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Dec 29 DB

 
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
PostPosted: Sat Dec 29, 2007 3:53 pm    Post subject: Dec 29 DB Reply with quote
The Dec 29 DB takes only one xy-wing.
A year end gift from DB.


Earl

Code:

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

Play this puzzle online at the Daily Sudoku site
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TKiel



Joined: 22 Feb 2006
Posts: 292
Location: Kalamazoo, MI
PostPosted: Sat Dec 29, 2007 4:20 pm    Post subject: Reply with quote
Quote:
...takes only one xy-wing.


Or a W-wing.

Or a UR.

Or a different W-wing.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Dec 29, 2007 6:20 pm    Post subject: Reply with quote
I didn't notice an XY-Wing, but one W-Wing did it, following an XYZ-Wing which turned out to be unnecessary.
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