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immpy
Joined: 06 May 2017 Posts: 571
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Posted: Thu Dec 30, 2021 6:37 pm Post subject: VH 123021 |
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Hello all, enjoy the puzzle. Happy New Year!
Code: |
+-------+-------+-------+
| . . 9 | . . 4 | 8 . . |
| 5 8 . | . . 7 | . . . |
| . 7 . | 6 . . | . 9 . |
+-------+-------+-------+
| 8 . . | . . . | 5 1 . |
| . . . | 3 8 1 | . . . |
| . 2 1 | . . 5 | . . 6 |
+-------+-------+-------+
| . 5 . | . . 9 | . 7 . |
| . . . | 5 . . | . 3 4 |
| . . 2 | 7 . . | 9 . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site
cheers...immp |
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ZeroAssoluto
Joined: 05 Feb 2017 Posts: 933 Location: Rimini, Italy
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Posted: Thu Dec 30, 2021 8:16 pm Post subject: |
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Hi immpy,
Code: |
+-----------+-------------+-------------+
| 123 13 9 | 12 5 4 | 8 6 7 |
| 5 8 6 | 129 239 7 | 1234 24 123 |
| 12 7 4 | 6 23 8 | 123 9 5 |
+-----------+-------------+-------------+
| 8 34 7 | 249 269 26 | 5 1 39 |
| 469 46 5 | 3 8 1 | 7 24 29 |
| 349 2 1 | 49 7 5 | 34 8 6 |
+-----------+-------------+-------------+
| 146 5 3 | 8 1246 9 | 126 7 12 |
| 7 9 8 | 5 126 26 | 126 3 4 |
| 146 146 2 | 7 146 3 | 9 5 8 |
+-----------+-------------+-------------+
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Play this puzzle online at the Daily Sudoku site
XY-Wing 3,4,9 in r4c9,r6c47 and -9 in r4c45
or
WXYZ-Wing 3,4,6,9 in r4c29,r5c12 and -9 in r5c9
Happy New Year
Gianni |
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TomC
Joined: 30 Oct 2020 Posts: 358 Location: Wales
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Posted: Fri Dec 31, 2021 7:34 pm Post subject: |
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Thanks Immpy, a nice puzzle to end the year
Sometimes patterns are nice to spot, but may or not help you solve
In this case, you can remove the 1 in r7c1 as you would get <46> pair in box 7 and then also r7c9=2, r5c9=9 gives <46> pair in box 4 creating UR
This led me to say if r6c1=9, r6c7=3, r4c9=9 leads to no <9> in box 5
Happy New Year
Tom |
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Mogulmeister
Joined: 03 May 2007 Posts: 1151
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Posted: Tue Jan 04, 2022 10:15 pm Post subject: |
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Well since 9's are the focus, I will look elsewhere to a nice XY chain.
Pincers for 4 at r4c2 and r5c8 means r5c12 < > 4. Follow a-d. Or d-a if you prefer.
Code: | +-----------+-------------+-------------+
| 123 13 9 | 12 5 4 | 8 6 7 |
| 5 8 6 | 129 239 7 | 1234 24 123 |
| 12 7 4 | 6 23 8 | 123 9 5 |
+-----------+-------------+-------------+
| 8 34a 7 | 249 269 26 | 5 1 39b |
| ⓸69 ⓸6 5 | 3 8 1 | 7 24d 29c |
| 349 2 1 | 49 7 5 | 34 8 6 |
+----------+-------------+-------------+
| 146 5 3 | 8 1246 9 | 126 7 12 |
| 7 9 8 | 5 126 26 | 126 3 4 |
| 146 146 2 | 7 146 3 | 9 5 8 |
+-----------+-------------+-------------+ |
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TomC
Joined: 30 Oct 2020 Posts: 358 Location: Wales
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Posted: Wed Jan 05, 2022 11:56 am Post subject: |
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Extend the XY chain by one and r6c7 <> 4 as then a=4 and no <4> in box 5 |
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Mogulmeister
Joined: 03 May 2007 Posts: 1151
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Posted: Wed Jan 05, 2022 3:24 pm Post subject: |
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Extend it one further still and we get r6c4 < > 4 because if it was then another 4 gets put into r4c4 - two 4’s in box 5. Contradiction. |
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Mogulmeister
Joined: 03 May 2007 Posts: 1151
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Posted: Wed Jan 05, 2022 4:43 pm Post subject: |
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….if you insist r6c4 = 4 then r4c4 < > 4.
It also means there’s a 9 in r4c9. So r4c4 < > 9
That 9 created a <26> pair in box 5 and r4c4 < > 2
R4c4 is empty …….. Is that echo Perry Como I can hear ? |
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TomC
Joined: 30 Oct 2020 Posts: 358 Location: Wales
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Posted: Wed Jan 05, 2022 7:20 pm Post subject: |
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Not sure, I'm thinking it maybe Paloma Faith's third album you're hearing |
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Mogulmeister
Joined: 03 May 2007 Posts: 1151
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Posted: Wed Jan 05, 2022 8:52 pm Post subject: |
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Perfectly!
Be a while before she plays Gibraltar again.
She jumped on the stage there and shouted out:
“Hello Spain!”. |
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