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VH 123021

 
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immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Thu Dec 30, 2021 6:37 pm    Post subject: VH 123021 Reply with quote

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 . . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 868
Location: Rimini, Italy

PostPosted: Thu Dec 30, 2021 8:16 pm    Post subject: Reply with quote

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   |
+-----------+-------------+-------------+

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: 349
Location: Wales

PostPosted: Fri Dec 31, 2021 7:34 pm    Post subject: Reply with quote

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

PostPosted: Tue Jan 04, 2022 10:15 pm    Post subject: Reply with quote

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: 349
Location: Wales

PostPosted: Wed Jan 05, 2022 11:56 am    Post subject: Reply with quote

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

PostPosted: Wed Jan 05, 2022 3:24 pm    Post subject: Reply with quote

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

PostPosted: Wed Jan 05, 2022 4:43 pm    Post subject: Reply with quote

….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: 349
Location: Wales

PostPosted: Wed Jan 05, 2022 7:20 pm    Post subject: Reply with quote

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

PostPosted: Wed Jan 05, 2022 8:52 pm    Post subject: Reply with quote

Perfectly!

Be a while before she plays Gibraltar again.
She jumped on the stage there and shouted out:
“Hello Spain!”.
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