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May 14 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 884
Location: Rimini, Italy

PostPosted: Tue May 14, 2024 9:11 am    Post subject: May 14 VH Reply with quote

Hi everyone,

Code:

+---------------+--------+--------------+
| 2    78   9   | 3 4 17 | 18   6   5   |
| 367  3467 5   | 2 8 17 | 134  9   137 |
| 1    3478 34  | 6 5 9  | 348  378 2   |
+---------------+--------+--------------+
| 3567 9    2   | 8 1 56 | 35   37  4   |
| 4    35   13  | 7 9 2  | 1358 138 6   |
| 8    567  16  | 4 3 56 | 9    2   17  |
+---------------+--------+--------------+
| 35   2    8   | 1 7 4  | 6    35  9   |
| 356  3456 346 | 9 2 8  | 7    135 13  |
| 9    1    7   | 5 6 3  | 2    4   8   |
+---------------+--------+--------------+

Play this puzzle online at the Daily Sudoku site

Quote:

.
Skyscraper with number 7 in r2c1,r3c8 SL in r4c18 and -7 in r2c9,r3c2
or
Skyscraper with number 7 in r3c8,r6c9 SL in r36c2 and -7 in r2c9,r4c8
or
Skyscraper with number 7 in r3c2,r4c1 SL in r34c8 and -7 in r2c1,r6c2
or
Skyscraper with number 7 in r4c1,r6c9 SL in r2c19 and -7 in r4c8,r6c2
or
Simple Colors With number 7 (r2c1,r2c9,r3c2,r4c8,r6c2) / (r3c8,r4c1,r6c9) and -7 in r2c19,r36c2,r4c8
or
Finned X-Wing with number 7 r26c29 fr13c2 and -7 in r2c1


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 353
Location: Wales

PostPosted: Tue May 14, 2024 10:09 am    Post subject: Reply with quote

Thanks Gianni

But doesn't a XY wing solve this in one move? No fancy stuff!

I know draw/play says its not easy after this XY wing but it is!
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TomC



Joined: 30 Oct 2020
Posts: 353
Location: Wales

PostPosted: Tue May 14, 2024 10:23 am    Post subject: Reply with quote

For something a bit more fancy remove <1> from r5c8 to solve
Quote:
If r5c8=1, r5c3=3, r3c3=4, r8c3=6

Leads to a <35> UR in r78c17
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 884
Location: Rimini, Italy

PostPosted: Tue May 14, 2024 3:13 pm    Post subject: Reply with quote

Hi TomC

the xy-wing then required a naked pair and I preferred to focus only on the unique moves.


TomC wrote:
Thanks Gianni

But doesn't a XY wing solve this in one move? No fancy stuff!

I know draw/play says its not easy after this XY wing but it is!
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