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Set XY_03 Puzzle 002

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Mon May 11, 2009 5:02 am    Post subject: Set XY_03 Puzzle 002 Reply with quote
Code:
 +-----------------------+
 | . . 5 | 1 . . | . . 2 |
 | . . . | . . . | . . . |
 | 2 . 8 | . . 5 | . 3 6 |
 |-------+-------+-------|
 | 5 . . | . 4 . | . 2 1 |
 | . . . | 5 . . | 8 . 4 |
 | . . 4 | . . . | 3 . 5 |
 |-------+-------+-------|
 | . . . | . 1 4 | . . 3 |
 | . . 2 | 8 . . | . 5 . |
 | 3 . 6 | 2 5 7 | 1 . 8 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

Code:
 after basics: choice of two chains for single-stepper

 (3)r5c56 = (3-2)r5c2 = (2-8)r6c2 = (8-7)r4c2 = (7)r4c4                => [r4c4]<>3
 (2)r5c2  = (2-8)r6c2 = (8-7)r4c2 = (7-3)r4c4 = r2c4 - r1c56 = (3)r1c2 => [r5c2]<>3

You must find an alternate solution!
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Mon May 11, 2009 7:58 am    Post subject: Reply with quote
Code:
.---------------------.---------------------.---------------------.
|*4679  *367    5     | 1      3679   369   | 479    8      2     |
|*4679  *367   *39    |*34679  28     28    | 5      1      79    |
| 2      1      8     | 479    79     5     | 479    3      6     |
:---------------------+---------------------+---------------------:
| 5     *3678  3-9    |*3679   4      3689  | 69     2      1     |
|*679    2367   1     | 5      3679   2369  | 8      679    4     |
|*679    28     4     | 679    28     1     | 3      679    5     |
:---------------------+---------------------+---------------------:
| 8      5      7     | 69     1      4     | 2      69     3     |
| 1      4      2     | 8      369    369   | 679    5      79    |
| 3      9      6     | 2      5      7     | 1      4      8     |
'---------------------'---------------------'---------------------'

hp = hidden pair
(9)r56c1 = (hp49 - 7)r12c1 = (7)r12c2 - (7)r4c2 = (7-3)r4c4 = (3)r2c4 - (3=9)r2c3; r4c3 <> 9
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed May 13, 2009 3:45 pm    Post subject: Reply with quote
I had trouble with this one. M-Wing, four ERs, UR, X-Wing, then nothing. I had to turn to Medusa and a wrap finished things up.
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed May 13, 2009 8:00 pm    Post subject: Reply with quote
My Solution wrote:
X-Wing, 4x Empty Rectangle, UR Type 2, W-Wing, and XY-Wing.
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Wed May 13, 2009 8:30 pm    Post subject: Reply with quote
I also had a long series of steps:
x-wing 3,
finned swordfish 6,
kite 6,
2 @ kite 9,
ER 9,
w-wing 67,
xy-wing 379,
xy-wing 789 plus transport.

Ted
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