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immpy
Joined: 06 May 2017
Posts: 571
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 Posted: Tue Jun 01, 2021 3:44 pm Post subject: VH 060121 |
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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 |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
cheers...immp |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Tue Jun 01, 2021 7:41 pm Post subject: Double Bubble |
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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: 1151
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| Posted: Tue Jun 01, 2021 8:13 pm Post subject: Explanation |
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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: 568
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| Posted: Wed Jun 02, 2021 12:24 pm Post subject: |
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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: 358
Location: Wales
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| Posted: Wed Jun 02, 2021 1:47 pm Post subject: |
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| 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 |
+------------+------------+-----------+
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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: 571
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| Posted: Wed Jun 02, 2021 5:48 pm Post subject: |
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Thanks for the kind words Mogulmeister, I appreciate them.
cheers...immp |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Wed Jun 02, 2021 9:09 pm Post subject: Thanks Immpy |
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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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