September 20, 2016

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September 20, 2016

Postby ArkieTech » Mon Sep 19, 2016 11:20 pm

Code: Select all
 *-----------*
 |...|.3.|..9|
 |.26|..9|8..|
 |...|...|67.|
 |---+---+---|
 |347|.61|.2.|
 |...|...|...|
 |.9.|45.|387|
 |---+---+---|
 |.82|...|...|
 |..9|6..|75.|
 |7..|.8.|...|
 *-----------*


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dan
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Re: September 20, 2016

Postby Leren » Mon Sep 19, 2016 11:31 pm

Code: Select all
*--------------------------------------------------------------*
| 8     7     4      | 2     3     6      | 5     1     9      |
| 15    2     6      | 157   17    9      | 8     34    34     |
| 9     13    35     | 15    4     8      | 6     7     2      |
|--------------------+--------------------+--------------------|
| 3     4     7      | 8     6     1      | 9     2     5      |
| 2     5     8      | 379   79    37     | 14    46    146    |
| 6     9     1      | 4     5     2      | 3     8     7      |
|--------------------+--------------------+--------------------|
|a45    8     2      | 1379  179   3457   | 1-4   369-4 136-4  |
| 14    13    9      | 6     2     34     | 7     5     8      |
| 7     6    b35     |b139   8     345    | 2    b349  b134    |
*--------------------------------------------------------------*

(4=5) r7c1 - (5=4) r9c3489 => - 4 r7c789; stte

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Re: September 20, 2016

Postby SteveG48 » Mon Sep 19, 2016 11:44 pm

Code: Select all
 *-----------------------------------------------------------*
 | 8     7     4     | 2     3     6     | 5     1     9     |
 | 15    2     6     | 157   17    9     | 8     34    34    |
 | 9     13    35    | 15    4     8     | 6     7     2     |
 *-------------------+-------------------+-------------------|
 | 3     4     7     | 8     6     1     | 9     2     5     |
 | 2     5     8     | 379   79    37    | 14    46    146   |
 | 6     9     1     | 4     5     2     | 3     8     7     |
 *-------------------+-------------------+-------------------|
 |b45    8     2     | 1379  179   3457  | 1-4   3469  1346  |
 | 14    13    9     | 6     2     34    | 7     5     8     |
 | 7     6    a35    |a139   8     345   | 2    a349  a134   |
 *-----------------------------------------------------------*


(4=1359)r9c3489 - (5=4)r7c1 => -4 r7c7 ; stte

Yarg. Same as Leren, but backwards.

OK, not as good, but a little different:

Code: Select all
 *-----------------------------------------------------------*
 | 8     7     4     | 2     3     6     | 5     1     9     |
 | 15    2     6     | 157  a17    9     | 8     34    34    |
 | 9     13    3-5   |a15    4     8     | 6     7     2     |
 *-------------------+-------------------+-------------------|
 | 3     4     7     | 8     6     1     | 9     2     5     |
 | 2     5     8     | 379  b79    37    | 14    46    146   |
 | 6     9     1     | 4     5     2     | 3     8     7     |
 *-------------------+-------------------+-------------------|
 | 45    8     2     | 1379 b179   3457  |c14    3469  1346  |
 | 14    13    9     | 6     2     34    | 7     5     8     |
 | 7     6    d35    |d139   8     345   | 2    d349  d134   |
 *-----------------------------------------------------------*


(5=17)b2p57 - (7=19)r57c5 - (1=4)r7c7 - (4=1359)r9c3489 => -5 r3c3 ; stte
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Re: September 20, 2016

Postby Marty R. » Tue Sep 20, 2016 12:19 am

Code: Select all
+----------+---------------+--------------+
| 8  7  4  | 2    3   6    | 5  1    9    |
| 15 2  6  | 157  17  9    | 8  34   34   |
| 9  13 35 | 15   4   8    | 6  7    2    |
+----------+---------------+--------------+
| 3  4  7  | 8    6   1    | 9  2    5    |
| 2  5  8  | 379  79  37   | 14 46   146  |
| 6  9  1  | 4    5   2    | 3  8    7    |
+----------+---------------+--------------+
| 45 8  2  | 1379 179 3457 | 14 3469 1346 |
| 14 13 9  | 6    2   34   | 7  5    8    |
| 7  6  35 | 139  8   345  | 2  349  134  |
+----------+---------------+--------------+

Play this puzzle online at the Daily Sudoku site

DP (34-46-36)r257c89 externals

3r9c89=4r5c7

4r5c7-(4=1)r7c7-r7c45=r9c4
3r9c89-(3=5)r9c3-(5=31)r3c32 => -1r3c4
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Re: September 20, 2016

Postby Marty R. » Tue Sep 20, 2016 1:14 am

SteveG48 wrote:Yarg.


Where'd you pick up that non-word, or is it an acronym? :lol:
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Re: September 20, 2016

Postby pjb » Tue Sep 20, 2016 2:37 am

Code: Select all
 8       7       4      | 2      3      6      | 5      1      9     
 15      2       6      | 157    17     9      | 8      34     34     
 9       13      35     | 15     4      8      | 6      7      2     
------------------------+----------------------+---------------------
 3       4       7      | 8      6      1      | 9      2      5     
 2       5       8      | 379    79     37     | 14     46     146   
 6       9       1      | 4      5      2      | 3      8      7     
------------------------+----------------------+---------------------
a45      8       2      | 1379   179   b3457   |1-4    369-4  136-4   
 14      13      9      | 6      2      34     | 7      5      8     
 7       6       35     | 139    8     c345    | 2     d349   d134   

(4=5)r7c1 - r7c6 = (5-4)r9c6 = r9c89 => -4 r7c789; stte

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Re: September 20, 2016

Postby SteveG48 » Tue Sep 20, 2016 1:58 pm

Marty R. wrote:
SteveG48 wrote:Yarg.


Where'd you pick up that non-word, or is it an acronym? :lol:


It's kind of like a verbal emoticon. :)

By the way, I enjoyed your solution. Given the strong link from your DP, the rest follows easily. You might want to combine the two chains into one AIC.
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Re: September 20, 2016

Postby Marty R. » Tue Sep 20, 2016 7:22 pm

"Given the strong link from your DP"

Steve, I don't understand that statement.

Is this the chain you had in mind?

4r5c7=3r9c89-(3=5)r9c3-r3c3=r2c1-(5=4)r7c1=> -4r7c7

Code: Select all
| 8  7  4  | 2    3   6    | 5  1    9    |
| 15 2  6  | 157  17  9    | 8  34   34   |
| 9  13 35 | 15   4   8    | 6  7    2    |
+----------+---------------+--------------+
| 3  4  7  | 8    6   1    | 9  2    5    |
| 2  5  8  | 379  79  37   | 14 46   146  |
| 6  9  1  | 4    5   2    | 3  8    7    |
+----------+---------------+--------------+
| 45 8  2  | 1379 179 3457 | 14 3469 1346 |
| 14 13 9  | 6    2   34   | 7  5    8    |
| 7  6  35 | 139  8   345  | 2  349  134  |
+----------+---------------+--------------+
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Re: September 20, 2016

Postby SteveG48 » Thu Sep 22, 2016 1:58 pm

Marty R. wrote:"Given the strong link from your DP"

Steve, I don't understand that statement.

Is this the chain you had in mind?

4r5c7=3r9c89-(3=5)r9c3-r3c3=r2c1-(5=4)r7c1=> -4r7c7


Hi, Marty. Sorry for the delay.

No, the chain I had in mind is just turning your second chain around and then combining it with the first. Like this:

(1=35)r3c23 - (5=3)r9c3 - [3r9c89=4r5c7][DP] - (4=1)r7c7 - r7c45 = 1r9c4 => -1 r3c4

What I meant by "given the strong link from your DP" was that you use that result as indicated in the middle of the chain. Now you have a nice, compact AIC that gives you your result.
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Re: September 20, 2016

Postby Marty R. » Thu Sep 22, 2016 11:01 pm

Thanks Steve,

I've seen people (such as you and Phil) use the DP like that in the middle of a chain, but I haven't had any luck doing it myself.
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Re: September 20, 2016

Postby SteveG48 » Fri Sep 23, 2016 12:26 am

Marty R. wrote:Thanks Steve,

I've seen people (such as you and Phil) use the DP like that in the middle of a chain, but I haven't had any luck doing it myself.


Marty, you had all the pieces of the puzzle. It's just a matter of putting them together. Inserting the [DP] in the middle like that is just justifying the link that you're using in the chain. Your observation about the DP giving you that link was the key.
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