4     |  5     167    689    |
 |  4      379    3679   |  1689   5      138   |  679   167    2      |
 +-----------------------+----------------------+----------------------+
 |  6      379    379    |  589    4      38    |  279   2357   1      |
 |  1239   1349   5      |  7      239    13    |  8     346    469    |
 |  1239   8      3479   |  159    239    6     |  479   3457   459    |
 +-----------------------+----------------------+----------------------+
 |  7      6      8      |  49     1      259   |  24    245    3      |
 |za135  zA1345  z34     | z46     8     y25    |  246   9      7      |
 | b59     459    2      |  3      7-6    57    |  1     8      456    |
 +-----------------------+----------------------+----------------------+

Kraken row (5)r8c126
(5)r8c1 - (5=893)r129c1 - (3=796)b2p235
(5)r8c2 - (5=796)r1c256
(5)r8c6 - (5=1346)r8c1234
=> -6r9c5; ste
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Re: long time no classical Mith sudoku

Postby mith » Tue Nov 10, 2020 12:04 am

I still have a number to post, I'll get back to them soon (maybe even tomorrow). I've been messing around with variants a lot lately (see the two Consecutives in the variant section for something related to the Tatooine series), and just haven't gotten around to going through all my classic fishy puzzles to figure out what to post.
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