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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Sat Aug 22, 2015 8:06 pm    Post subject: 1sudoku.net Reply with quote
Code:
nš517397
+-------+-------+-------+
| . . . | . 7 . | . 3 . |
| 6 . 2 | . . . | 5 . . |
| . 3 . | 2 . 8 | . 9 . |
+-------+-------+-------+
| . . 5 | 1 . 2 | 9 . . |
| 8 . . | . . . | . . 7 |
| . . 3 | 8 . 7 | 2 . . |
+-------+-------+-------+
| . 9 . | 3 . 4 | . 1 . |
| . . 6 | . . . | 8 . 4 |
| . 5 . | . 8 . | . . . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
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bat999



Joined: 09 Jul 2015
Posts: 55
Location: UK
PostPosted: Sat Aug 22, 2015 11:44 pm    Post subject: Reply with quote
Code:
.-----------------.-------------------.-----------------.
| 1459  8     149 | 456   7      156  |  146   3    2   |
| 6     147   2   | 49    1349   139  |  5     47   8   |
| 1457  3    b147 | 2     1456   8    | c1467  9    16  |
:-----------------+-------------------+-----------------:
| 47    467   5   | 1     46     2    |  9     8    3   |
| 8     2     149 | 4569  34569  3569 |  146   456  7   |
| 149   146   3   | 8     4569   7    |  2     456  156 |
:-----------------+-------------------+-----------------:
| 2-7   9     8   | 3     256    4    | d67    1    56  |
| 3     17    6   | 579   1259   159  |  8     257  4   |
| 1247  5    a147 | 67    8      16   |  3     267  9   |
'-----------------'-------------------'-----------------'
(7)r9c3 = r3c3 - r3c7 = (7)r7c7 => -7 r7c1; stte
Cool
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Aug 23, 2015 12:02 am    Post subject: Reply with quote
bat999 wrote:
Code:
.-----------------.-------------------.-----------------.
| 1459  8     149 | 456   7      156  |  146   3    2   |
| 6     147   2   | 49    1349   139  |  5     47   8   |
| 1457  3    b147 | 2     1456   8    | c1467  9    16  |
:-----------------+-------------------+-----------------:
| 47    467   5   | 1     46     2    |  9     8    3   |
| 8     2     149 | 4569  34569  3569 |  146   456  7   |
| 149   146   3   | 8     4569   7    |  2     456  156 |
:-----------------+-------------------+-----------------:
| 2-7   9     8   | 3     256    4    | d67    1    56  |
| 3     17    6   | 579   1259   159  |  8     257  4   |
| 1247  5    a147 | 67    8      16   |  3     267  9   |
'-----------------'-------------------'-----------------'
(7)r9c3 = r3c3 - r3c7 = (7)r7c7 => -7 r7c1; stte
Cool


Basically the same elimination but a little more complicated. I started with r3c3 which established the 2nd pincer in r4c1. I then needed to back up and transport the 7 from r3c3 to r7c7 to get the elimination.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Aug 23, 2015 12:54 am    Post subject: Reply with quote
Marty R. wrote:
bat999 wrote:
Code:
.-----------------.-------------------.-----------------.
| 1459  8     149 | 456   7      156  |  146   3    2   |
| 6     147   2   | 49    1349   139  |  5     47   8   |
| 1457  3    b147 | 2     1456   8    | c1467  9    16  |
:-----------------+-------------------+-----------------:
| 47    467   5   | 1     46     2    |  9     8    3   |
| 8     2     149 | 4569  34569  3569 |  146   456  7   |
| 149   146   3   | 8     4569   7    |  2     456  156 |
:-----------------+-------------------+-----------------:
| 2-7   9     8   | 3     256    4    | d67    1    56  |
| 3     17    6   | 579   1259   159  |  8     257  4   |
| 1247  5    a147 | 67    8      16   |  3     267  9   |
'-----------------'-------------------'-----------------'
(7)r9c3 = r3c3 - r3c7 = (7)r7c7 => -7 r7c1; stte
Cool



Basically the same elimination but a little more complicated. I started with r3c3 which established the 2nd pincer in r4c1. I then needed to back up and transport the 7 from r3c3 to r7c7 to get the elimination.


My solution was a trial-and-error chain, starting with a 7 and seeing where it went. However, there's a very close pattern-based solution. Multi-coloring on 7 (Kite hinged in box 1 with one transport.)
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Sun Aug 23, 2015 12:18 pm    Post subject: 1sudoku.net Reply with quote
Code:

+--------------+-----------------+--------------+
| 1459 8   149 | 456  7     156  | 146  3   2   |
| 6    b147 2   | 49   1349  139  | 5    a47  8   |
| 1457 3   147 | 2    1456  8    | 1467 9   16  |
+--------------+-----------------+--------------+
| d47   c467 5   | 1    46    2    | 9    8   3   |
| 8    2   149 | 4569 34569 3569 | 146  456 7   |
| 149  146 3   | 8    4569  7    | 2    456 156 |
+--------------+-----------------+--------------+
| e27   9   8   | 3    256   4    | f67   1   56  |
| 3    17  6   | 579  1259  159  | 8    25-7 4   |
| 1247 5   147 | 67   8     16   | 3    26-7 9   |
+--------------+-----------------+--------------+
7 seems to be the number
Single's chains on 7: (7)r2c8=r2c2-r4c2=r4c1-r7c1=(7)r7c7 => -7r89c8; stte
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bat999



Joined: 09 Jul 2015
Posts: 55
Location: UK
PostPosted: Sun Aug 23, 2015 1:51 pm    Post subject: Reply with quote
I just realized my solution gives two eliminations...
Code:
.-----------------.-------------------.-----------------.
| 1459  8     149 | 456   7      156  |  146   3    2   |
| 6     147   2   | 49    1349   139  |  5     47   8   |
| 1457  3    b147 | 2     1456   8    | c1467  9    16  |
:-----------------+-------------------+-----------------:
| 47    467   5   | 1     46     2    |  9     8    3   |
| 8     2     149 | 4569  34569  3569 |  146   456  7   |
| 149   146   3   | 8     4569   7    |  2     456  156 |
:-----------------+-------------------+-----------------:
| 2-7   9     8   | 3     256    4    | d67    1    56  |
| 3     17    6   | 579   1259   159  |  8     257  4   |
| 1247  5    a147 | 67    8      16   |  3     26-7 9   |
'-----------------'-------------------'-----------------'
(7)r9c3 = r3c3 - r3c7 = (7)r7c7 => -7 r7c1, r9c8; stte
Cool
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Aug 23, 2015 8:24 pm    Post subject: Reply with quote
Clement,

I took a look at that 1Sudoku.net site. With my (very limited) computer skills, I found the site not easy to navigate. Do you consider the site to be a good source of good puzzles? What puzzle rating do you prefer?
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Clement



Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
PostPosted: Sun Aug 23, 2015 10:39 pm    Post subject: Reply with quote
Marty R. wrote:
Clement,

I took a look at that 1Sudoku.net site. With my (very limited) computer skills, I found the site not easy to navigate. Do you consider the site to be a good source of good puzzles? What puzzle rating do you prefer?
No, few of them do pose a challenge. I prefer the ones rated as evil, which are also just normal. I will look for other sites.
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