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Puzzle 11/05/11: ~ Advanced (BBDB?)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed May 11, 2011 2:32 pm    Post subject: Puzzle 11/05/11: ~ Advanced (BBDB?) Reply with quote
Code:
 +-----------------------+
 | . . 8 | 7 . 4 | . 2 6 |
 | . . . | . . 3 | . . . |
 | 6 . . | 8 2 9 | 3 . 1 |
 |-------+-------+-------|
 | 1 . 9 | 6 . . | . 3 . |
 | . . 5 | . 3 . | . . . |
 | 4 3 2 | . . 1 | . 6 5 |
 |-------+-------+-------|
 | . . 3 | . . . | 6 . . |
 | 8 . . | 3 . 6 | . 4 . |
 | 2 . 6 | . . 8 | . . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Fri May 13, 2011 7:26 am    Post subject: Reply with quote
a straight up approach

http://youtu.be/6RZikVPi3zo
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Fri May 13, 2011 8:37 am    Post subject: Reply with quote
Two steps...
Quote:
xy-wing(17-5) r2c2 ; r2c1<>5
xy-chain (1=7)r2c3 - (7=4)r2c9 - (4=8)r2c7 - (8=1)r5c7 - (1=5)r9c7 - (5=1)r9c4 ; r2c4<>1
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat May 14, 2011 12:36 am    Post subject: Reply with quote
Four steps for me.

Skyscraper (5)
W-Wing (59)
Type 2 UR (89)
XY-Chain, four-cell
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