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immpy
Joined: 06 May 2017
Posts: 571
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 Posted: Mon Sep 19, 2022 10:12 pm Post subject: VH 091922 |
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Hello all, enjoy the puzzle.
| Code: |
+-------+-------+-------+
| . . 2 | . . . | . . 5 |
| . 8 . | 5 . . | 6 . . |
| 6 . 1 | 2 . . | . 4 . |
+-------+-------+-------+
| . 7 . | . 3 . | . . . |
| . . . | 8 1 7 | . . . |
| 2 . . | 6 5 . | 4 7 . |
+-------+-------+-------+
| 7 2 . | . . . | 9 . 4 |
| . 6 9 | . . 5 | . 1 . |
| . . 5 | 9 . . | 8 . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
cheers...immp |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Tue Sep 20, 2022 11:36 am Post subject: VH 091922 |
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| Code: |
+-----------------+---------------------+-------------------+
| 349 349 2 | f13 46789 13468 |e137 389 5 |
| 349 8 7 | 5 49 134 | 6 239 1239 |
| 6 5 1 | 2 789 38 | 37 4 389 |
+-----------------+---------------------+-------------------+
|c1589 7 6 | 4 3 2 |d15 89 189 |
| 359 39 4 | 8 1 7 | 235 239 6 |
| 2 13 b38 | 6 5 9 | 4 7 138 |
+-----------------+---------------------+-------------------+
| 7 2 a38 | g1-3 68 1368 | 9 5 4 |
| 48 6 9 | 7 48 5 | 23 1 23 |
| 134 134 5 | 9 2 34 | 8 6 7 |
+-----------------+---------------------+-------------------+
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(3=8)r7c3 - r6c3 = (8-5)r4c1 = (5-1)r4c7 = r1c7 - r1c4 = (1)r7c4 => - 1r7c4; btte |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Wed Sep 21, 2022 12:03 pm Post subject: |
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| Correction above .....=> -3r7c4 |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Wed Sep 21, 2022 4:33 pm Post subject: |
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Hello all. I didn't attempt to solve this one using only the common VH techniques. I spotted a WXYZ-Wing of (1368) r3c6, r7c456. Hence r9c6<>3=4! stte
cheers...immp |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Wed Sep 21, 2022 4:54 pm Post subject: |
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The path for using VH techniques exclusively follows.
Step1: XY-Wing 34-8 in r39c6,r8c5=>r13c5,r7c6<>8. |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Wed Sep 21, 2022 4:58 pm Post subject: |
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| Step2: XYZ-Wing 1-37 in r1c47,r3c7=>r1c8<>3. |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Wed Sep 21, 2022 5:00 pm Post subject: |
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| Naked Pair of 89 in column 8. And then Locked Candidates 9 in box6. |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Wed Sep 21, 2022 5:02 pm Post subject: |
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Step 3: XYZ-Wing 1-34 in r1c4,r29c6=>r13c6<>3.
Basics after that.
cheers...immp |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Wed Sep 21, 2022 8:04 pm Post subject: |
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| Hi immp! Am I wrong? I thought I solved this one with just one VH move? The 134 XYZ Wing with pivot at r2c6 and tips at r1c4 and r9c6 (-3r13c6). |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Thu Sep 22, 2022 11:45 pm Post subject: |
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Heh heh, not wrong at all there dongrave. That does indeed solve it with one VH move. Good eye!
cheers...immp |
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