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Puzzle VH_029

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue May 26, 2009 3:52 pm    Post subject: Puzzle VH_029 Reply with quote
Code:
 +-----------------------+
 | . 8 1 | 3 9 7 | . . 6 |
 | 6 7 . | . . . | . . . |
 | 3 . 9 | . . . | . . . |
 |-------+-------+-------|
 | 2 . . | 7 . 3 | . . . |
 | 8 . . | . 4 6 | 1 . . |
 | 7 . . | 9 8 2 | . 4 3 |
 |-------+-------+-------|
 | . . . | . 2 . | 6 . . |
 | . . . | . . 1 | . . 8 |
 | 1 . . | . . 9 | . 3 . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
 r1  b3  Locked Candidate 2              <> 2    [r23c9]

   c18   X-Wing                          <> 5    [r8c23]

         XY-Wing  [r2c3]/[r3c2]+[r4c3]   <> 5    [r4c2]   complementary
         XY-Wing  [r3c2]/[r2c3]+[r4c2]   <> 4    [r4c3]   only one needed

         XY-Wing  [r7c9]/[r5c9]+[r9c7]   <> 2    [r9c9]

 r9  b9  Locked Candidate 1              <> 4    [r9c34]

         BUG+1                           =  2    [r9c2]
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