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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
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 Posted: Fri Jun 25, 2021 7:53 am Post subject: Jun 25 VH |
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Hi everyone,
| Code: |
+-----------+---------------+-------------+
| 27 4 89 | 28 5 789 | 136 16 136 |
| 1 78 6 | 48 47 3 | 5 2 9 |
| 3 29 5 | 12 126 69 | 8 4 7 |
+-----------+---------------+-------------+
| 24 12 34 | 6 8 5 | 9 7 134 |
| 8 19 349 | 234 2347 47 | 1236 16 5 |
| 6 5 7 | 9 234 1 | 23 8 34 |
+-----------+---------------+-------------+
| 5 6 2 | 1348 134 48 | 7 9 18 |
| 9 3 18 | 7 16 68 | 4 5 2 |
| 47 78 148 | 5 9 2 | 16 3 168 |
+-----------+---------------+-------------+
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Play this puzzle online at the Daily Sudoku site
| Quote: | XY-Wing 2,8,9 in r1c34,r3c2 and -2 in r1c1,r3c45
or
XY-Wing 2,7,8 in r1c14.r2c2 and -8 in r1c3,r2c4 |
Ciao Gianni |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Fri Jun 25, 2021 12:48 pm Post subject: |
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| Quote: | Using Gianni's grid I am going to be a bit like Tom here.
If you look at r1c3 and r1c4 which are next to each other.
If r1c3 is 8 then there is no 8 in r1c4.
if r1c3 is not 8 then that removes the 2in r1c1 which means no 8 in r1c4 either.
Either candidate removes 8 so r1c4<> 8 stte.
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TomC
Joined: 30 Oct 2020
Posts: 358
Location: Wales
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| Posted: Fri Jun 25, 2021 1:37 pm Post subject: |
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Thanks Mogulmeister, I would have described it as
r1c4 <> 8 as then r1c3 = 9, r3c2 = 2 and then no two's in box 2 |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Fri Jun 25, 2021 7:15 pm Post subject: |
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Love the analogies. For me, the XY-Wings do the trick. Easier for me to see.
cheers...immp |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Fri Jun 25, 2021 7:19 pm Post subject: |
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| Actually it was the 27-8 XY-Wing that did it in my case. |
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