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Puzzle 11/01/21

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Jan 21, 2011 5:53 am    Post subject: Puzzle 11/01/21 Reply with quote
Code:
 +-----------------------+
 | . . . | . 2 . | 3 4 9 |
 | . 4 . | . 5 . | . . 6 |
 | . . 2 | 4 . . | . 5 . |
 |-------+-------+-------|
 | . . 8 | 5 . . | . 7 . |
 | 4 5 . | . . . | 8 . 3 |
 | . . . | . . . | . . 5 |
 |-------+-------+-------|
 | 8 . . | . 1 . | 5 . 2 |
 | 3 . 6 | 9 . . | . . . |
 | 7 1 . | . 8 3 | 9 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Fri Jan 21, 2011 9:27 am    Post subject: Reply with quote
After some nice basics - two steps with a loop...
Quote:
x-wing(3) r3, r4 ; r6c25<>3
xy-cycle ; (3=9)r5c5 - (9=7)r6c6 - (7=6)r6c2 - (6=3)r4c2 - loop ; r35c5<>9, r6c3<>7, r13c2<>6

You can work the essentially the same loop using als into a one stepper...
Quote:
anp(39=7)r46c5 - r6c2=(7-8)r1c2=(8-3)r3c2=r3c5 - loop ; r6c3<>7, r1c2<>6, r3c2<>6, r3c5<>9
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