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May 08 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
PostPosted: Sat May 08, 2021 9:49 am    Post subject: May 08 VH Reply with quote
Hi everyone,

Code:

+-----------+----------+----------+
| 29 36  1  | 7   4 5  | 36 8  29 |
| 4  8   5  | 6   3 29 | 7  1  29 |
| 7  236 39 | 29  8 1  | 36 4  5  |
+-----------+----------+----------+
| 3  1   7  | 5   9 4  | 2  6  8  |
| 5  4   2  | 8   6 7  | 9  3  1  |
| 6  9   8  | 1   2 3  | 4  5  7  |
+-----------+----------+----------+
| 1  23  4  | 239 5 29 | 8  7  6  |
| 29 5   6  | 4   7 8  | 1  29 3  |
| 8  7   39 | 23  1 6  | 5  29 4  |
+-----------+----------+----------+

Play this puzzle online at the Daily Sudoku site

Quote:
Remote Pairs 2,9 in r7c6,r2c6,r2c9,r1c9,r1c1,r8c1,r8c8,r8c9 and -2 in r7c2,r9c4
or
W-Wing 2,9 in r3c4,r7c6 SL with number 2 in r37c2 and -9 in r2c6,r7c4
or
W-Wing 2,3 in r7c2,r9c4 SL with number 2 in r3c24 and -3 in r7c4,r9c3
or
W-Wing 2,9 in r3c4,r9c8 SL with number 9 in r39c3 and -2 in r9c4
or
XY-Wing 2,3,9 in r3c4,r9c34 and -9 in r3c3
or
XY-Wing 2,3,9 in r3c34,r9c4 and -3 in r9c3
or
Skyscraper with number 2 in r37c2,r27c6 and -2 in r3c4
or
2 String Kite with number 2 in r3c24,r27c6 and -2 in r7c2
or
UR 3,6 in r13c27 and r3c2=2


Ciao Gianni
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Sat May 08, 2021 5:12 pm    Post subject: Reply with quote
Great VH! Lots of ways to solve. I used a Finned X-Wing (2). There are actually two of them. r37c24 with fins at either r7c6 or r9c4. Depending on which way you use the fin, either r7c6<>2, or r9c4<>2. Actually both of these statements end up being true.
There is also a BUG+2 present in the puzzle in cells r3c2, and r7c4. It would be nice if Keith were to weigh in with the proper assessment of this; but I think that 3 cannot be eliminated from r3c2 AND/OR 2 cannot be eliminated from r7c4 or the puzzle will have multiple solutions.

cheers...immp
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Sat May 08, 2021 5:19 pm    Post subject: Reply with quote
Looking again the BUG+2 statement is OR only. If BOTH of the statements were true, r7c2 would have NO VALUE, a contradiction. Hope I am making sense of this.

cheers...immp
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