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Daily Diabolical 11/12/2020

 
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peter urhegyi



Joined: 26 Oct 2020
Posts: 28
PostPosted: Thu Dec 10, 2020 11:33 pm    Post subject: Daily Diabolical 11/12/2020 Reply with quote
I had a lot of fun to solve this and hope to see other nice solutions. Mine has four steps and needed a wxyz-wing.
Code:

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

Play this puzzle online at the Daily Sudoku site
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dongrave



Joined: 06 Mar 2014
Posts: 568
PostPosted: Fri Dec 11, 2020 1:23 pm    Post subject: Reply with quote
Good one Peter! After basics:

Code:
+--------------+------------------+----------------+
| 8   247  127 | 3      146 9     | 56   267 2567  |
| 147 479  5   | 146    2   14    | 8    367 3679  |
| 29  6    3   | 57     8   57    | 1    4   29    |
+--------------+------------------+----------------+
| 17  5    6   | 1247   14  12478 | 3    9   248   |
| 137 2379 127 | 124679 146 12478 | 56   268 24568 |
| 29  8    4   | 269    5   3     | 7    1   26    |
+--------------+------------------+----------------+
| 67  1    8   | 24     3   24    | 9    5   67    |
| 346 34   9   | 15     7   15    | 2    368 368   |
| 5   237  27  | 8      9   6     | 4    37  1     |
+--------------+------------------+----------------+

6r6c9 = r6c4 - (6=1|4)r2c46 - (14=7)r2c1 - (7=6)r7c1 => r7c9 <> 6; stte.
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Fri Dec 11, 2020 4:44 pm    Post subject: Reply with quote
Thanks for the puzzle peter. I used numerous Hidden Rectangles, X-Wings (regular and finned), and an Empty Rectangle.

cheers...immp
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Sun Dec 13, 2020 4:55 pm    Post subject: Daily Diabolical 11/12/2020 Reply with quote
Code:

+------------------+----------------------+-------------------+
| 8     247    127 | 3        146   9     | 56   267    2567  |
|e147   479    5   |d146      2    d14    | 8    367    3679  |
| 29    6      3   | 57       8     57    | 1    4      29    |
+------------------+----------------------+-------------------+
| 17    5      6   | 1247     14    12478 | 3    9      248   |
| 137   2379   127 | 124679   146   12478 | 56   268    24568 |
| 29    8      4   |c269      5     3     | 7    1     b26    |
+------------------+----------------------+-------------------+
| 67    1      8   | 24       3     24    | 9    5     a67    |
|f346  f34     9   | 15       7     15    | 2    368    368   |
| 5    f237   f27  | 8        9     6     | 4    3-7    1     |
+------------------+----------------------+-------------------+

(7=6)r7c9 - r6c9 = r6c4 - (6=1|4)r2c64 - (4)r2c1 = (432|7)b7p4589 => - 7r9c8; stte
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