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Nov 21 DB

 
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
PostPosted: Sat Nov 21, 2009 2:27 pm    Post subject: Nov 21 DB Reply with quote
The Nov 21 DB

Solution: I used an xy-chain to eliminate the <1> in R4C1, but Ted has a neater solution below.

Earl

Code:

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

Play this puzzle online at the Daily Sudoku site

Last edited by Earl on Sat Nov 21, 2009 4:02 pm; edited 5 times in total
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sat Nov 21, 2009 3:12 pm    Post subject: Reply with quote
One solution is:
Quote:
w-wing 12 in r1c1 & r7c6 with strong link on 1 in row4.

Ted
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