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Puzzle VH 09/11/16

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Nov 17, 2009 6:27 am    Post subject: Puzzle VH 09/11/16 Reply with quote
I couldn't pass up this VH puzzle.

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

Play this puzzle online at the Daily Sudoku site
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Tue Nov 17, 2009 7:05 am    Post subject: Reply with quote
Good one! Smile
Quote:
x-wing 4
kite 7
w-wing 39
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Nov 17, 2009 1:27 pm    Post subject: Reply with quote
I used a
Quote:
Type 1 UR18,
UR78 with x-wing 8

Ted
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Nov 17, 2009 2:03 pm    Post subject: Reply with quote
Another solution is

xyz-wing 178 in r7c5
if r7c5=1: (1)r7c5 - (1=5)r7c3 - (5=7)r7c8 - (7)r7c2 = (7)r9c2; r9c6<>7
if r7c5=7: (7)r7c5 - (7)r9c6; r9c6<>7
if r7c5=8: (8)r7c5 - (8=7)r8c5; r9c6<>7

After cleanup, a type2 UR78 completes the puzzle

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Nov 18, 2009 12:18 am    Post subject: Reply with quote
Type 1 UR (18)
XY (375) with pincer transport
XY (473) with pincer transport
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oaxen



Joined: 10 Jul 2006
Posts: 96
PostPosted: Wed Nov 18, 2009 4:37 pm    Post subject: Reply with quote
a "9" in r5c3 makes it a one stepper
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Nov 18, 2009 5:11 pm    Post subject: Reply with quote
Hmmm!

Code:
1) X-Wing and 2x XY-Wing   -or-
2) X-Wing and 2x UR Type 1
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