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Puzzle 11/07/04: ~ XY (BBDB?)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Jul 04, 2011 6:38 pm    Post subject: Puzzle 11/07/04: ~ XY (BBDB?) Reply with quote
Code:
 +-----------------------+
 | . . 8 | 3 . . | . . . |
 | . 3 . | . . . | 8 1 5 |
 | 2 . . | 6 . 8 | . . 3 |
 |-------+-------+-------|
 | 4 . 2 | . . 3 | . 8 1 |
 | . . . | . 6 . | . . . |
 | . . 7 | 8 . 1 | 4 . . |
 |-------+-------+-------|
 | . 2 . | . . 7 | . 4 8 |
 | . 7 . | 1 . . | 2 5 . |
 | . 4 5 | 2 . . | 1 . . |
 +-----------------------+

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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Mon Jul 04, 2011 10:03 pm    Post subject: Reply with quote
Three moves.. starting with a UR
Quote:
ur(15)r13c25[(9)r1c25=(7)r1c5] - (7=249)r2c456 ; r1c6<>9
xy-chain ; (3=5)r6c1 - (5=2)r6c5 - (2=6)r6c9 - (6=9)r8c9 - (9=3)r8c3 ; r5c3<>3, r89c1<>3
w-wing(9-6) ; (6=9)r8c9 - r8c1=r9c1 - (9=6)r9c6 ; r8c6<>6, r9c89<>6
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Jul 04, 2011 10:10 pm    Post subject: Reply with quote
Peter: that's one impressive set of UR+ALS logic !!!
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Jul 05, 2011 2:40 pm    Post subject: Reply with quote
My first step was similar to Peter's but approached from a different POV.

Quote:
type 4 UR(15)r13c25; r1c25<>5
Plus aur(15)[(9)r1c25=(7)r1c5*]-(1)r1c5=r3c5-(1=5)r3c2-(57*=9)r1c1; r1c6<>9=5

anp(59=3)r7c45-(3=9)r7c7-(9=6)r8c9-r9c89=(6-9)r9c6; r9c6<>9=6

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Jul 06, 2011 4:50 am    Post subject: Reply with quote
XYZ-Wing (159); r1c1<>5
W-Wing (69), SL9 in r7; r8c6, r9c89<>6
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Wed Jul 06, 2011 7:43 am    Post subject: Reply with quote
Marty, great solution! You sure spot those w-wings with grouped links!
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Jul 06, 2011 3:44 pm    Post subject: Reply with quote
Thanks Peter. Even a blind pig finds an acorn once in a while. Very Happy
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