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Puzzle 11/02/05 single-stepper

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Feb 05, 2011 7:07 pm    Post subject: Puzzle 11/02/05 single-stepper Reply with quote
Code:
 +-----------------------+
 | 9 . . | . . . | . . . |
 | . 8 2 | . 3 . | 7 . . |
 | . 1 . | . 9 7 | 4 . 2 |
 |-------+-------+-------|
 | . . . | 3 . 2 | 5 . . |
 | . 2 9 | . 4 . | 8 1 . |
 | . . 7 | 8 . 9 | . . . |
 |-------+-------+-------|
 | . 5 8 | 9 7 . | 2 . . |
 | . . . | . 2 . | . . . |
 | . . 6 | . . . | . . . |
 +-----------------------+

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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Sat Feb 05, 2011 9:23 pm    Post subject: Reply with quote
A wing...
Quote:
m-wing(14) ; (4=1)r4c3 - r8c3=(1-4)r7c1=r2c1 ; r1c3<>4
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Feb 06, 2011 12:18 am    Post subject: Reply with quote
For those who are philosophically opposed to one-steppers (because they can't find them), I offer up a three:

XY-Wing (365), flightless
XY-Wing (685)
XY-Chain
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