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Set T_03 Puzzle 86 -- Advanced

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sun Apr 19, 2009 10:54 pm    Post subject: Set T_03 Puzzle 86 -- Advanced Reply with quote
Code:
 +-----------------------+
 | 7 . 3 | 1 . . | . . 2 |
 | . 1 . | 5 . . | 9 . 3 |
 | 5 . . | . . 9 | . 4 1 |
 |-------+-------+-------|
 | 8 2 . | 3 . . | 7 . . |
 | . . . | . 2 . | . . . |
 | . . 6 | . . 4 | . . . |
 |-------+-------+-------|
 | . 4 . | 2 . . | . 3 . |
 | . . 8 | . . . | 2 . . |
 | 2 5 7 | . . . | . . 9 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
 r7  b7  Naked  Pair                     <> 19   [r7c567]
   c7    Naked  Pair                     <> 58   [r56c7]
   c7b6  Naked  Pair                     <> 13   [r45c8]

         XYZ-Wing [r4c5]/[r4c6]+[r9c5]   <> 1    [r6c5]

         Skyscraper      r47c5           <> 6    [r5c9],[r9c8]   -or-
         Skyscraper      c49r5           <> 6    [r7c5],[r9c8]

         Skyscraper      r69c4           <> 8    [r5c8],[r7c9]

   c9b6  Naked  Pair                     <> 58   [r45c8]
   c5    Naked  Pair                     <> 57   [r4c5]
   c6    Naked  Pair                     <> 15   [r57c6]
 r4  b5  Locked Candidate 1              <> 1    [r4c3]

 BUG+2                 => [r6c4]=9
 [r5c3]=9 => [r5c4]<>9 => [r6c4]=9
 [r5c4]=8 => [r5c4]<>9 => [r6c4]=9
 *--------------------------------------------------*
 | 7    9    3    | 1    4    6    | 58   58   2    |
 | 6    1    4    | 5    8    2    | 9    7    3    |
 | 5    8    2    | 7    3    9    | 6    4    1    |
 |----------------+----------------+----------------|
 | 8    2    59   | 3    16   15   | 7    69   4    |
 | 4    37   15+9 | 69+8 2    78   | 13   69   58   |
 | 19   37   6    | 89   57   4    | 13   2    58   |
 |----------------+----------------+----------------|
 | 19   4    19   | 2    57   78   | 58   3    6    |
 | 3    6    8    | 4    9    15   | 2    15   7    |
 | 2    5    7    | 68   16   3    | 4    18   9    |
 *--------------------------------------------------*

         XY-Wing  [r5c6]/[r5c9]+[r6c5]   <> 5    [r6c9]          complementary
         XY-Wing  [r6c5]/[r5c6]+[r6c9]   <> 8    [r5c9],[r6c4]


Last edited by daj95376 on Sun Apr 26, 2009 5:23 am; edited 1 time in total
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Mon Apr 20, 2009 1:26 pm    Post subject: Reply with quote
Three steps:
Quote:
skyscraper 6,
xyz-wing 157,
BUG+2.

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sun Apr 26, 2009 3:14 pm    Post subject: Reply with quote
Also three steps, but different than Ted's. XYZ (156), ER (6) and XY (578).
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