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Puzzle VH_010

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed May 06, 2009 6:14 pm    Post subject: Puzzle VH_010 Reply with quote
Code:
 +-----------------------+
 | . 5 7 | 8 2 . | . 9 . |
 | 8 6 . | 9 . . | . 2 7 |
 | 2 . 9 | . . . | 8 . . |
 |-------+-------+-------|
 | 4 8 . | . . . | 3 . . |
 | 9 . . | . 7 . | . 6 . |
 | . . . | . . 3 | . . . |
 |-------+-------+-------|
 | . . 2 | 3 . . | 4 . . |
 | 5 3 . | . 4 . | . 8 . |
 | . 4 . | . . . | . . 9 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri May 15, 2009 5:12 am    Post subject: Reply with quote
Code:
   c7    Naked  Pair                     <> 15   [r189c7]
   c7b9  Locked Pair                     <> 27   [r8c9]
 r8      Naked  Pair                     <> 16   [r8c4]
   c6b2  Locked Candidate 1              <> 1    [r4579c6]
 r7  b9  Locked Candidate 1              <> 5    [r7c56]

         UR Type 1 [r89c47]              <> 27   [r9c4]

         XY-Wing  [r3c8]/[r1c9]+[r7c8]   <> 1    [r78c9]

   c58   X-Wing                          <> 5    [r3c46],[r6c34]

         XY-Wing  [r7c5]/[r6c5]+[r9c4]   <> 5    [r5c4]

     b5  Hidden Pair                     =  58   [r5c6],[r6c5]
   c4b5  Locked Candidate 1              <> 4    [r3c4]

         XY-Wing  [r5c7]/[r5c4]+[r6c8]   <> 4    [r5c9],[r6c4]
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Fri May 15, 2009 6:14 am    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
| 3      5      7     | 8      2      14    | 6      9      14    |
| 8      6      4     | 9      3      15    | 15     2      7     |
| 2      1      9     | 4567   56     4567  | 8      45     3     |
:---------------------+---------------------+---------------------:
| 4      8      156   | 1256   9      256   | 3      7      125   |
| 9      2      3     | 145    7      458   | 15     6      1458  |
| 16     7      156   | 12456  1568   3     | 9      145    12458 |
:---------------------+---------------------+---------------------:
| 167    9      2     | 3      168    678   | 4      15     156   |
| 5      3      16    | 27     4      9     | 27     8      16    |
| 167    4      8     | 12567  156    2567  | 27     3      9     |
'---------------------'---------------------'---------------------'

I can shorten that a little.
1...extended w-wing (1,5)
(1=5)r7c8 - (5)r3c8 = (5)r2c7 - (5=1)r2c6 - (1)r1c6 = (1)r1c9; r8c9 <> 1
2...(2=1)r4c9 - (1)r1c9 = (1)r1c6 - (1=5)r2c6 - (5)r3c5 = (5-8)r6c5 = (8)r6c9; r6c9 <> 2
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