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Aug 11 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 643
Location: Rimini, Italy

PostPosted: Wed Aug 11, 2021 8:46 am    Post subject: Aug 11 VH Reply with quote

Hi everyone,

Code:

+-----------+-----------+---------+
| 8  24  9  | 6  3   24 | 1  7 5  |
| 24 3   7  | 1  5   9  | 24 6 8  |
| 6  5   1  | 7  8   24 | 24 3 9  |
+-----------+-----------+---------+
| 5  12  23 | 34 7   8  | 6  9 14 |
| 7  9   8  | 2  14  6  | 3  5 14 |
| 14 146 36 | 5  9   13 | 7  8 2  |
+-----------+-----------+---------+
| 9  16  5  | 34 146 13 | 8  2 7  |
| 12 7   26 | 8  16  5  | 9  4 3  |
| 3  8   4  | 9  2   7  | 5  1 6  |
+-----------+-----------+---------+

Play this puzzle online at the Daily Sudoku site

Quote:
W-Wing 1,2 in r4c2,r8c1 SL with number 2 in r48c3 and -1 in r6c1,r7c2
or
XY-Wing
1,2,4 in r14c2,r6c1 and -4 in r2c1,r6c2
1,2,4 in r26c1,r4c2 and -2 in r1c2
1,2,6 in r47c2,r8c3 and -2 in r4c3
or
XYZ-Wing 1,4,6 in r6c12,r7c2 and -1 in r4c2
or
Skyscraper with number 1 in r68c1, r67c6 and -1 in r7c2,r8c5
or
2 String Kite with number 1 in r67c6,r8c15 and -1 in r6c1


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 146
Location: Wales

PostPosted: Wed Aug 11, 2021 1:39 pm    Post subject: Reply with quote

Or you could have r8c3 <> 6
as then r7c2=1 r4c2=2 r4c3=3 gives r6c3 also 6
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TomC



Joined: 30 Oct 2020
Posts: 146
Location: Wales

PostPosted: Wed Aug 11, 2021 2:15 pm    Post subject: Reply with quote

r6c2<>6 using the same logic

I suppose you could also say that whatever the contents of r7c2 (1 or 6) r6c3 is always 6
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Mogulmeister



Joined: 03 May 2007
Posts: 970

PostPosted: Wed Aug 11, 2021 3:12 pm    Post subject: Reply with quote

Exactly.

Plug 1 into r7c2 and if you follow the 1s in the loop below it removes itself from r7c2 meaning it must be 6.

(1)r7c2-r4c2=r4c9-r5c9=r5c5-r6c6=r7c6-(1)r7c2

so r7c2 and r6c3 must be 6 and r6c2, r8c3<>6
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