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Way too easy! - June 17th

 
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themarsman



Joined: 17 Jun 2007
Posts: 7

PostPosted: Sun Jun 17, 2007 7:13 am    Post subject: Way too easy! - June 17th Reply with quote

Usually I can solve the Very Hards but sometimes I need to come here and get some help.

This time I was able to solve the puzzle very quickly without using any advanced techniques at all. I even went back and solved it again to make sure I didn't do any incorrect eliminations.

I went to the solver online and it still rates it as Very Hard but I don't know why. Did anyone else come to the same conclusion?

Thanks!
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sun Jun 17, 2007 7:26 am    Post subject: Reply with quote

I ran it through a different solver. It does not require any "advanced" techniques. I have yet to solve it by hand.

Keith
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kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia

PostPosted: Sun Jun 17, 2007 7:43 am    Post subject: Reply with quote

Me too. Nothing VH about this one. I wonder which advanced technique the solver program had to invoke?
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themarsman



Joined: 17 Jun 2007
Posts: 7

PostPosted: Sun Jun 17, 2007 8:27 am    Post subject: Reply with quote

I went through the online solver and just doing simple eliminations it still stayed at Very Hard.

Then the nines have to be in the top row of the eighth box, so you can eliminiate the nines from the bottom two rows of this box. After that it leaves a single nine in one of the columns. After this it changed to Hard, then using simple eliminations it changed to easy.

It definitely doesn't require any advanced techniques to solve.
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

PostPosted: Sun Jun 17, 2007 4:47 pm    Post subject: June 17 Reply with quote

Yes, it is too easy for a VH.
Seems most are too easy or too hard!
The Saturday (yesterday) puzzle (6 star) that is in most major newspapers was too difficult - as are most Saturday puzzles.
Does anyone know how to solve it?

Earl
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sdq_pete



Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL

PostPosted: Sun Jun 17, 2007 8:13 pm    Post subject: Reply with quote

Personally I needed the X-wing on 9's in the following situation (rows 3 and 7):
Code:

+-------------+----------------+-------------+
| 78 3   678  | 1246 1267 5    | 14  47   9  |
| 9  2   567  | 146  1367 1367 | 8   3457 16 |
| 4  1   57   | 69   8    39   | 57  2    36 |
+-------------+----------------+-------------+
| 6  45  9    | 7    23   238  | 145 34   18 |
| 3  8   47   | 16   5    16   | 47  9    2  |
| 2  57  1    | 89   39   4    | 6   57   38 |
+-------------+----------------+-------------+
| 58 6   28   | 2589 4    289  | 3   1    7  |
| 57 479 3    | 1256 1267 1267 | 29  8    45 |
| 1  479 2478 | 3    27   278  | 29  6    45 |
+-------------+----------------+-------------+

Play this puzzle online at the Daily Sudoku site

Had I missed something simpler?

Peter
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sun Jun 17, 2007 10:33 pm    Post subject: Reply with quote

Quote:
Had I missed something simpler?


Look for <5> in R9 and <9> in C5.

Keith
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kragzy



Joined: 01 May 2007
Posts: 112
Location: Australia

PostPosted: Sun Jun 17, 2007 10:59 pm    Post subject: Reply with quote

Earl,

Load it into the grid and paste it in the forum so that we can have a go. (There is a world outside the US).
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Sun Jun 17, 2007 11:42 pm    Post subject: Reply with quote

I agree - very easy indeed. I very quickly found 2 squares on 9's - first in cols 2 & 7 - then in rows 3 & 9. There's probably some kind of esoteric Cartesian xyz name for this technique. But even with my neophyte level of Sudokuism - this was a breeze.

By the way - why did we have to wait 7 days for a "very hard".
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Mon Jun 18, 2007 1:05 am    Post subject: Reply with quote

Quote:
By the way - why did we have to wait 7 days for a"very hard".


I don't have an answer, but it seems to even out. For example, from June 3–June 10 there were four VHs.
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themarsman



Joined: 17 Jun 2007
Posts: 7

PostPosted: Mon Jun 18, 2007 6:07 am    Post subject: Reply with quote

sdq_pete wrote:
Personally I needed the X-wing on 9's in the following situation (rows 3 and 7):
Code:

+-------------+----------------+-------------+
| 78 3   678  | 1246 1267 5    | 14  47   9  |
| 9  2   567  | 146  1367 1367 | 8   3457 16 |
| 4  1   57   | 69   8    39   | 57  2    36 |
+-------------+----------------+-------------+
| 6  45  9    | 7    23   238  | 145 34   18 |
| 3  8   47   | 16   5    16   | 47  9    2  |
| 2  57  1    | 89   39   4    | 6   57   38 |
+-------------+----------------+-------------+
| 58 6   28   | 2589 4    289  | 3   1    7  |
| 57 479 3    | 1256 1267 1267 | 29  8    45 |
| 1  479 2478 | 3    27   278  | 29  6    45 |
+-------------+----------------+-------------+

Play this puzzle online at the Daily Sudoku site

Had I missed something simpler?

Peter


If you look at row seven the "9" has to be in column 4 or 6 so the nine in column five has only one nine at R6, C5.
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Mon Jun 18, 2007 9:23 am    Post subject: Re: June 17 Reply with quote

Earl wrote:

The Saturday (yesterday) puzzle (6 star) that is in most major newspapers was too difficult - as are most Saturday puzzles.
Does anyone know how to solve it?

Earl

Look here, under "Other Puzzles":

http://www.dailysudoku.co.uk/sudoku/forums/viewtopic.php?t=1923

Keith
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David



Joined: 02 Jun 2006
Posts: 58
Location: Bedford, UK

PostPosted: Mon Jun 18, 2007 11:31 am    Post subject: Reply with quote

In answer to the question as to why there is sometimes a big gap between the VH's, I think you will find that Sam has randomised the sequence of the puzzle difficulty, while maintaining the same 'weighting' for a given period (a month ?)
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RobertRattley



Joined: 24 Jun 2007
Posts: 118
Location: Australia

PostPosted: Sun Jun 24, 2007 2:01 pm    Post subject: Re: Way too easy! - June 17th Reply with quote

[quote="themarsman"]Usually I can solve the Very Hards but sometimes I need to come here and get some help.

This time I was able to solve the puzzle very quickly without using any advanced techniques at all. I even went back and solved it again to make sure I didn't do any incorrect eliminations.

I went to the solver online and it still rates it as Very Hard but I don't know why. Did anyone else come to the same conclusion?

Thanks![/quote]

Ditto. I solved it a second time in disbelief.
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