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Set T_03 Puzzle 30

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Apr 06, 2009 3:21 pm    Post subject: Set T_03 Puzzle 30 Reply with quote
VH+ w/few steps

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

Play this puzzle online at the Daily Sudoku site

Code:
   c8    Naked  Pair                     <> 37   [r249c8]
 r8      Naked  Pair                     <> 38   [r8c69]
     b9  Naked  Pair                     <> 14   [r9c9]
 r4  b6  Locked Candidate 1              <> 4    [r4c45]
   c9b9  Locked Candidate 1              <> 9    [r46c9]

     b6  Naked  Quad                     <> 3789 [r4c9]   -or-
   c9    Naked  Quad                     <> 3789 [r4c9]

         Empty Rectangle r8b3            <> 3    [r1c3]

         XYZ-Wing [r2c3]/[r1c3]+[r2c7]   <> 7    [r2c2]   (now considered Advanced)


Last edited by daj95376 on Tue Apr 14, 2009 5:57 pm; edited 1 time in total
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gindaani



Joined: 06 Mar 2009
Posts: 79
PostPosted: Tue Apr 07, 2009 6:14 pm    Post subject: Reply with quote
I found this one very hard. I could not find a solution that did not involve a chain.

After the basics:

Code:

+-------------+-------------------+--------------+
| 6   8   347 | 5      347  2     | 1    9  37   |
| 5   17  347 | 1347   8    9     | 37   6  2    |
| 239 127 379 | 6      37   137   | 4    8  5    |
+-------------+-------------------+--------------+
| 289 27  6   | 3789   379  5     | 3789 14 14   |
| 89  3   789 | 4789   1    478   | 5    2  6    |
| 1   4   5   | 3789   2    6     | 3789 37 378  |
+-------------+-------------------+--------------+
| 4   6   1   | 3789   5    378   | 2    37 3789 |
| 7   9   38  | 2      6    14    | 38   5  14   |
| 38  5   2   | 134789 3479 13478 | 6    14 3789 |
+-------------+-------------------+--------------+

Play this puzzle online at the Daily Sudoku site

Quote:
72-2(89)-83-38-83-37 => r2c2<>7, r4c7<>7
3 skyscraper => r2c7<>3, r79c9<>3
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