Menneske 6457837

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Menneske 6457837

Postby ArkieTech » Wed Oct 09, 2013 12:06 am

Code: Select all
 *-----------*
 |.5.|.97|...|
 |..7|34.|...|
 |9.8|...|4..|
 |---+---+---|
 |2..|.5.|.1.|
 |78.|2.1|.93|
 |.1.|.7.|..2|
 |---+---+---|
 |..9|...|1.7|
 |...|.86|9..|
 |...|72.|.6.|
 *-----------*


Play/Print this puzzle online
dan
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Re: Menneske 6457837

Postby Leren » Wed Oct 09, 2013 2:42 am

Code: Select all
*--------------------------------------------------------------*
| 4     5     26     |b68    9     7      | 2368  38    1      |
| 1     26    7      | 3     4     58     | 26    58    9      |
| 9     3     8      |c56    1     2      | 4     7    d56     |
|--------------------+--------------------+--------------------|
| 2     9     36     |a48    5     348    | 7     1    e46-8   |
| 7     8     4      | 2     6     1      | 5     9     3      |
| 356   1     356    | 9     7     348    | 68    48    2      |
|--------------------+--------------------+--------------------|
| 68    26    9      | 45    3     45     | 1     28    7      |
| 35    7     235    | 1     8     6      | 9     2345  45     |
| 358   4     1      | 7     2     9      | 38    6     58     |
*--------------------------------------------------------------*

L2 Wing: (8) r4c4 = (8-6) r1c4 = r3c4 - r3c9 = (6) r4c9 => - 8 r4c9; stte

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Re: Menneske 6457837

Postby pjb » Wed Oct 09, 2013 5:20 am

Code: Select all
 4      5     a26     | 68     9      7      | 2368   38     1     
 1      26     7      | 3      4      58     | 26     58     9     
 9      3      8      | 56     1      2      | 4      7      56     
 ---------------------+----------------------+---------------------
 2      9      3-6    | 48     5      348    | 7      1      468   
 7      8      4      | 2      6      1      | 5      9      3     
#356    1     #356    | 9      7      348    | 68     48     2     
 ---------------------+----------------------+---------------------
 68     26     9      | 45     3      45     | 1      28     7     
#35     7     #235    | 1      8      6      | 9      2345   45     
 358    4      1      | 7      2      9      | 38     6      58     

(6=2) r1c3 - (2=6) [UR 35: r68c13] => -6 r4c3; stte

Phil
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Re: Menneske 6457837

Postby Marty R. » Wed Oct 09, 2013 4:31 pm

Code: Select all
+------------+----------+---------------+
| 4   5  26  | 68 9 7   | 2368 38   1   |
| 1   26 7   | 3  4 58  | 26   58   9   |
| 9   3  8   | 56 1 2   | 4    7    56  |
+------------+----------+---------------+
| 2   9  36  | 48 5 348 | 7    1    468 |
| 7   8  4   | 2  6 1   | 5    9    3   |
| 356 1  356 | 9  7 348 | 68   48   2   |
+------------+----------+---------------+
| 68  26 9   | 45 3 45  | 1    28   7   |
| 35  7  235 | 1  8 6   | 9    2345 45  |
| 358 4  1   | 7  2 9   | 38   6    58  |
+------------+----------+---------------+

Play this puzzle online at the Daily Sudoku site

DP(35)r68c13 (356=8)r6c137 --DP-- r8c3=2-(2=6)r7c2-r2c2=r2c7-(6=8)r6c7=>r6c7=8
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Re: Menneske 6457837

Postby tlanglet » Thu Oct 10, 2013 2:26 am

Had some time this evening.............

Code: Select all
 *-----------------------------------------------------------*
 | 4     5     26    | 68    9     7     | 2368  38    1     |
 | 1     26    7     | 3     4     58    | 26    58    9     |
 | 9     3     8     | 56    1     2     | 4     7     56    |
 |-------------------+-------------------+-------------------|
 | 2     9     36    | 48    5     348   | 7     1     468   |
 | 7     8     4     | 2     6     1     | 5     9     3     |
 | 356   1     356   | 9     7     348   | 68    48    2     |
 |-------------------+-------------------+-------------------|
 | 68    26    9     | 45    3     45    | 1     28    7     |
 | 35    7     235   | 1     8     6     | 9     2345  45    |
 | 358   4     1     | 7     2     9     | 38    6     58    |
 *-----------------------------------------------------------*

8r4c4=(8-6)r1c4=6r3c4-(6=58)r49c9 => r4c9<>8

Ted
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Re: Menneske 6457837

Postby tlanglet » Thu Oct 10, 2013 2:47 am

Phil & Marty,

Would you both expand your solution as I am not able to understand the logic. For example, what are your strong inferences?

Ted
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Re: Menneske 6457837

Postby Marty R. » Thu Oct 10, 2013 4:01 am

tlanglet wrote:Phil & Marty,

Would you both expand your solution as I am not able to understand the logic. For example, what are your strong inferences?

Ted


I guess my strong inference doesn't show. Obviously it's 6r6c13=2r8c3 and I wasn't comfortable with my notation.
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Re: Menneske 6457837

Postby pjb » Thu Oct 10, 2013 6:06 am

This is how I see it:
if (6) r1c3 is true then (6) r4c3 is false
if (6) r1c3 is false then (2) r1c3 is true and (2) r8c3 is false. Then to avoid the DP, one of the 6's at r6c1 or r6c3 must be true, making the 6 at r4c3 false.
Phil
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Re: Menneske 6457837

Postby ArkieTech » Thu Oct 10, 2013 12:02 pm

tlanglet wrote:what are your strong inferences?


Isn't (2=6)UR:35r68c13 a strong reference? :?
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Re: Menneske 6457837

Postby tlanglet » Thu Oct 10, 2013 1:12 pm

pjb wrote:This is how I see it:
if (6) r1c3 is true then (6) r4c3 is false
if (6) r1c3 is false then (2) r1c3 is true and (2) r8c3 is false. Then to avoid the DP, one of the 6's at r6c1 or r6c3 must be true, making the 6 at r4c3 false.
Phil


Phil,

Sorry about the query. I simply could not see the obvious.

Some time ago when the Eureka forum was functional, one of the guru's suggested the following notation:

(6=2)r1c3-AUR(35)r68c13[2r8c3=6r6c13] => r4c3<>6

Ted
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