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Set XY_02 Puzzle 27 -- Advanced

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sun Apr 19, 2009 10:56 pm    Post subject: Set XY_02 Puzzle 27 -- Advanced Reply with quote
Code:
 +-----------------------+
 | 8 . 1 | 4 2 5 | . . 6 |
 | . . . | . 8 . | . . . |
 | 6 . 5 | . . . | . 2 . |
 |-------+-------+-------|
 | 4 . . | 8 . . | . . 2 |
 | 5 1 . | . 9 . | 4 . . |
 | 2 . . | . . 4 | 6 . . |
 |-------+-------+-------|
 | . . . | . 3 8 | . 9 4 |
 | . . 4 | . . . | 2 6 . |
 | 1 . . | 2 . . | 3 . 8 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
 r6  b5  Locked Candidate 1              <> 5    [r6c8]
   c8b6  Locked Candidate 2              <> 1    [r4c7]

   c37   X-Wing                          <> 7    [r2c469],[r4c68]

 r3  b2  Locked Candidate 1              <> 7    [r3c9]

         Empty Rectangle c3b5            <> 3    [r2c4]
         turbot fish/ER  r1b4            <> 3    [r4c8]

   c28   X-Wing                          <> 3    [r6c4]

         XYZ-Wing [r2c6]/[r2c4]+[r4c6]   <> 1    [r3c6]

 -3r1c8  7r1c8  7r4c7  3r5c9  [ W-Wing ] <> 3 [r6c8],[r23c9]   -or-
 -5r4c7  7r4c7  7r1c8  5r9c8  [ W-Wing ] <> 5 [r4c8],[r7c7]    -or-
 -7r4c3  3r4c3  3r5c4  7r5c9  [ W-Wing ] <> 7 [r4c7]           -or-
 -7r5c4  3r5c4  3r4c3  7r6c2  [ W-Wing ] <> 7 [r6c45]
 +--------------------------------------------------------------+
 |  8     37    1     |  4     2     5     |  9     37    6     |
 |  9     2     37    |  16    8     136   |  157   4     135   |
 |  6     4     5     |  1379  17    379   |  8     2     13    |
 |--------------------+--------------------+--------------------|
 |  4     9     37    |  8     6     13    |  57    15    2     |
 |  5     1     6     |  37    9     2     |  4     8     37    |
 |  2     37    8     |  157   157   4     |  6     137   9     |
 |--------------------+--------------------+--------------------|
 |  7     56    2     |  156   3     8     |  15    9     4     |
 |  3     8     4     |  1579  157   179   |  2     6     157   |
 |  1     56    9     |  2     4     67    |  3     57    8     |
 +--------------------------------------------------------------+
 # 46 eliminations remain


Last edited by daj95376 on Sun Apr 26, 2009 5:28 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 1:43 pm    Post subject: Reply with quote
Unless I messed up basics, this puzzle is solved by
Quote:
obvious back-to-back x-wings on 7.

Ted
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon Apr 20, 2009 4:54 pm    Post subject: Reply with quote
tlanglet wrote:
Unless I messed up basics, this puzzle is solved by obvious back-to-back x-wings on 7

You might want to try this puzzle again.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Mon Apr 20, 2009 6:22 pm    Post subject: Reply with quote
Quote:
Unless I messed up basics, this puzzle is solved by Quote:
obvious back-to-back x-wings on 7.

Code:
.-----------.-----------------.---------------.
| 8  37  1  | 4     2    5    | 9    37   6   |
| 9  2   37 | 136   8    136  | 157  4    135 |
| 6  4   5  | 1379  17   1379 | 8    2    13  |
:-----------+-----------------+---------------:
| 4  9   37 | 8     6    13   | 57   15   2   |
| 5  1   6  | 37    9    2    | 4    8    37  |
| 2  37  8  | 157   157  4    | 6    137  9   |
:-----------+-----------------+---------------:
| 7  56  2  | 156   3    8    | 15   9    4   |
| 3  8   4  | 1579  157  179  | 2    6    157 |
| 1  56  9  | 2     4    67   | 3    57   8   |
'-----------'-----------------'---------------'
w-wing(37)with 7 in blocks 36 is needed to solve it.
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gindaani



Joined: 06 Mar 2009
Posts: 79
PostPosted: Mon Apr 20, 2009 7:37 pm    Post subject: Reply with quote
I had more 7's left on the board after the basics:

Code:

+---------+---------------+---------------+
| 8 37 1  | 4    2   5    | 9   37   6    |
| 9 2  37 | 1367 8   1367 | 157 4    1357 |
| 6 4  5  | 1379 17  1379 | 8   2    137  |
+---------+---------------+---------------+
| 4 9  37 | 8    6   137  | 157 1357 2    |
| 5 1  6  | 37   9   2    | 4   8    37   |
| 2 37 8  | 1357 157 4    | 6   137  9    |
+---------+---------------+---------------+
| 7 56 2  | 156  3   8    | 15  9    4    |
| 3 8  4  | 1579 157 179  | 2   6    157  |
| 1 56 9  | 2    4   67   | 3   57   8    |
+---------+---------------+---------------+

Play this puzzle online at the Daily Sudoku site

The 37 w-wing was all that was necessary to solve.
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