April 14, 2014

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April 14, 2014

Postby ArkieTech » Sun Apr 13, 2014 11:21 pm

Code: Select all
 *-----------*
 |..3|...|9.8|
 |.21|.3.|...|
 |...|.7.|.5.|
 |---+---+---|
 |...|.9.|86.|
 |.6.|5.3|.4.|
 |.59|.6.|...|
 |---+---+---|
 |.4.|.1.|...|
 |...|.4.|69.|
 |6.2|...|3..|
 *-----------*


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dan
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Re: April 14, 2014

Postby Leren » Sun Apr 13, 2014 11:44 pm

Code: Select all
*--------------------------------------------------------------*
| 45    7     3      | 1246  25    12456  | 9     12    8      |
| 589   2     1      | 89    3     589    | 4     7     6      |
| 489   89    6      | 12489 7     12489  | 12    5     3      |
|--------------------+--------------------+--------------------|
| 1237 a13    4      | 127   9     127    | 8     6     5      |
| 1278  6     78     | 5     28    3      | 127   4     9      |
| 1278  5     9      | 12478 6     12478  | 127   3     12     |
|--------------------+--------------------+--------------------|
| 39    4    b78     | 369   1     69     | 5    c28    27     |
| 1378 a138   5      | 238   4     28     | 6     9     17     |
| 6     89-1  2      | 789   58    5789   | 3    d18    4      |
*--------------------------------------------------------------*

ALS W Wing: (1=8) r48c2 - r7c3 = r7c8 - (8=1) r9c8 => - 1 r9c2; stte

Leren
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Re: April 14, 2014

Postby pjb » Mon Apr 14, 2014 12:35 am

Similar,
Code: Select all
45     7      3      | 1246   25     12456  | 9      12     8     
589    2      1      | 89     3      589    | 4      7      6     
489    89     6      | 12489  7      12489  | 12     5      3     
---------------------+----------------------+---------------------
1237  d13     4      | 127    9      127    | 8      6      5     
1278   6      78     | 5      28     3      | 127    4      9     
1278   5      9      | 12478  6      12478  | 127    3      12     
---------------------+----------------------+---------------------
39     4      7-8    | 369    1      69     | 5     a28     27     
1378  d138    5      | 238    4      28     | 6      9      17     
6     c189    2      | 789    58     5789   | 3     b18     4     

(8)r7c8 = (8-1)r9c8 = r9c2 - (1=8)r48c2 => -8 r7c3; stte

Phil
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Re: April 14, 2014

Postby tlanglet » Mon Apr 14, 2014 1:13 pm

Code: Select all
 *--------------------------------------------------------------------*
 | 45     7      3      | 1246   25     12456  | 9      12     8      |
 | 589    2      1      | 89     3      589    | 4      7      6      |
 | 489    89     6      | 12489  7      12489  | 12     5      3      |
 |----------------------+----------------------+----------------------|
 | 1237  f13     4      | 127    9      127    | 8      6      5      |
 | 1278   6      78     | 5      28     3      | 127    4      9      |
 | 1278   5      9      | 12478  6      12478  | 127    3      12     |
 |----------------------+----------------------+----------------------|
 |c39     4      78     |d369    1      69     | 5      28     27     |
 | 1378  f138    5      |e238    4     d28     | 6      9      17     |
 | 6     b89-1   2      | 789    58     5789   | 3     a18     4      |
 *--------------------------------------------------------------------*

I initially found this solution while searching for a pattern...........

1r9c8=(1-9)r9c2=(9-3)r7c1=3r7c4-(3=28)r8c46-(8=13)84c2 => r9c2<>1

Ted
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Re: April 14, 2014

Postby Marty R. » Tue Apr 15, 2014 2:57 pm

Code: Select all
+-------------+----------------+-----------+
| 45   7   3  | 1246  25 12456 | 9   12 8  |
| 589  2   1  | 89    3  589   | 4   7  6  |
| 489  89  6  | 12489 7  12489 | 12  5  3  |
+-------------+----------------+-----------+
| 1237 13  4  | 127   9  127   | 8   6  5  |
| 1278 6   78 | 5     28 3     | 127 4  9  |
| 1278 5   9  | 12478 6  12478 | 127 3  12 |
+-------------+----------------+-----------+
| 39   4   78 | 369   1  69    | 5   28 27 |
| 1378 138 5  | 238   4  28    | 6   9  17 |
| 6    189 2  | 789   58 5789  | 3   18 4  |
+-------------+----------------+-----------+

Play this puzzle online at the Daily Sudoku site

Much uglier than the above solutions. :oops:

(1=8)r9c8-(8579=1)r9c4562-(13=8)r48c2-r7c3=8r7c8 contradiction=>r9c8<>8
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Re: April 14, 2014

Postby daj95376 » Tue Apr 15, 2014 4:06 pm

Marty R. wrote:_

(1=8)r9c8-(8579=1)r9c4562-(13=8)r48c2-r7c3=8r7c8 contradiction=>r9c8<>8

Marty, you were over-thinking it here. Here's your solution (simplified):

1r9c8 = r9c2 - (13=8)r48c2 - r7c3 = 8r7c8 => -8 r9c8


Note: many of my solver's short solutions used the ALS in r48c2.
daj95376
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Re: April 14, 2014

Postby Marty R. » Tue Apr 15, 2014 5:22 pm

daj95376 wrote:
Marty R. wrote:_

(1=8)r9c8-(8579=1)r9c4562-(13=8)r48c2-r7c3=8r7c8 contradiction=>r9c8<>8

Marty, you were over-thinking it here. Here's your solution (simplified):

1r9c8 = r9c2 - (13=8)r48c2 - r7c3 = 8r7c8 => -8 r9c8


Note: many of my solver's short solutions used the ALS in r48c2.


Danny,

Thanks. I wish I'd have come up with your solution. I don't think I was overthinking. I spent way too much time on this puzzle, incorrectly thinking I'd tried everything with no success. When I finally found what I posted, it was a relief to get rid of the damn thing and get on to the next one.
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Posts: 1508
Joined: 23 October 2012
Location: Rochester, New York, USA


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