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Puzzle NR_039

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Sun Jun 14, 2009 5:59 pm    Post subject: Puzzle NR_039 Reply with quote

Involved, but it lets me complete this puzzle source file.

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

Play this puzzle online at the Daily Sudoku site

Code:
 r3  b3  Locked Pair                     <> 17   [r1c8],[r2c8],[r3c245]
   c8    Naked  Pair                     <> 34   [r8c8]
   c7b9  Locked Pair                     <> 89   [r7c9]
   c5    Naked  Pair                     <> 39   [r123c5]
 r7  b9  Locked Pair                     <> 34   [r7c34]
   c5b2  Locked Triple                   <> 467  [r13c4],[r23c6]
 r9  b7  Locked Candidate 1              <> 3    [r9c6]

 r47c89  <34> UR Type 1                  <> 34   [r4c9]

   c2    Naked  Pair                     <> 36   [r15c2]

         XY-Wing  [r4c4]/[r6c5]+[r7c4]   <> 9    [r8c5]
         XY-Wing  [r7c4]/[r4c4]+[r8c5]   <> 3    [r6c5],[r8c4]

   c24   X-Wing                          <> 3    [r3c16]

 r7  b2  turbot fish/ER                  <> 9    [r2c3]

   c3b7  Locked Candidate 2              <> 9    [r9c1]

         XY-Wing  [r9c6]/[r2c6]+[r9c1]   <> 3    [r2c1]

         XYZ-Wing [r2c3]/[r2c5]+[r3c2]   <> 6    [r2c1]

         XY-Wing  [r2c6]/[r2c1]+[r3c4]   <> 5    [r3c1]


Last edited by daj95376 on Fri Jun 26, 2009 9:04 pm; edited 1 time in total
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

PostPosted: Sun Jun 14, 2009 6:23 pm    Post subject: Reply with quote

Needed seven steps
Quote:
finned x-wing 9
xyz-wing 376
ur 43
xy-wing 693
x-wing 3
xy-wing 693
xy-wing 395
Shocked
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Sun Jun 14, 2009 8:21 pm    Post subject: Reply with quote

My first pass involved five steps including some transports/extensions.
Quote:
Type 1 UR,
xy-wing 369 with pivot 36 in r4c4,
x-wing 3 in r34c24,
an extended xy-wing 379 with pivot 37 in r6c3,
xy-wing 569 with both wings transported.


Very nice puzzle.

Ted
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Mon Jun 15, 2009 6:22 am    Post subject: Reply with quote

Code:
.------------------.------------------.------------------.
| 4569  679   8    | 59    467   1    | 3     56    2    |
| 3569  1     3679 | 2     67    39   | 4     56    8    |
| 3456  36    2    | 358   46    38   | 7     9     1    |
:------------------+------------------+------------------:
| 1     369   5    | 369   8     7    | 2     34    349  |
| 369   3679  4    | 1     2     369  | 5     8     379  |
| 8     2     379  | 4     39    5    | 6     1     379  |
:------------------+------------------+------------------:
| 7     8     69   | 69    5     2    | 1     34    34   |
| 2     5     1    | 389   39    4    | 89    7     6    |
| 369   4     369  | 7     1     689  | 89    2     5    |
'------------------'------------------'------------------'

1...UR{3,4} type 1, r47c89 removes 3 and 4 from r4c9
2...(9=8)r8c7 - (8)r9c7 = (8)r9c6 - (8=3)r3c6 - (3=6)r3c2 - (6)r4c2 = (6)r4c4 - (6=9)r7c4; r8c45 <> 9
3...(3=6)r3c2 - (6)r4c2 = (6)r4c4 - (6=3)r5c6 - (6=9)r9c6 - (9)r2c6 = (9-5)r1c4 = (5)r3c4; r3c4 <> 3
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