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May 2 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Mon May 01, 2017 11:44 pm    Post subject: May 2 VH Reply with quote

Basics only
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK

PostPosted: Tue May 02, 2017 2:23 pm    Post subject: May 2 NVH Reply with quote

Code:

+--------------+------------+-------------+
| 1367 2   9   | 67 357 8   | 57 4   137  |
| 5    67  4   | 1  37  369 | 2  79  8    |
| 137  18  178 | 2  4   359 | 6  15  1379 |
+--------------+------------+-------------+
| 167  3   2   | 4  8   56  | 9  156 17   |
| 4    18  178 | 9  357 356 | 57 156 2    |
| 679  679 5   | 67 2   1   | 8  3   4    |
+--------------+------------+-------------+
| 8    4   3   | 5  9   7   | 1  2   6    |
| 2    79  6   | 8  1   4   | 3  79  5    |
| 179  5   17  | 3  6   2   | 4  8   79   |
+--------------+------------+-------------+

Play this puzzle online at the Daily Sudoku site

I think that the software is using the X wing on 3 c19 to solve it
(making it the most easy of VHs), while the box-line interaction
(b2r2) is a 'basic' way to remove the crucial 3 in r1c5.
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Tue May 02, 2017 4:05 pm    Post subject: Reply with quote

Hi everyone,

I think that to quickly reach the solution with one step it is necessary to use the technique the fin-x-wing on 7 c57, with the elimination of 7 on R1C4, fin 7 on R2C5.




Ciao Paolo
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Earl



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

PostPosted: Wed May 03, 2017 3:08 am    Post subject: May 2 VH Reply with quote

I agree with Clement - it is basics only.

Early Earl
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Wed May 03, 2017 9:09 am    Post subject: Re: May 2 VH Reply with quote

Hi everyone,

If we mean "basic strategies" in addition to naked singles, hidden singles and locked candidates even naked subset, I also agree,because it is possible to delete 7 in R1C4 with naked pairs (cells E1, G1).

Ciao Paolo
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immpy



Joined: 06 May 2017
Posts: 571

PostPosted: Mon May 08, 2017 12:56 pm    Post subject: Reply with quote

Hello all.

I tend to agree with the "basics" theory. After solving it I felt that maybe this one should have been rated Hard.

Still a good puzzle.


immpy
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