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Helmut's Feb 20 Advanced

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Tue Feb 23, 2016 12:59 am    Post subject: Helmut's Feb 20 Advanced Reply with quote
This one provides a good example of how Helmut's Sudoku Helper works.

Code:

+-----------+-----------+-----------+
|  .  .  .  |  .  .  5  |  3  2  7  |
|  3  .  4  |  .  9  .  |  .  .  1  |
|  .  .  .  |  .  .  .  |  .  .  .  |
+-----------+-----------+-----------+
|  4  .  1  |  .  .  3  |  .  .  .  |
|  9  .  5  |  .  7  .  |  8  .  3  |
|  .  .  .  |  2  .  .  |  5  .  6  |
+-----------+-----------+-----------+
|  .  .  .  |  .  .  .  |  .  .  .  |
|  6  .  .  |  .  3  .  |  2  .  5  |
|  8  4  2  |  5  .  .  |  .  .  .  |
+-----------+-----------+-----------+


Daily Sudoku will not display the link correctly, so here it is:

http://tinyurl.com/glr8t97

Click on "HSH" and then "Do It!" to go to the helper.

(Or, click on "Play" and "Do It!" to come to DS Draw/Solve.)

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Tue Feb 23, 2016 3:03 pm    Post subject: Reply with quote
Sorry if I messed up, but working with intermediate grids gets me confused. I can't say I have a better understanding of how the Sudoku Helper works, but I do have an attempt at a solution.

Code:

+------------+--------------+------------+
| 1 89   689 | 46  468 5    | 3   2   7  |
| 3 58   4   | 7   9   2    | 6   58  1  |
| 2 578  678 | 3   168 16   | 49  589 48 |
+------------+--------------+------------+
| 4 6    1   | 8   5   3    | 79  79  2  |
| 9 2    5   | 146 7   146  | 8   14  3  |
| 7 38   38  | 2   14  9    | 5   14  6  |
+------------+--------------+------------+
| 5 1379 379 | 19  2   178  | 147 6   48 |
| 6 179  79  | 149 3   1478 | 2   78  5  |
| 8 4    2   | 5   16  167  | 17  3   9  |
+------------+--------------+------------+

Play this puzzle online at the Daily Sudoku site

Quote:
UR (58)r23c28
7r3c2=9r3c8 yield common outcome, r7c4=9, r9c6=7. The eliminations therefrom bring us to the next grid


Code:

+-------------+------------+-----------+
| 1 89   689  | 46  48 5   | 3  2   7  |
| 3 58   4    | 7   9  2   | 6  58  1  |
| 2 5789 6789 | 3   18 16  | 49 589 48 |
+-------------+------------+-----------+
| 4 6    1    | 8   5  3   | 79 79  2  |
| 9 2    5    | 146 7  146 | 8  14  3  |
| 7 38   38   | 2   14 9   | 5  14  6  |
+-------------+------------+-----------+
| 5 137  37   | 9   2  18  | 47 678 48 |
| 6 179  79   | 14  3  148 | 2  78  5  |
| 8 4    2    | 5   6  7   | 1  3   9  |
+-------------+------------+-----------+

Play this puzzle online at the Daily Sudoku site

Quote:
At this point an XY-Wing (46-1), pivot r1c4, finishes things off
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Wed Feb 24, 2016 3:17 pm    Post subject: Reply with quote
Marty,
Code:
+------------+--------------+------------+
| 1 89   689 |A46 -468 5    | 3   2   7  |
| 3 58   4   | 7   9   2    | 6   58  1  |
| 2 578  678 | 3   168 16   | 49  589 48 |
+------------+--------------+------------+
| 4 6    1   | 8   5   3    | 79  79  2  |
| 9 2    5   |B146 7  C146  | 8   14  3  |
| 7 38   38  | 2   14  9    | 5   14  6  |
+------------+--------------+------------+
| 5 1379 379 | 19  2   178  | 147 6   48 |
| 6 179  79  |1-49 3  D1478 | 2   78  5  |
| 8 4    2   | 5   16  167  | 17  3   9  |
+------------+--------------+------------+

There is an M-wing -46 that solves it. (If A is 6 C is 6. A and D are pincers on 4. HSH points this out in plain language.

You need to automate basics and then look at Advanced Moves.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Feb 24, 2016 5:06 pm    Post subject: Reply with quote
Quote:
You need to automate basics and then look at Advanced Moves.

Keith


Yes, basics are a problem.
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Thu Feb 25, 2016 10:55 pm    Post subject: Reply with quote
Marty R. wrote:
Quote:
You need to automate basics and then look at Advanced Moves.

Keith


Yes, basics are a problem.

Especially since Helmut's basics are often not so basic! Smile

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Fri Feb 26, 2016 2:16 am    Post subject: Reply with quote
Quote:
Especially since Helmut's basics are often not so basic! Smile


They're infinitely better than mine.
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