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VH+ 022622

 
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immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Sat Feb 26, 2022 6:26 pm    Post subject: VH+ 022622 Reply with quote

Hello all, enjoy the puzzle.

Code:

+-------+-------+-------+
| . . . | . . . | . 5 . |
| 3 . . | 9 7 . | . . 1 |
| 5 . . | 2 . . | 3 . . |
+-------+-------+-------+
| . . . | . 6 . | . . . |
| . 3 . | . 5 2 | . 1 . |
| . . 2 | . . . | 4 6 . |
+-------+-------+-------+
| 9 . 3 | 4 . . | . . . |
| . 8 . | . 9 . | . . . |
| 7 . 5 | . . . | 6 2 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp
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Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Sun Feb 27, 2022 11:26 am    Post subject: Reply with quote

Nice puzzle Immp!

Code:

+------------+--------------+-------------+
| 4  129 89  | 6    138 138 | 278  5  278 |
| 3  26  68  | 9    7   5   | 28   4  1   |
| 5  17  178 | 2    4   18  | 3    9  6   |
+------------+--------------+-------------+
| 18 579 79  | 1378 6   4   | 25   78 235 |
| 6  3   4   | 78   5   2   | 9    1  78  |
| 18 57  2   | 1378 138 9   | 4    6  35  |
+------------+--------------+-------------+
| 9  16  3   | 4    2   67  | 1578 78 578 |
| 2  8   16  | 5    9   67  | 17   3  4   |
| 7  4   5   | 138  138 138 | 6    2  9   |
+------------+--------------+-------------+

Play this puzzle online at the Daily Sudoku site


If you say r4c7 is 2 then r2c7 = 8 and r2c3 = 6 and r8c3 = 1 and r8c7 = 7

If this were true there would be no digits left in <278> r1c7.

Therefore r4c7 < > 2
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Clement



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Thu Mar 03, 2022 6:46 pm    Post subject: Reply with quote

[quote="Mogulmeister"]Nice puzzle Immp!

[code]


If you say r4c7 is 2 then r2c7 = 8 and r2c3 = 6 and r8c3 = 1 and r8c7 = 7

If this were true there would be no digits left in <278> r1c7.

Therefore r4c7 <2> - 2r4c7; stte
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Clement



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Thu Mar 03, 2022 6:54 pm    Post subject: Reply with quote

[quote="Clement"]
Mogulmeister wrote:
Nice puzzle Immp!

[code]


If you say r4c7 is 2 then r2c7 = 8 and r2c3 = 6 and r8c3 = 1 and r8c7 = 7

If this were true there would be no digits left in <278> r1c7.

Therefore r4c7 <2> - 2r4c7; stte
Soory for that submission above, it is not that I intended. There is a probably a problem with the server or with my computer
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Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Fri Mar 04, 2022 1:35 pm    Post subject: Reply with quote

No probs Clement. I needed to add that this solved the puzzle.
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dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Fri Mar 04, 2022 3:36 pm    Post subject: Reply with quote

Code:
+--------------+----------------+---------------+
| 4   129  89  | 6     138  138 | 278   5   278 |
| 3   26   68  | 9     7    5   | 28    4   1   |
| 5   17   178 | 2     4    18  | 3     9   6   |
+--------------+----------------+---------------+
| 18  579  79  | 1378  6    4   | 25   b78  235 |
| 6   3    4   |d78    5    2   | 9     1  c78  |
| 18 f57   2   |e1378  138  9   | 4     6  g35  |
+--------------+----------------+---------------+
| 9   16   3   | 4     2    67  | 1578 a78 h578 |
| 2   8    16  | 5     9    67  | 1-7   3   4   |
| 7   4    5   | 138   138  138 | 6     2   9   |
+--------------+----------------+---------------+

I used the chain: 7r7c8=r4c8-(7=8*)r5c9-(8=7)r5c4-r6c4=(7-5)r6c2=r6c9-(58*=7)r7c9 => r8c7 <> 7; stte.
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Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Fri Mar 04, 2022 8:00 pm    Post subject: Reply with quote

Nice one Dongrave - it gave me a thought using your grid

There’s an ANP <578> at (a) and (h)

If true (5=78)r7c89 and r8c7 < > 7
If false (78=5)r7c89 then follow your chain in reverse (g to b) and r8c7 < > 7
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Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Sat Mar 05, 2022 5:56 pm    Post subject: Reply with quote

A further refinement and c,d and e from the original grid can be replaced

(78=5)r7c89-r6c9=r6c2-(5=79)r4c23-(7)r4c8=r7c8-r8c7 :stte


Last edited by Mogulmeister on Sat Mar 05, 2022 10:54 pm; edited 1 time in total
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Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Sat Mar 05, 2022 6:40 pm    Post subject: Reply with quote

Relabel

Code:
+--------------+----------------+---------------+
| 4   129  89  | 6     138  138 | 278   5   278 |
| 3   26   68  | 9     7    5   | 28    4   1   |
| 5   17   178 | 2     4    18  | 3     9   6   |
+--------------+----------------+---------------+
| 18  d579 d79 | 1378  6    4   | 25   e78  235 |
| 6   3    4   | 78    5    2   | 9     1   78  |
| 18  c57  2   | 1378  138  9   | 4     6  b35  |
+--------------+----------------+---------------+
| 9   16   3   | 4     2    67  | 1578 f78 a578 |
| 2   8    16  | 5     9    67  | 1-7   3   4   |
| 7   4    5   | 138   138  138 | 6     2   9   |
+--------------+----------------+---------------+
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