Rock Pool

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Rock Pool

Postby shye » Thu Oct 06, 2022 9:21 am

Code: Select all
+-------+-------+-------+
| 1 2 3 | 4 . . | 9 6 . |
| 4 . 9 | . . 1 | . . 2 |
| 7 8 . | . 2 . | . . . |
+-------+-------+-------+
| 2 . . | 3 . . | 7 1 . |
| . . 8 | . . 7 | . . 9 |
| . 7 . | . 4 . | . . . |
+-------+-------+-------+
| 8 . . | 7 . . | 6 2 . |
| 6 . . | 8 . . | 4 9 . |
| . 3 . | . 6 . | . . . |
+-------+-------+-------+
1234..96.4.9..1..278..2....2..3..71...8..7..9.7..4....8..7..62.6..8..49..3..6....

estimated rating: 6.6
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Re: Rock Pool

Postby yzfwsf » Thu Oct 06, 2022 10:44 am

Franken Squirmbag: 5r1478b1\c23569 => r69c369,r3c69,r5c25,r2c5<>5
stte
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Re: Rock Pool

Postby jco » Thu Oct 06, 2022 9:44 pm

I needed three moves for this nice puzzle.

After basics
Code: Select all
.--------------------------------------------------------------------.
| 1      2      3      | 4     b578   c58     | 9      6      578    |
| 4      56     9      |c56    b378    1      | 38     378    2      |
| 7      8      56     |c569    2      3569   | 135    345    145    |
|----------------------+----------------------+----------------------|
| 2      4569   456    | 3     b589    5689   | 7      1      4568   |
| 35     1456   8      | 1256   15     7      | 235    345    9      |
| 359    7      156    | 12569  4      25689  | 2358   358    568    |
|----------------------+----------------------+----------------------|
| 8      1459   145    | 7     a1359   359    | 6      2      135    |
| 6      15     27     | 8      135    235    | 4      9      1357   |
| 59     3      27     | 125-9  6      4      | 158    578    1578   |
'--------------------------------------------------------------------'

1. (9)r7c5 = (978)r124c5 - (8=569)b3p347 => -9 r9c4 [3 placements and NP]
----
Code: Select all
.--------------------------------------------------------------------.
| 1      2      3      | 4     a7-58 Ai58     | 9      6      57-8   |
| 4     g56     9      |h56   Cb37-8   1      |D38     378    2      |
| 7      8     f56     | 569    2     B3569   | 135    345    145    |
|----------------------+----------------------+----------------------|
| 2      9      46     | 3      58     568    | 7      1      4568   |
| 35     146    8      | 1256   15     7      | 235    345    9      |
| 35     7      16     | 12569  4      25689  | 2358   358    568    |
|----------------------+----------------------+----------------------|
| 8      145   e145    | 7      9    Ad35     | 6      2      135    |
| 6      15     27     | 8     c135    235    | 4      9      1357   |
| 9      3      27     | 125    6      4      | 158    578    1578   |
'--------------------------------------------------------------------'

2. (7)r1c5 = (7-3)r2c5 = (3)r8c5 - (3=5)r7c6 - (5)r7c3 = (5)r3c3 - (5)r2c2 = (5@)r2c4 - (5=8)r1c6 => -5@ r1c5, -8 r1c5
3. (8=53)r17c6 - (3)r3c6 = (3)r2c5 - (3=8)r2c7 => -8 r1c9, -8 r2c5; ste
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Re: Rock Pool

Postby Cenoman » Fri Oct 07, 2022 4:10 pm

Also three steps:
Code: Select all
 +---------------------+-------------------------+----------------------+
 |  1     2      3     |  4       578    8-5     |  9      6     578    |
 |  4     56     9     | b56      378    1       |  38     378   2      |
 |  7     8      56    | b569     2     b3569    |  135    345   145    |
 +---------------------+-------------------------+----------------------+
 |  2     4569*  456   |  3       589*   568-9   |  7      1     4568   |
 |  35    1456   8     |  1256    15     7       |  235    345   9      |
 |  359   7      156   |  12569   4      25689   |  2358   358   568    |
 +---------------------+-------------------------+----------------------+
 |  8     1459*  145   |  7       1359* a35-9    |  6      2     135    |
 |  6     15     27    |  8       135    235     |  4      9     1357   |
 |  59    3      27    |  1259    6      4       |  158    578   1578   |
 +---------------------+-------------------------+----------------------+

1. XW(9) c25\r47 => -9 r47c6
2. ALS-XZ: (5=3)r7c6 - (3=695)b2p479 => -5 r1c6; lcls, 5 placements

Code: Select all
 +-------------------+-----------------------+----------------------+
 |  1    2     3     |  4       57    8      |  9      6     57     |
 |  4    56    9     |  56      37    1      |  38     378   2      |
 |  7    8    c56    |  569     2     569-3  | d135   d345  d145    |
 +-------------------+-----------------------+----------------------+
 |  2    9     46    |  3       8     56     |  7      1     456    |
 |  35   146   8     |  1256    15    7      |  235    345   9      |
 |  35   7     16    |  12569   4     2569   |  2358   358   568    |
 +-------------------+-----------------------+----------------------+
 |  8    145  b145   |  7       9    a35     |  6      2     135    |
 |  6    15    27    |  8       135   235    |  4      9     1357   |
 |  9    3     27    |  125     6     4      |  158    578   1578   |
 +-------------------+-----------------------+----------------------+

3. ALS W-Wing: (3=5)r7c6 - r7c3 = r3c3 - (5=143)r3c789 => -3 r3c6; ste
Cenoman
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Re: Rock Pool

Postby P.O. » Sun Oct 09, 2022 6:14 pm

a more concrete illustration of resolution by templates.

for each value consider two sets of cells, the set in which the value is set, the Value Cells and the set in which the value is a candidate, the Candidate Cells,
for each value to compute the templates consists in organizing the candidate cells into subsets of (9-#VC) pairwise disconnected cells, the Complementary Sets, one template is the Value Cells + one Complementary Set

then examining the Complementary Sets two observations can be made, some Candidate Cells are in all sets, some Candidate Cells are not in any of the sets, in the first case the value can be set in those cells in the second case it can be eliminated

for this puzzle it is enough to get the solution.
Hidden Text: Show
Code: Select all
Initialization:
#VT: (12 5 16 5 128 4 3 12 4)

1      2      3      4      578    58     9      6      578             
4      56     9      56     3578   1      358    3578   2               
7      8      56     569    2      3569   135    345    1345           
2      4569   456    3      589    5689   7      1      4568           
35     1456   8      1256   15     7      235    345    9               
359    7      156    12569  4      25689  2358   358    3568           
8      1459   145    7      1359   3459   6      2      135             
6      15     1257   8      135    235    4      9      1357           
59     3      12457  1259   6      2459   158    578    1578           

Value:           3
Value Cells:     (3 31 74)
Candidate Cells: (14 16 17 24 25 26 27 37 43 44 46 52 53 54 59 60 63 68 69 72)
Complementary Sets:
(17 24 43 46 63 68)
(17 24 43 46 59 72)
(17 24 37 52 63 68)
(17 24 37 52 59 72)
(16 24 44 46 63 68)
(16 24 44 46 59 72)
(16 24 37 53 63 68)
(16 24 37 53 59 72)
(14 26 43 46 63 69)
(14 26 43 46 60 72)
(14 26 37 52 63 69)
(14 26 37 52 60 72)
(14 25 44 46 63 69)
(14 25 44 46 60 72)
(14 25 37 53 63 69)
(14 25 37 53 60 72)
Candidate 3 to be eliminated in cells: (27 54)

Value:           5
Value Cells:     0
Candidate Cells: (5 6 9 11 13 14 16 17 21 22 24 25 26 27 29 30 32 33 36 37 38
                  40 41 43 44 46 48 49 51 52 53 54 56 57 59 60 63 65 66 68 69
                  72 73 75 76 78 79 80 81)
Complementary Sets:
(9 13 21 33 44 46 59 65 79)
(9 13 21 33 44 46 56 68 79)
(9 13 21 33 43 46 59 65 80)
(9 13 21 33 43 46 56 68 80)
(9 13 21 32 44 46 60 65 79)
(9 13 21 32 44 46 56 69 79)
(9 13 21 32 43 46 60 65 80)
(9 13 21 32 43 46 56 69 80)
(9 13 21 33 37 53 59 65 79)
(9 13 21 33 37 53 56 68 79)
(9 13 21 33 37 52 59 65 80)
(9 13 21 33 37 52 56 68 80)
(9 13 21 32 37 53 60 65 79)
(9 13 21 32 37 53 56 69 79)
(9 13 21 32 37 52 60 65 80)
(9 13 21 32 37 52 56 69 80)
(6 17 21 36 40 46 59 65 79)
(6 17 21 36 40 46 56 68 79)
(6 17 21 32 43 46 63 65 76)
(6 17 21 32 43 46 56 72 76)
(6 17 21 36 37 49 59 65 79)
(6 17 21 36 37 49 56 68 79)
(6 17 21 32 37 52 63 65 76)
(6 17 21 32 37 52 56 72 76)
(6 17 21 29 43 49 63 68 73)
(6 17 21 29 43 49 59 72 73)
(6 17 21 29 40 52 63 68 73)
(6 17 21 29 40 52 59 72 73)
(6 16 21 36 40 46 59 65 80)
(6 16 21 36 40 46 56 68 80)
(6 16 21 32 44 46 63 65 76)
(6 16 21 32 44 46 56 72 76)
(6 16 21 36 37 49 59 65 80)
(6 16 21 36 37 49 56 68 80)
(6 16 21 32 37 53 63 65 76)
(6 16 21 32 37 53 56 72 76)
(6 16 21 29 44 49 63 68 73)
(6 16 21 29 44 49 59 72 73)
(6 16 21 29 40 53 63 68 73)
(6 16 21 29 40 53 59 72 73)
(5 17 21 36 40 46 60 65 79)
(5 17 21 36 40 46 56 69 79)
(5 17 21 33 43 46 63 65 76)
(5 17 21 33 43 46 56 72 76)
(5 17 21 36 37 49 60 65 79)
(5 17 21 36 37 49 56 69 79)
(5 17 21 33 37 52 63 65 76)
(5 17 21 33 37 52 56 72 76)
(5 17 21 29 43 49 63 69 73)
(5 17 21 29 43 49 60 72 73)
(5 17 21 29 40 52 63 69 73)
(5 17 21 29 40 52 60 72 73)
(5 16 21 36 40 46 60 65 80)
(5 16 21 36 40 46 56 69 80)
(5 16 21 33 44 46 63 65 76)
(5 16 21 33 44 46 56 72 76)
(5 16 21 36 37 49 60 65 80)
(5 16 21 36 37 49 56 69 80)
(5 16 21 33 37 53 63 65 76)
(5 16 21 33 37 53 56 72 76)
(5 16 21 29 44 49 63 69 73)
(5 16 21 29 44 49 60 72 73)
(5 16 21 29 40 53 63 69 73)
(5 16 21 29 40 53 60 72 73)
(9 11 22 33 44 46 59 66 79)
(9 11 22 33 44 46 57 68 79)
(9 11 22 33 43 46 59 66 80)
(9 11 22 33 43 46 57 68 80)
(9 11 22 32 44 46 60 66 79)
(9 11 22 32 44 46 57 69 79)
(9 11 22 32 43 46 60 66 80)
(9 11 22 32 43 46 57 69 80)
(9 11 22 33 37 53 59 66 79)
(9 11 22 33 37 53 57 68 79)
(9 11 22 33 37 52 59 66 80)
(9 11 22 33 37 52 57 68 80)
(9 11 22 32 37 53 60 66 79)
(9 11 22 32 37 53 57 69 79)
(9 11 22 32 37 52 60 66 80)
(9 11 22 32 37 52 57 69 80)
(6 11 26 36 40 46 59 66 79)
(6 11 26 36 40 46 57 68 79)
(6 11 26 32 43 46 63 66 76)
(6 11 26 32 43 46 57 72 76)
(6 11 26 36 37 49 59 66 79)
(6 11 26 36 37 49 57 68 79)
(6 11 26 32 37 52 63 66 76)
(6 11 26 32 37 52 57 72 76)
(6 11 26 30 43 49 63 68 73)
(6 11 26 30 43 49 59 72 73)
(6 11 26 30 40 52 63 68 73)
(6 11 26 30 40 52 59 72 73)
(6 11 25 36 40 46 59 66 80)
(6 11 25 36 40 46 57 68 80)
(6 11 25 32 44 46 63 66 76)
(6 11 25 32 44 46 57 72 76)
(6 11 25 36 37 49 59 66 80)
(6 11 25 36 37 49 57 68 80)
(6 11 25 32 37 53 63 66 76)
(6 11 25 32 37 53 57 72 76)
(6 11 25 30 44 49 63 68 73)
(6 11 25 30 44 49 59 72 73)
(6 11 25 30 40 53 63 68 73)
(6 11 25 30 40 53 59 72 73)
(5 11 26 36 40 46 60 66 79)
(5 11 26 36 40 46 57 69 79)
(5 11 26 33 43 46 63 66 76)
(5 11 26 33 43 46 57 72 76)
(5 11 26 36 37 49 60 66 79)
(5 11 26 36 37 49 57 69 79)
(5 11 26 33 37 52 63 66 76)
(5 11 26 33 37 52 57 72 76)
(5 11 26 30 43 49 63 69 73)
(5 11 26 30 43 49 60 72 73)
(5 11 26 30 40 52 63 69 73)
(5 11 26 30 40 52 60 72 73)
(5 11 25 36 40 46 60 66 80)
(5 11 25 36 40 46 57 69 80)
(5 11 25 33 44 46 63 66 76)
(5 11 25 33 44 46 57 72 76)
(5 11 25 36 37 49 60 66 80)
(5 11 25 36 37 49 57 69 80)
(5 11 25 33 37 53 63 66 76)
(5 11 25 33 37 53 57 72 76)
(5 11 25 30 44 49 63 69 73)
(5 11 25 30 44 49 60 72 73)
(5 11 25 30 40 53 63 69 73)
(5 11 25 30 40 53 60 72 73)
Candidate 5 to be eliminated in cells: (14 24 27 38 41 48 51 54 75 78 81)

Value:           6
Value Cells:     (8 61 64 77)
Candidate Cells: (11 13 21 22 24 29 30 33 36 38 40 48 49 51 54)
Complementary Sets:
(13 21 36 38 51)
(13 21 33 38 54)
(11 24 36 40 48)
(11 24 30 40 54)
Candidate 6 to be eliminated in cells: (22 29 49)

Value:           9
Value Cells:     (7 12 45 71)
Candidate Cells: (22 24 29 32 33 46 49 51 56 59 60 73 76 78)
Complementary Sets:
(24 32 46 56 76)
(24 29 49 59 73)
(22 32 46 56 78)
(22 29 51 59 73)
Candidate 9 to be eliminated in cells: (33 60)
P.O.
 
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Re: Rock Pool

Postby yzfwsf » Mon Oct 10, 2022 12:34 am

How, what I know is that POM is used in most solvers only to detect whether it is possible to find a fish in a puzzle, not to solve the puzzle directly, because POM is a violent solver and belongs to a computer-biased approach. I actually have POM code written in my solver, but only use a singular POM, called before searching for complex fish to see if it is worth entering the complex fish search process.Multi-digit (3+) POMs are too difficult for humans, and of course include a lot of valid templates (10+) for single-digit POMs.
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Re: Rock Pool

Postby shye » Mon Oct 10, 2022 4:02 am

thank you all for your solves! complex fish (like yzf's) was my own solution

5s in r14c14b9 covered by b245r9c9
Xsudo Input: Show
5 Truths = {5R14 5C14 5B9}
5 Links = {5r9 5c9 5b245}
11 Eliminations --> r6c369<>5, r9c369<>5, r3c69<>5, r5c25<>5, r2c5<>5
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Re: Rock Pool

Postby P.O. » Mon Oct 10, 2022 9:56 am

@yzfwsf,
i agree, templates won't become a popular solving technique anytime soon and to place oneself from the point of view of the manual solver is perfectly legitimate but i dont think computer-biased to be a strong objection to their use as a full resolution process, complex fish, complex chains, complex patterns of all sort are computer-biased and if you remark that with practice one can learn to spot and use them then it is the same with templates, until a certain limit of course but for that matter it is true of all complex things.
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