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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 940
Location: Rimini, Italy
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 Posted: Mon Jan 08, 2018 11:22 pm Post subject: Jan 09 VH |
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Hi everyone,
| Code: |
+--------------+------------+-------------+
| 7 6 89 | 2 5 1 | 4 89 3 |
| 5 4 3 | 9 8 7 | 6 2 1 |
| 1 2 89 | 6 3 4 | 589 589 7 |
+--------------+------------+-------------+
| 48 5 2 | 7 146 68 | 3 16 9 |
| 489 1789 17 | 18 1246 3 | 15 156 28 |
| 3 18 6 | 5 12 9 | 7 4 28 |
+--------------+------------+-------------+
| 28 178 17 | 4 9 5 | 128 3 6 |
| 689 3 5 | 18 16 2 | 89 7 4 |
| 2689 189 4 | 3 7 68 | 1289 189 5 |
+--------------+------------+-------------+
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Play this puzzle online at the Daily Sudoku site
1st: W-Wing 1,8 in r5c4,r6c2 connected by number 8 in r4c16 and -1 in r5c23,r6c5
| Code: |
+------------+-----------+------------+
| 7 6 89 | 2 5 1 | 4 89 3 |
| 5 4 3 | 9 8 7 | 6 2 1 |
| 1 2 89 | 6 3 4 | 589 589 7 |
+------------+-----------+------------+
| 48 5 2 | 7 146 68 | 3 16 9 |
| 489 89 7 | 18 146 3 | 15 156 2 |
| 3 1 6 | 5 2 9 | 7 4 8 |
+------------+-----------+------------+
| 28 7 1 | 4 9 5 | 28 3 6 |
| 689 3 5 | 18 16 2 | 89 7 4 |
| 2689 89 4 | 3 7 68 | 1289 189 5 |
+------------+-----------+------------+
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Play this puzzle online at the Daily Sudoku site
2nd: XY-Wing 1,6,8 in r4c68,r5c4 and -1 in r4c5,r5c78
Ciao Gianni |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Tue Jan 09, 2018 7:52 am Post subject: |
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I played the XY-Wing 1,2,8 pivoted at r6c5 and -8 in r5c9(=2) as my first step. Rinsed. Then played a UR89w/5 rows 1 and 3; columns 3 and 8 and r3c8=5 to avoid the DP. These steps could have been reversed with equal success.
cheers...immp |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Tue Jan 09, 2018 9:12 am Post subject: |
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After basics: | Code: |
+--------------+------------+-------------+
| 7 6 89 | 2 5 1 | 4 89 3 |
| 5 4 3 | 9 8 7 | 6 2 1 |
| 1 2 89 | 6 3 4 | 589 589 7 |
+--------------+------------+-------------+
| 48 5 2 | 7 146 68 | 3 16 9 |
| 489 1789 17 | 18 1246 3 | 15 156 28 |
| 3 18 6 | 5 12 9 | 7 4 28 |
+--------------+------------+-------------+
| 28 178 17 | 4 9 5 | 128 3 6 |
| 689 3 5 | 18 16 2 | 189 7 4 |
| 2689 189 4 | 3 7 68 | 1289 189 5 |
+--------------+------------+-------------+
|
Play this puzzle online at the Daily Sudoku site
Interesting. 2 fairly obvious XY-wings (12-8 pivot r6c5 and 18-6 pivot r4c6).
Both are needed to leave basics only, but they can be done in either order.
One of them (12-8 ) linked with the obvious 89 UR leaves basics, but the 18-6
and the UR are insufficient. Maybe interesting to us geeks only, but I've not
seen one like this before...... |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Tue Jan 09, 2018 9:19 am Post subject: |
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Two XY-wings:
-168
1-28
Keith |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Tue Jan 09, 2018 10:02 am Post subject: |
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With a quick look to identify some strong links, one could have also found the skyscraper on 8 (after the initial XY- Wing of 12-8).
It occurs in columns 2 and 6 (with a buddy shared in row 9); pincers then at r4c6 and r5c2. This makes r4c1-8 =4! and r5c4-8 =1!
I couldn't resist Keith, the bulb burns forever bright; I look for them all the time now. Thanks again...
immp |
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