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May 11 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 863
Location: Rimini, Italy

PostPosted: Thu May 11, 2023 9:28 am    Post subject: May 11 VH Reply with quote

Hi everyone,

Code:

+-----------+-----------+-------------+
| 3   156 4 | 9  7   2  | 156 16  8   |
| 56  156 2 | 8  345 35 | 9   7   146 |
| 9   8   7 | 45 1   6  | 45  2   3   |
+-----------+-----------+-------------+
| 46  3   5 | 7  2   9  | 8   146 146 |
| 2   46  8 | 1  35  35 | 46  9   7   |
| 7   9   1 | 6  8   4  | 2   3   5   |
+-----------+-----------+-------------+
| 14  7   6 | 2  9   8  | 3   5   14  |
| 18  2   3 | 45 45  7  | 16  168 9   |
| 458 45  9 | 3  6   1  | 7   48  2   |
+-----------+-----------+-------------+

Play this puzzle online at the Daily Sudoku site

Quote:
Skyscraper with number 4 in r4c8,r5c2 SL in r9c28 and -4 in r4c1,r5c7
or
2 String Kite with number 4 in r4c8,r7c1 SL in r7c9,r9c8 and -4 in r4c1
or
2 String Kite with number 4 in r5c2,r9c8 SL in r4c8,r5c7 and -4 in r9c2
or
UR 3,5 in r25c56 and r2c5=4
or
Finned X-Wing with number 4 in r49c18 finned in r7c1 and -4 in r9c2


Ciao Gianni
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dongrave



Joined: 06 Mar 2014
Posts: 560

PostPosted: Thu May 11, 2023 1:37 pm    Post subject: Reply with quote

Or if you just use VH moves (i.e. X Wings, XY Wings, and XYZ Wings), the 16-4 XY Wing at r58c7,r7c9 (-4r4c9) opens up a 46-1 XY Wing at r4c19,r7c1 (-1r7c9) which solves it. There's also an X Wing on 6's in columns 1 and 9 but it doesn't solve it. (It looks like you'd still have to use the XY Wings that I mentioned in order to solve it.)
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