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VH 070221

 
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Fri Jul 02, 2021 4:07 pm    Post subject: VH 070221 Reply with quote
Hello all. This one got rated Too Hard in Draw/Play, but can be solved using VH techniques. Enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Mon Jul 05, 2021 9:52 pm    Post subject: VH + 070221 Reply with quote
Code:

+------------------+-------------------+--------------------+
| 4     6      1   | 8       3     9   | 5       27      27 |
| 8     2      3   | 7       4     5   | 16      9       16 |
| 7     5      9   | 16      2     16  | 3       4       8  |
+------------------+-------------------+--------------------+
| 5     47     247 | 34      6    b348 |c289     1      d29 |
| 3     8      6   | 9       1     2   | 7       5       4  |
| 9     1      2-4 | 5       7    a48  | 268     26      3  |
+------------------+-------------------+--------------------+
| 6     47     8   | 134     9     134 | 12      237     5  |
| 1     3     f47  | 2       5     6-4 | 69      8      e79 |
| 2     9      5   | 136     8     7   | 4       36      16 |
+------------------+-------------------+--------------------+

(4=8)r6c6 – r4c6 = (8-9)r4c7 = r4c9 – (9=7)r8c9 – (7=4)r8c3 => - 4r8c6,r6c3 ; stte
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dongrave



Joined: 06 Mar 2014
Posts: 568
PostPosted: Tue Jul 06, 2021 1:54 pm    Post subject: Reply with quote
Since immpy said that it was a VH puzzle, I used the 4 X-Wing in rows 6 and 8 which then opened up a 29-7 XY-Wing which solved it.
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Tue Jul 06, 2021 5:14 pm    Post subject: Reply with quote
Yes indeed it was dongrave, and those were the moves. Nicely done.

cheers...immp
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