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Puzzle 11/05/07: ~ XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat May 07, 2011 5:36 am    Post subject: Puzzle 11/05/07: ~ XY Reply with quote
Last puzzle from a file of difficult puzzles. I'll start preparing a new file of difficult puzzles soon.

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

Play this puzzle online at the Daily Sudoku site
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sat May 07, 2011 4:05 pm    Post subject: Reply with quote
Two steps...
Quote:
skyscraper(9) ; r5c9<>9
w-wing(12) (2=1)r5c9 - r2c9=r2c8 - (1=2)r8c8 ; r9c9<>2, r46c8<>2
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun May 08, 2011 3:44 pm    Post subject: Reply with quote
Same as Peter but I used an ER to zap the 9.
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