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Jan 26 DB

 
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
PostPosted: Sat Jan 26, 2008 1:52 pm    Post subject: Jan 26 DB Reply with quote
Here is the Jan 26 DB.

Same as last three DB's - a skyscraper (1) does it.

Earl

Code:

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

Play this puzzle online at the Daily Sudoku site
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Sat Jan 26, 2008 6:52 pm    Post subject: Reply with quote
Two successive XY-wings in C89 that solve C8, and the puzzle.

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Jan 26, 2008 7:33 pm    Post subject: Reply with quote
One long coloring chain (it was either six or eight cells) on -1- did it for me.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sun Jan 27, 2008 12:33 am    Post subject: Reply with quote
Marty,

I see it too, so the 1 in r1c9, r3c4, r2c2, r7c6, r9c1 are all toast.
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