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Times SF4

 
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keith



Joined: 19 Sep 2005
Posts: 3165
Location: near Detroit, Michigan, USA

PostPosted: Sat Jul 28, 2012 11:15 pm    Post subject: Times SF4 Reply with quote

4th of 9.
Code:
Puzzle: TimesSF4
+-------+-------+-------+
| . 2 . | . . 9 | . 1 . |
| 9 . 7 | 3 . . | . . 5 |
| . . . | . 7 . | . 3 . |
+-------+-------+-------+
| 7 . . | 2 . 4 | . 9 . |
| . . 6 | . . . | 4 . . |
| . 9 . | 6 . 7 | . . 1 |
+-------+-------+-------+
| . 5 . | . 9 . | . . . |
| 4 . . | . . 3 | 1 . 9 |
| . 8 . | 7 . . | . 2 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sun Jul 29, 2012 12:42 am    Post subject: Reply with quote

I'll do it again if you tell me it's necessary, but on the first try it was basics only.

P.S. Same result when I did it on Draw/Play.
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keith



Joined: 19 Sep 2005
Posts: 3165
Location: near Detroit, Michigan, USA

PostPosted: Sun Jul 29, 2012 1:27 am    Post subject: Reply with quote

Marty R. wrote:
I'll do it again if you tell me it's necessary, but on the first try it was basics only.

P.S. Same result when I did it on Draw/Play.

Yes. According to Sudoku Susser, one naked pair and one hidden pair, plus singles.

I don't recall the moves I used when I solved it.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sun Jul 29, 2012 1:55 am    Post subject: Reply with quote

Quote:
According to Sudoku Susser, one naked pair and one hidden pair, plus singles.


Does that mean the Susser is the way that everyone is going to do it? The point I'm trying to make is that I thought basics could vary depending on the sequence in which the player populates the grid, sometimes discovering moves during this process that wouldn't be necessary as part of basics if he populated it differently.
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keith



Joined: 19 Sep 2005
Posts: 3165
Location: near Detroit, Michigan, USA

PostPosted: Sun Jul 29, 2012 2:26 am    Post subject: Reply with quote

Marty R. wrote:
Quote:
According to Sudoku Susser, one naked pair and one hidden pair, plus singles.


Does that mean the Susser is the way that everyone is going to do it? The point I'm trying to make is that I thought basics could vary depending on the sequence in which the player populates the grid, sometimes discovering moves during this process that wouldn't be necessary as part of basics if he populated it differently.

Marty,

I think SS will find the hard points that everyone has to solve. At each move, naked single, hidden single, naked pair, hidden pair, naked triple, hidden triple, line/box interactions, quads, remote pairs. Then, it goes on with fish, XY-wings, XYZ-wings, etc. You can exclude or reorder the sequence of what it looks for.

I think most solvers are similar, though draw/play is not explicit about "why".

So, in this puzzle, singles get you here:
Code:
+-------------------+-------------------+-------------------+
| 3568  2     358   | 458   4568  9     | 678   1     4678  |
| 9     146   7     | 3     2     168   | 68    468   5     |
| 1568  146   158   | 1458  7     1568  | 9     3     2     |
+-------------------+-------------------+-------------------+
| 7     13    1358  | 2     1358  4     | 3568  9     368   |
| 2     13    6     | 9     1358  158   | 4     578   378   |
| 358   9     4     | 6     358   7     | 2     58    1     |
+-------------------+-------------------+-------------------+
| 136   5     13    | 148   9     2     | 3678  4678  34678 |
| 4     7     2     | 58    568   3     | 1     568   9     |
| 136   8     9     | 7     1456  156   | 356   2     346   |
+-------------------+-------------------+-------------------+

Now what? The naked pair 13 in B4. I don't see anything else.

Further singles get us here:
Code:
+----------------+----------------+----------------+
| 3    2    58   | 458  568  9    | 678  1    4678 |
| 9    46   7    | 3    2    1    | 68   468  5    |
| 58   46   1    | 458  7    568  | 9    3    2    |
+----------------+----------------+----------------+
| 7    13   58   | 2    158  4    | 3568 9    368  |
| 2    13   6    | 9    158  58   | 4    578  378  |
| 58   9    4    | 6    3    7    | 2    58   1    |
+----------------+----------------+----------------+
| 6    5    3    | 1    9    2    | 78   478  478  |
| 4    7    2    | 58   568  3    | 1    568  9    |
| 1    8    9    | 7    4    56   | 356  2    36   |
+----------------+----------------+----------------+

Now what? Well, there's a hidden pair 35 in C7 and a triple 478 in B9.

I think everyone would have to go through these steps to remove all the singles.

Or, what I probably did: In the second diagram above there is a SS on 6 in C58.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sun Jul 29, 2012 3:41 am    Post subject: Reply with quote

Thanks for taking the time for that detailed reply. Of course, I forgot most of what I did.
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keith



Joined: 19 Sep 2005
Posts: 3165
Location: near Detroit, Michigan, USA

PostPosted: Sun Jul 29, 2012 4:14 am    Post subject: Reply with quote

Marty R. wrote:
Thanks for taking the time for that detailed reply. Of course, I forgot most of what I did.

Yes, I know. You were probably distracted by watching that most British of all Olympic sports, women's beach volleyball.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sun Jul 29, 2012 5:05 am    Post subject: Reply with quote

I like the sport, but don't care for the uniforms. Wink
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