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Extreme VH 012619

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immpy

Joined: 06 May 2017
Posts: 574

Posted: Sat Jan 26, 2019 5:56 am Post subject: Extreme VH 012619

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

ZeroAssoluto

Joined: 05 Feb 2017
Posts: 1020
Location: Rimini, Italy

Posted: Sat Jan 26, 2019 10:41 am Post subject:

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

Ajò Dimonios

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

Posted: Sat Jan 26, 2019 6:22 pm Post subject:

Paolo
Hi everyone.

Code:

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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