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VH 060121

 
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Tue Jun 01, 2021 3:44 pm    Post subject: VH 060121 Reply with quote

Hello all, enjoy the puzzle...

Code:

+-------+-------+-------+
| . . 5 | 4 . . | 2 . 6 |
| . . . | 7 . . | 3 . . |
| 1 3 . | . 6 . | . . 8 |
+-------+-------+-------+
| . . . | . 2 8 | 7 . . |
| . 8 . | 3 . . | . . 1 |
| . . . | . 4 6 | 9 . . |
+-------+-------+-------+
| 4 5 . | . 3 . | . . 9 |
| . . . | 9 . . | 1 . . |
| . . 2 | 6 . . | . . 7 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp
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Mogulmeister



Joined: 03 May 2007
Posts: 888

PostPosted: Tue Jun 01, 2021 7:41 pm    Post subject: Double Bubble Reply with quote

Thanks Immpy

This is a very interesting puzzle for a VH and I can only echo dongrave’s thanks in a previous VH. After basics:



Last edited by Mogulmeister on Wed Jun 02, 2021 9:10 am; edited 2 times in total
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Mogulmeister



Joined: 03 May 2007
Posts: 888

PostPosted: Tue Jun 01, 2021 8:13 pm    Post subject: Explanation Reply with quote

Forgive the slightly flamboyant display but sometimes a picture tells a story (I hope).

You can view this in a few ways - I will mention a couple.

1)A simultaneous enactment of a couple of overlaid Y Wings

They have a common anchor cell or jumping off point in r1c2 which is coloured red. The key elimination cell r3c3 is blue.

Link r1c2 with the pink cells and r3c3 <> 7
Link r1c2 with the green cells and r23c3 <> 9

2)AN ALS pair eliminating 7 and 9 from r3c3. (Does anyone sniff a death blossom ?)
The restricted common for ALS pink is 9 so the common candidate is 7 and the restricted common for ALS green is 7 and the common candidate is 9.

R3c3 must be 4.

In plain language, whichever candidate you start in r1c2 (either 7 or 9), there is a double elimination in r3c3 leaving only 4.


Last edited by Mogulmeister on Tue Aug 31, 2021 9:23 am; edited 2 times in total
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dongrave



Joined: 06 Mar 2014
Posts: 446

PostPosted: Wed Jun 02, 2021 12:24 pm    Post subject: Reply with quote

Beginning with Mogulmeister's grid I used the following chain:

(1=9)r9c2 - (9=7*)r1c2 - (7=1)r6c2 - (1=9)r4c3 - (7*9=4)r3c3 - (4=5)r3c7 - (5=9)r3c6 - (9=7)r5c6 - (7=1)r7c6 => r7c3 <> 1; stte.
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TomC



Joined: 30 Oct 2020
Posts: 110
Location: Wales

PostPosted: Wed Jun 02, 2021 1:47 pm    Post subject: Reply with quote

Code:

+------------+------------+-----------+
| 789 79 5   | 4  189 3   | 2  179 6  |
| 6   2  489 | 7  189 159 | 3  19  45 |
| 1   3  479 | 2  6   59  | 45 79  8  |
+------------+------------+-----------+
| 59  4  19  | 15 2   8   | 7  6   3  |
| 2   8  6   | 3  79  79  | 45 45  1  |
| 357 17 137 | 15 4   6   | 9  8   2  |
+------------+------------+-----------+
| 4   5  17  | 8  3   17  | 6  2   9  |
| 378 6  378 | 9  57  2   | 1  345 45 |
| 39  19 2   | 6  15  4   | 8  35  7  |
+------------+------------+-----------+

Play this puzzle online at the Daily Sudoku site

using the 179 wing in box 1 and 4 gives r1c58 <> 9
then XYZ 189 wing in box 2 and 3 gives r2c6 <> 1
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immpy



Joined: 06 May 2017
Posts: 455

PostPosted: Wed Jun 02, 2021 5:48 pm    Post subject: Reply with quote

Thanks for the kind words Mogulmeister, I appreciate them.

cheers...immp
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Mogulmeister



Joined: 03 May 2007
Posts: 888

PostPosted: Wed Jun 02, 2021 9:09 pm    Post subject: Thanks Immpy Reply with quote

I am so pleased that you are doing what you're doing Immpy. I used to hang out here in the old days (search for details!) As Keith said, this was one of the few civilised Sudoku hangouts. It is a broad church with room for all abilities. Pencil and paper wizards and solvers sat side by side.

Marty R. wrote:

A small selection of other forums members who disappeared

Steve R, Mogulmeister, Johan, Storm Norm,
Wapati, Luke451, Re'born, and Tracy (Tkiel).
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