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Puzzle 11/07/26: ~ XY (difficult!)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Jul 26, 2011 11:21 pm    Post subject: Puzzle 11/07/26: ~ XY (difficult!) Reply with quote
Code:
 +-----------------------+
 | 2 . . | 7 . . | . . . |
 | . . . | . . . | 2 . . |
 | . . 4 | . 2 . | 8 . 7 |
 |-------+-------+-------|
 | 4 . . | . 1 . | . . 9 |
 | . . 8 | 4 . 6 | 7 2 1 |
 | . . . | . 7 8 | 4 . . |
 |-------+-------+-------|
 | . 8 6 | . 4 1 | 9 7 2 |
 | . . . | . 3 . | 1 . . |
 | . . 1 | 8 6 . | 5 . 4 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Wed Jul 27, 2011 8:58 am    Post subject: Reply with quote
Somewhat "extreme" move, perhaps not entirely justified by the "difficult" label - but the pattern on 3s just asked for it and it was fun Smile
Quote:
(7)r4c3=(7-3)r2c3=r1c3 - (3)r1c7=x-wing(3)r12/c39 - (3=6)r6c9 - r4c7=r4c2 ; r4c2<>7
(Written as an AIC as the more natural Kraken was heavy on ALS)
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Jul 28, 2011 4:44 am    Post subject: Reply with quote
Five steps for me.

W-Wing (29)
AIC
DP (14-49-19)
Skyscraper (6)
BUG+3
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susume



Joined: 13 May 2011
Posts: 36
Location: Southeastern US
PostPosted: Fri Jul 29, 2011 3:34 am    Post subject: Reply with quote
Same target as Peter's, but a different pattern of 3s to get there:
(6)r4c2 = (6-3)r4c7 = r6c9 - r2c9 = (3-7)r2c3 =(7)r2c2; r4c2<>7
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Fri Jul 29, 2011 6:46 am    Post subject: Reply with quote
susume wrote:
Same target as Peter's, but a different pattern

Seems I made it overly complicated - again!
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