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Free Press Sep 23, 2011

 
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Fri Sep 23, 2011 9:46 pm    Post subject: Free Press Sep 23, 2011 Reply with quote
Not yet started. May be on the easier side.

Code:
Puzzle: FP092311
+-------+-------+-------+
| 4 . . | . . . | . . 6 |
| . 2 . | 3 . 9 | 1 . . |
| . 6 . | . . 4 | . 5 . |
+-------+-------+-------+
| . . . | . . 8 | 4 . 3 |
| . 8 . | . 9 . | . 1 . |
| 3 . 4 | 5 . . | . . . |
+-------+-------+-------+
| . 3 . | 7 . . | . 6 . |
| . . 8 | 2 . 5 | . 3 . |
| 1 . . | . . . | . . 7 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Keith
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Sep 24, 2011 12:37 am    Post subject: Reply with quote
It's a fairly easy one-stepper.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Sep 24, 2011 1:13 am    Post subject: Re: Free Press Sep 23, 2011 Reply with quote
keith wrote:
Not yet started. May be on the easier side.

Right, but how do you gauge degree of difficulty before starting?

I suspect our one-steppers are different.

R4c1=7 or r4c3=1 to kill the 29 DP. The 1 proves 7 in r5c7; pincers set r4c8, r5c1<>7. A Skyscraper on 9 does it too.

Code:

+------------+----------+-----------+
| 4   19 139 | 8 5   27 | 237 79 6  |
| 5   2  7   | 3 6   9  | 1   4  8  |
| 8   6  39  | 1 27  4  | 237 5  29 |
+------------+----------+-----------+
| 279 5  129 | 6 12  8  | 4   79 3  |
| 27  8  6   | 4 9   3  | 27  1  5  |
| 3   19 4   | 5 127 27 | 6   8  29 |
+------------+----------+-----------+
| 29  3  29  | 7 8   1  | 5   6  4  |
| 6   7  8   | 2 4   5  | 9   3  1  |
| 1   4  5   | 9 3   6  | 8   2  7  |
+------------+----------+-----------+

Play this puzzle online at the Daily Sudoku site
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Sep 24, 2011 1:39 am    Post subject: Reply with quote
After basics:
Code:
+-------------+-------------+-------------+
| 4   19  139 | 8   5   27  | 237 79  6   |
| 5   2   7   | 3   6   9   | 1   4   8   |
| 8   6   39  | 1   27  4   | 237 5   29  |
+-------------+-------------+-------------+
| 279 5   129 | 6   12  8   | 4   79  3   |
| 27  8   6   | 4   9   3   | 27  1   5   |
| 3   19  4   | 5   127 27  | 6   8   29  |
+-------------+-------------+-------------+
| 29  3   29  | 7   8   1   | 5   6   4   |
| 6   7   8   | 2   4   5   | 9   3   1   |
| 1   4   5   | 9   3   6   | 8   2   7   |
+-------------+-------------+-------------+
The Skyscraper on 9 in C29 is a one-stepper.

Keith
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Sep 24, 2011 2:05 am    Post subject: Re: Free Press Sep 23, 2011 Reply with quote
Marty R. wrote:
keith wrote:
Not yet started. May be on the easier side.

Right, but how do you gauge degree of difficulty before starting?


Marty,

Sudoku Susser (SS) has a "solve" button (Shift+D) where it tells you what it takes to solve the puzzle. SS knows the regular wings and fish. It does not know skyscrapers, ERs, W, M wings, etc. If it does pick these up, they are just chains. But, SS knows all the basic and usual VH moves.

So, if I run the puzzle through SS, it will tell me if it is basic, VH, or more than VH. Without giving me more information that will spoil my fun when I solve the puzzle. For this week's puzzle, SS says:

1 x Simple Forcing Chains
1 x XY-Wing
1 x Intersection Removal
14 x Pinned Squares

My judgement says, Simple Forcing Chain is probably a skyscraper, this is probably a relatively easy puzzle.

I'll go back and post what SS says for past puzzles.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Sep 24, 2011 5:05 am    Post subject: Reply with quote
Ha ha, here I had the idea that you were looking at the givens and able to assess the difficulty. Laughing
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Sep 24, 2011 5:56 am    Post subject: Reply with quote
Marty R. wrote:
Ha ha, here I had the idea that you were looking at the givens and able to assess the difficulty. Laughing
Really? Do you need investment advice? Send money Wink

Sadly, I am not clairvoyant

Keith
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