Historical Daily 18

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Historical Daily 18

Postby Leren » Sun May 20, 2018 6:51 am

Code: Select all
*-----------*
|5..|..6|...|
|6..|.8.|3..|
|.1.|2.9|.6.|
|---+---+---|
|...|..4|.3.|
|.7.|.9.|42.|
|.3.|6.8|..9|
|---+---+---|
|.4.|..1|98.|
|..8|9..|..6|
|..7|...|.1.|
*-----------*
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Re: Historical Daily 18

Postby eleven » Sun May 20, 2018 11:18 am

I would call that devilfish.
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Re: Historical Daily 18

Postby pjb » Sun May 20, 2018 1:37 pm

Code: Select all
 5       8       2349   | 1347   137    6      | 127    79     1247   
 6       29      249    |d1457   8     d57     | 3     c579    12457 
 7       1       34     | 2     e35     9      | 8      6      45     
------------------------+----------------------+---------------------
 2       59      159    |g157   f157    4      | 6      3      8     
 8       7       6      | 135    9      35     | 4      2     j15     
 4       3      a15     | 6      2      8      | 57-1  b57     9     
------------------------+----------------------+---------------------
 3       4       25     |h57     6      1      | 9      8     i257   
 1       25      8      | 9      357    2357   | 257    4      6     
 9       6       7      | 8      4      25     | 25     1      3     

(1=5)r6c3 - r6c8(r4c23,r7c3) = r2c8 - r2c46 = r3c5 - r4c5 = r4c4 - r7c4 = r7c9 - (5=1)r5c9 => -1 r6c7; stte

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Re: Historical Daily 18

Postby SteveG48 » Sun May 20, 2018 2:27 pm

Code: Select all
 *--------------------------------------------------------------------*
 | 5      8      2349   |f1347 de137    6      | 127    79     1247   |
 | 6      29     249    |f1457   8     e57     | 3      579    12457  |
 | 7      1      34     | 2    de35     9      | 8      6      45     |
 *----------------------+----------------------+----------------------|
 | 2      59     159    |f157   e157    4      | 6      3      8      |
 | 8      7      6      | 135    9     a35     | 4      2     i1-5    |
 | 4      3     i15     | 6      2      8      |j157   j57     9      |
 *----------------------+----------------------+----------------------|
 | 3      4      h25    |g57     6      1      | 9      8     h257    |
 | 1      25     8      | 9     c357   b2357   | 257    4      6      |
 | 9      6      7      | 8      4      25     | 25     1      3      |
 *--------------------------------------------------------------------*


(5=3)r5c6 - r8c6 = 3r8c5 - 3r13c5 = (175)b3p268&r134c5 - 7r124c4 = 7r7c4 - (7=25)r7c39 -5r5c9&r5c3 = 5r6c78 => -5 r5c9 ; stte
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Re: Historical Daily 18

Postby Leren » Mon May 21, 2018 8:22 pm

Link to the original puzzle is here. Leren
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Re: Historical Daily 18

Postby SteveG48 » Mon May 21, 2018 9:43 pm

Interesting. I like the logic of the solution that I gave back then, but there's no way that I would accept the AIC that I wrote then without inserting some "memory" stars.

Is there an easy way to convert the solutions given back then to solutions for the morphed puzzle?
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Re: Historical Daily 18

Postby Leren » Tue May 22, 2018 1:36 am

Hi Steve, unfortunately not. The reason is that, just for fun, I control my morphing process by a series of random numbers, so I get a different random morph each time.

You just have to study the pattern of the post basics grid and figure out where everything has been moved to and relabelled. I did that myself in the previous puzzle and it was a bit of an effort.

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Re: Historical Daily 18

Postby Cenoman » Tue May 22, 2018 8:35 am

Leren wrote:Link to the original puzzle is here. Leren


Interesting puzzle in itself. Thank you Leren.

Reading JC Van Hay's analysis of the original puzzle is much interesting too... Last JC's post on this forum is dated January 5, 2018. No post either on other forums since quite same dates.

JC Van Hay, we miss you !
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Re: Historical Daily 18

Postby eleven » Tue May 22, 2018 8:24 pm

SteveG48 wrote:Is there an easy way to convert the solutions given back then to solutions for the morphed puzzle?

It's not so hard, but takes some minutes.
The box with the elimination is the only one with two 2 and one 3 candidates cells not in L pattern.
So the eliminated digit must be 1, and so on ...
Code: Select all
     *--------------------------------------------------------------------*
     | 5      8      2349   | 1347   137    6      | 127    79     1247   |
     | 6      29     249    | 1457   8     d57     | 3     c579   b12457  |
     | 7      1      34     | 2      35     9      | 8      6     b45     |
     *----------------------+----------------------+----------------------|
     | 2      59     159    | 157    157    4      | 6      3      8      |
     | 8      7      6      | 135    9     b35     | 4      2     a15     |
     | 4      3     h15     | 6      2      8      | 57-1   57     9      |
     *----------------------+----------------------+----------------------|
     | 3      4     g25     |f57     6      1      | 9      8     b257    |
     | 1      25     8      | 9      357   e2357   | 257    4      6      |
     | 9      6      7      | 8      4     e25     | 25     1      3      |
     *--------------------------------------------------------------------*

(1=5)r5c9 - r5c6*|r237**c9 = r2c8 - r2c6 = *r89c6 - r7c4 = **r7c3 - (5=1)r6c3 => -1r6c7
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Re: Historical Daily 18

Postby SteveG48 » Tue May 22, 2018 8:34 pm

Thanks, Eleven!
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