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Extreme VH 012619

 
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immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Sat Jan 26, 2019 5:56 am    Post subject: Extreme VH 012619 Reply with quote

Only VH techniques are necessary; Finned X-Wings are also possible.
Enjoy the puzzle...

Code:

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

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: Sat Jan 26, 2019 10:41 am    Post subject: Reply with quote

Hi everyone,

Code:

+--------------+-------------+----------------+
| 56  13  56   | 2    17 4   | 8     37  9    |
| 17  9   4    | 1357 8  357 | 157   2   6    |
| 8   123 127  | 157  9  6   | 157   4   1357 |
+--------------+-------------+----------------+
| 17  6   137  | 37   2  9   | 4     5   8    |
| 29  4   237  | 8    5  1   | 2679  367 237  |
| 259 8   2357 | 6    4  37  | 279   1   237  |
+--------------+-------------+----------------+
| 26  5   126  | 9    3  27  | 127   8   4    |
| 4   7   8    | 15   6  25  | 3     9   12   |
| 3   12  9    | 4    17 8   | 12567 67  1257 |
+--------------+-------------+----------------+

Play this puzzle online at the Daily Sudoku site

XY-Wing 1,2,7 in r7c6,r9c25 and -2 in r7c13

Code:

+----------+-----------+---------------+
| 5  13 6  | 2   17 4  | 8    37  9    |
| 7  9  4  | 135 8  35 | 15   2   6    |
| 8  13 2  | 157 9  6  | 157  4   1357 |
+----------+-----------+---------------+
| 1  6  37 | 37  2  9  | 4    5   8    |
| 29 4  37 | 8   5  1  | 2679 367 237  |
| 29 8  5  | 6   4  37 | 279  1   237  |
+----------+-----------+---------------+
| 6  5  1  | 9   3  27 | 27   8   4    |
| 4  7  8  | 15  6  25 | 3    9   12   |
| 3  2  9  | 4   17 8  | 1567 67  157  |
+----------+-----------+---------------+

Play this puzzle online at the Daily Sudoku site

UR 2,9 in r56c17 and -2 in r56c7

Ciao Gianni
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Sat Jan 26, 2019 6:22 pm    Post subject: Reply with quote

Paolo
Hi everyone.
Code:

+--------------+-------------+----------------+
| 56  13  56   | 2    17 4   | 8     37  9    |
| 17  9   4    | 1357 8  357 | 157   2   6    |
| 8   123 127  | 157  9  6   | 157   4   1357 |
+--------------+-------------+----------------+
| 17  6   137  | 37   2  9   | 4     5   8    |
| 29  4   237  | 8    5  1   | 2679  367 237  |
| 259 8   2357 | 6    4  37  | 279   1   237  |
+--------------+-------------+----------------+
| 26  5   126  | 9    3  27  | 127   8   4    |
| 4   7   8    | 15   6  25  | 3     9   12   |
| 3   12  9    | 4    17 8   | 12567 67  1257 |
+--------------+-------------+----------------+

Play this puzzle online at the Daily Sudoku site
One step after basics
If R1C5=1=>contradiction =>-1R1C5=>solution.
(1-7)R1C5=(7-3)R1C8=3R3C9-3R56C9;1R1C5-1R9C5=(1-5)R8C4=(5-2)R8C6=2R8C9-2R56C9=7R56C9 => two 7 in box 6=>-1R1C5=>stte
Ciao a Tutti
Paolo
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