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Set T_03 Puzzle 87 -- VH

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Apr 15, 2009 8:09 pm    Post subject: Set T_03 Puzzle 87 -- VH Reply with quote
Code:
 +-----------------------+
 | . . . | . 9 3 | . . . |
 | . 7 . | 2 . 4 | . . . |
 | . . 4 | 7 1 . | . 2 . |
 |-------+-------+-------|
 | . 5 6 | . . 7 | . 3 9 |
 | 3 . 8 | . . . | 7 . . |
 | 7 2 . | 3 . . | 6 . . |
 |-------+-------+-------|
 | . . . | . 5 2 | . . . |
 | . . 2 | 8 . . | . 9 5 |
 | . . . | 9 . . | . 7 . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
   c6b8  Naked  Pair                     <> 16   [r3c6]
 r8      Naked  Pair                     <> 16   [r8c27]
   c8b6  Locked Candidate 1              <> 5    [r12c8]
 r2      Naked  Triple                   <> 168  [r2c17]
   c7b9  Locked Candidate 2              <> 1    [r7c89],[r9c9]

         UR Type 1 [r89c16]              <> 16   [r9c1]

         XY-Wing  [r1c4]/[r1c2]+[r3c6]   <> 8    [r3c2]

 r3  b1  Locked Candidate 1              <> 6    [r3c9]

         XY-Wing  [r1c8]/[r1c4]+[r5c8]   <> 5    [r5c4]   complementary
         XY-Wing  [r5c8]/[r1c8]+[r5c4]   <> 6    [r1c4]


Last edited by daj95376 on Wed Apr 22, 2009 10:44 am; edited 1 time in total
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sun Apr 19, 2009 8:32 am    Post subject: Reply with quote
Code:
.------------------.------------------.------------------.
| 2     68    1    |C56    9     3    |B458  A468   7    |
| 59    7     3    | 2     68    4    | 59    168   168  |
| 5689  689   4    | 7     1     58   | 3589  2     368  |
:------------------+------------------+------------------:
| 4     5     6    | 1     28    7    | 28    3     9    |
| 3     1     8    |D56    246   9    | 7   E-45    24   |
| 7     2     9    | 3     48    58   | 6     1458  148  |
:------------------+------------------+------------------:
| 1689  3689  7    | 4     5     2    | 138   68    368  |
| 16    34    2    | 8     7     16   | 34    9     5    |
| 168   468   5    | 9     3     16   | 1248  7     2468 |
'------------------'------------------'------------------'

Quote:
2 xy-wings will do it


but...
I see a nice move to do it in one.
(4)A = (4-5)B - (5)C = (5)D - (5)E; E is not 4
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