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Puzzle 10/08/07: B

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Aug 07, 2010 4:39 pm    Post subject: Puzzle 10/08/07: B Reply with quote
Code:
 +-----------------------+
 | 4 . . | 2 . 9 | . . . |
 | . . . | . 5 3 | . 6 9 |
 | . . 3 | 7 6 . | . . . |
 |-------+-------+-------|
 | 7 . 4 | 5 9 1 | . 8 . |
 | . 6 8 | 4 . 7 | . . . |
 | 9 1 . | 8 3 . | . . . |
 |-------+-------+-------|
 | . . . | . . . | 6 . . |
 | . 4 . | 6 . . | . 2 . |
 | . 7 . | . . . | . . 1 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Rating wrote:
XY
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sun Aug 08, 2010 8:33 pm    Post subject: Reply with quote
An xy-chain
Quote:
xy-chain (2=3)r4c2 - (3=2)r4c7 - (2=8)r3c7 - (8=5)r9c7 - (5=2)r9c3 ; r6c3<>2, r7c2<>2
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Mon Aug 09, 2010 10:22 pm    Post subject: Reply with quote
Type 1 UR (39)
Type 4 UR (47)
XY-Wing (582), flightless with pincer transport
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