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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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 Posted: Wed Oct 27, 2021 8:46 am Post subject: VH Oct 27 |
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| Code: | +--------------+---------------+--------------+
| 14 13 5 | 34 8 2 | 7 9 6 |
| 9 38 2 | 6 1347 157 | 34 15 58 |
| 48 7 6 | 345 134 9 | 3 125 258 |
+--------------+---------------+--------------+
| 3 6 7 | 2 9 4 | 5 8 1 |
| 5 4 9 | 38 13 18 | 2 6 7 |
| 18 2 18 | 7 5 6 | 9 4 3 |
+--------------+---------------+--------------+
| 2 58 48 | 1 47 57 | 6 3 9 |
| 7 15 14 | 9 6 3 | 8 25 245 |
| 6 9 3 | 458 2 58 | 1 7 45 |
+--------------+---------------+--------------+ |
After basics.
| Quote: | | Two XY wings - firstly a <348> eliminating 4 in r3c8 followed by a <134> eliminating 3's in r2c5 and r5c4 . |
Last edited by Mogulmeister on Wed Oct 27, 2021 8:54 am; edited 1 time in total |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Wed Oct 27, 2021 8:47 am Post subject: |
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| A nice challenge for the single step. |
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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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| Posted: Wed Oct 27, 2021 11:20 am Post subject: Oct27 VH |
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458xyzwing@R7C2, -4R8C2
Early Earl
PS
The above worked the first time, but on retry, I needed two xywings:
348xywing@R3C1, -3R2C7 and 134xywing@R3C3, -3R5C4.
Sorry if I misled anyone. Senior moment!
Last edited by Earl on Wed Oct 27, 2021 1:11 pm; edited 1 time in total |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Wed Oct 27, 2021 12:17 pm Post subject: Re: Oct27 VH |
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| Earl wrote: | 458xyzwing@R7C2, -4R8C2
Early Earl |
Did you mean r8c2 Earl ? |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Wed Oct 27, 2021 1:45 pm Post subject: Re: Oct27 VH |
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| Earl wrote: | 458xyzwing@R7C2, -4R8C2
Early Earl
PS
The above worked the first time, but on retry, I needed two xywings:
348xywing@R3C1, -3R2C7 and 134xywing@R3C3, -3R5C4.
Sorry if I misled anyone. Senior moment! |
No worries at all! We’ve been on this board a long time and seen a few….some junior moments too! |
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immpy
Joined: 06 May 2017
Posts: 574
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| Posted: Wed Oct 27, 2021 5:47 pm Post subject: |
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| Just looking at Mogulmeister's grid, there was just one oversight. With the 3 already placed in r3c7, this makes r2c7<>3(=4!). And r3c45<>3 as well. |
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immpy
Joined: 06 May 2017
Posts: 574
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| Posted: Wed Oct 27, 2021 5:48 pm Post subject: |
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Here is a revised after basics grid:
| Code: |
+----------+-------------+-----------+
| 14 13 5 | 34 8 2 | 7 9 6 |
| 9 38 2 | 6 137 157 | 4 15 58 |
| 48 7 6 | 45 14 9 | 3 125 258 |
+----------+-------------+-----------+
| 3 6 7 | 2 9 4 | 5 8 1 |
| 5 4 9 | 38 13 18 | 2 6 7 |
| 18 2 18 | 7 5 6 | 9 4 3 |
+----------+-------------+-----------+
| 2 58 48 | 1 47 57 | 6 3 9 |
| 7 15 14 | 9 6 3 | 8 25 245 |
| 6 9 3 | 458 2 58 | 1 7 45 |
+----------+-------------+-----------+
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Play this puzzle online at the Daily Sudoku site |
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immpy
Joined: 06 May 2017
Posts: 574
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| Posted: Wed Oct 27, 2021 5:52 pm Post subject: |
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Now the one step solution becomes the XY-Wing: 1/4/3 in r1c4,r35c5=>r2c5,r5c4<>3.
cheers...immp |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Wed Oct 27, 2021 6:21 pm Post subject: |
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That's better - thanks Immp! Sorry folks! Posted it slightly undercooked. As you say Immp - no need now for the first XY I suggested.
| immpy wrote: | Here is a revised after basics grid:
| Code: |
+----------+-------------+-----------+
| 14 13 5 | 34 8 2 | 7 9 6 |
| 9 38 2 | 6 137 157 | 4 15 58 |
| 48 7 6 | 45 14 9 | 3 125 258 |
+----------+-------------+-----------+
| 3 6 7 | 2 9 4 | 5 8 1 |
| 5 4 9 | 38 13 18 | 2 6 7 |
| 18 2 18 | 7 5 6 | 9 4 3 |
+----------+-------------+-----------+
| 2 58 48 | 1 47 57 | 6 3 9 |
| 7 15 14 | 9 6 3 | 8 25 245 |
| 6 9 3 | 458 2 58 | 1 7 45 |
+----------+-------------+-----------+
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Play this puzzle online at the Daily Sudoku site |
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TomC
Joined: 30 Oct 2020
Posts: 359
Location: Wales
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| Posted: Wed Oct 27, 2021 6:51 pm Post subject: |
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| How is the 3 placed in r3c7 with basics? |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Wed Oct 27, 2021 7:02 pm Post subject: |
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Absolutely no idea Tom - how could anyone stuff up basics ?   |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Wed Oct 27, 2021 7:04 pm Post subject: |
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| I should probably retire and leave it to Gianni. |
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TomC
Joined: 30 Oct 2020
Posts: 359
Location: Wales
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| Posted: Thu Oct 28, 2021 6:34 am Post subject: |
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| Mogulmeister, your initial post and solution is perfectly correct, confusion arises from the first grid showing r3c7 as <3> and not <34> |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Oct 28, 2021 7:16 am Post subject: |
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| Yes - a mispost of the grid. That or fat finger syndrome. |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Oct 28, 2021 7:52 am Post subject: |
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...all adds a bit of colour. Perhaps I was subconsciously remembering a post here from 2011:
| cgordon wrote: | It's been a while - but out of curiosity I revisted this forum and was interested in the comments about declining interest.
For a few years I was an avid participant of the sudoku forums.
I can recall my banters with other posters such as Nataraj and Asellius where solving problems would lead to discussions on Austrian wine or American beer. There was a social context to the forum.
But then the VH forums seemed to lose sociabilty - to the point where the regular posts now seem to consist of one regular guy revealing an xy wing. |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Oct 28, 2021 8:34 am Post subject: |
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| Code: |
+-------+-------+-------+
| . . 5 | . 8 . | . 9 . |
| . . 2 | 6 . . | . . . |
| . 7 6 | . . 9 | . . . |
+-------+-------+-------+
| 3 6 . | . 9 4 | . 8 . |
| . . . | . . . | . . . |
| . 2 . | 7 5 . | . 4 3 |
+-------+-------+-------+
| . . . | 1 . . | 6 3 . |
| . . . | . . 3 | 8 . . |
| . 9 . | . 2 . | 1 . . |
+-------+-------+-------+
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Thu Oct 28, 2021 8:39 am Post subject: |
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Here, I think is what I should have posted with the <34> pair at r23c7 still intact.
| Code: |
+--------------+---------------+--------------+
| 14 13 5 | 34 8 2 | 7 9 6 |
| 9 38 2 | 6 1347 157 | 34 15 58 |
| 48 7 6 | 345 134 9 | 34 125 258 |
+--------------+---------------+--------------+
| 3 6 7 | 2 9 4 | 5 8 1 |
| 5 4 9 | 38 13 18 | 2 6 7 |
| 18 2 18 | 7 5 6 | 9 4 3 |
+--------------+---------------+--------------+
| 2 58 48 | 1 47 57 | 6 3 9 |
| 7 15 14 | 9 6 3 | 8 25 245 |
| 6 9 3 | 458 2 58 | 1 7 45 |
+--------------+---------------+--------------+ |
Now the search for the single step can resume ? |
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immpy
Joined: 06 May 2017
Posts: 574
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| Posted: Thu Oct 28, 2021 4:18 pm Post subject: |
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Ahh, yes. That's what it should look like after basics. And one needs the two XY-Wings to solve using the VH skills.
cheers...immp |
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immpy
Joined: 06 May 2017
Posts: 574
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| Posted: Thu Oct 28, 2021 5:51 pm Post subject: |
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Would anyone like to discuss beer? I know a little bit about that. LOL
cheers...immp |
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TomC
Joined: 30 Oct 2020
Posts: 359
Location: Wales
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| Posted: Thu Oct 28, 2021 6:24 pm Post subject: |
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I've found over the years with sudoku that there are many ways to skin a grape
For those that are offended by this phrase I apologise and confirm that I am a great lover of the grape |
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