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Puzzle VH_044

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Jun 19, 2009 3:42 pm    Post subject: Puzzle VH_044 Reply with quote
Code:
 +-----------------------+
 | 3 9 . | 1 2 . | 6 4 . |
 | 6 1 . | . 7 . | 3 . . |
 | . . 5 | . 6 . | . 9 . |
 |-------+-------+-------|
 | 4 . . | 9 . . | . . . |
 | 5 3 1 | . . 7 | . . . |
 | . . . | . 1 5 | . . . |
 |-------+-------+-------|
 | 1 6 . | . . . | 9 . . |
 | 9 . 3 | . . . | . 8 . |
 | . . . | . . . | . . 3 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
   c3b7  Locked Pair                     <> 28   [r8c2],[r9c12]
 r8      Naked  Pair                     <> 45   [r8c47]
 r5  b5  Locked Candidate 1              <> 4    [r5c7]

 r58     X-Wing                          <> 2    [r79c4],[r469c7]

         XY-Wing  [r4c6]/[r3c6]+[r5c4]   <> 4    [r3c4]
         XY-Wing  [r5c4]/[r3c4]+[r4c6]   <> 3    [r3c6]

         XY-Wing  [r7c4]/[r7c8]+[r8c5]   <> 5    [r7c5]


Last edited by daj95376 on Fri Jun 26, 2009 8:33 pm; edited 1 time in total
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gindaani



Joined: 06 Mar 2009
Posts: 79
PostPosted: Fri Jun 19, 2009 8:38 pm    Post subject: Reply with quote
After the basics, I had:
Code:

+-----------+----------------+---------------+
| 3  9   7  | 1     2    8   | 6     4   5   |
| 6  1   4  | 5     7    9   | 3     2   8   |
| 28 28  5  | 34    6    34  | 17    9   17  |
+-----------+----------------+---------------+
| 4  278 6  | 9     38   23  | 12578 157 127 |
| 5  3   1  | 248   48   7   | 28    6   9   |
| 28 278 9  | 6     1    5   | 2478  3   247 |
+-----------+----------------+---------------+
| 1  6   28 | 23478 3458 234 | 9     57  247 |
| 9  45  3  | 27    45   1   | 27    8   6   |
| 7  45  28 | 248   9    6   | 1245  15  3   |
+-----------+----------------+---------------+

Play this puzzle online at the Daily Sudoku site

I found a 3-stepper:
Quote:
x-wing (2)
234 xy-wing
Chain r8c5<>4

Or a 6 stepper using uniqueness tests:
Quote:
x-wing (2)
234 xy-wing
Type 1 UR
28 w-wing
Type 1 UR
BUB+1
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