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VH December 20th

 
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Mogulmeister



Joined: 03 May 2007
Posts: 1136

PostPosted: Mon Dec 20, 2021 9:42 am    Post subject: VH December 20th Reply with quote

Code:

+-------+-------+-------+
| 3 . . | . . 9 | . . . |
| 8 1 . | . 3 5 | . . . |
| 9 . 5 | . 8 . | . 1 . |
+-------+-------+-------+
| 4 9 . | . . 2 | . . . |
| 6 . . | . . . | . . 5 |
| . . . | 6 . . | . 9 3 |
+-------+-------+-------+
| . 4 . | . 9 . | 1 . 8 |
| . . . | 5 2 . | . 3 9 |
| . . . | 7 . . | . . 2 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site
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Mogulmeister



Joined: 03 May 2007
Posts: 1136

PostPosted: Mon Dec 20, 2021 9:51 am    Post subject: Reply with quote

Code:
+--------------+--------------+--------------+
| 3   2   4    | 1   6   9    | 58  58  7    |
| 8   1   7    | 4   3   5    | 9   2   6    |
| 9   6   5    | 2   8   7    | 3   1   4    |
+--------------+--------------+--------------+
| 4   9   3    | 8   5   2    | 67  67  1    |
| 6   7   18   | 9   14  3    | 2   48  5    |
| 2   5   18   | 6   7   14   | 48  9   3    |
+--------------+--------------+--------------+
| 57  4   2    | 3   9   6    | 1   57  8    |
| 17  8   6    | 5   2   14   | 47  3   9    |
| 15  3   9    | 7   14  8    | 456 456 2    |
+--------------+--------------+--------------+


Quote:
There's a good old XY chain with pincers for 5 at r7c8 and r1c7 so r1c8, r9c7 < > 5
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TomC



Joined: 30 Oct 2020
Posts: 227
Location: Wales

PostPosted: Mon Dec 20, 2021 1:22 pm    Post subject: Reply with quote

Or this could be pincers on 8 in r6c7 and r1c8 so r5c8 <> 8
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Earl



Joined: 30 May 2007
Posts: 668
Location: Victoria, KS

PostPosted: Mon Dec 20, 2021 2:27 pm    Post subject: Dec 20 VH Reply with quote

567xywing@R9C7, -7R4C8

0r a bug +1 in box 9, R9C8=5

Early Earl
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dongrave



Joined: 06 Mar 2014
Posts: 476

PostPosted: Mon Dec 20, 2021 3:28 pm    Post subject: Reply with quote

Earl, Don't you have to apply the X-Wing on 4's in cols 5 and 8 before the 56-7 XY-Wing opens up? Thanks, Don.
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Mogulmeister



Joined: 03 May 2007
Posts: 1136

PostPosted: Mon Dec 20, 2021 3:40 pm    Post subject: Reply with quote

TomC wrote:
Or this could be pincers on 8 in r6c7 and r1c8 so r5c8 <> 8


...and don't forget this chain also means r1c7 <> 8 (which changes absolutely nothing).
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