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Oct 10 db

 
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
PostPosted: Sat Oct 10, 2009 2:15 pm    Post subject: Oct 10 db Reply with quote
The October 10 DB has an obvious skyscraper (5), but it is unnecessary. The old reliable does it again in one step.

A Solution: 578 xy-wing

Earl


Code:

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

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 Oct 10, 2009 5:33 pm    Post subject: Reply with quote
I noticed the wing long before I was done with basics.
Quote:
It takes out 8 in B1C1.
All singles from there. There was also a UR that I didn't look at too closely.

Keith
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