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Puzzle NR 09/12/09 (B)

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Dec 09, 2009 11:02 am    Post subject: Puzzle NR 09/12/09 (B) Reply with quote
Code:
 +-----------------------+
 | 1 . . | 5 . 3 | 6 . . |
 | . . . | . 8 . | . . . |
 | . . 2 | . 1 . | . . . |
 |-------+-------+-------|
 | 8 . . | . . . | 9 . . |
 | . 1 5 | . 7 9 | 8 3 . |
 | 6 . . | . 4 . | . 5 . |
 |-------+-------+-------|
 | 5 . . | 8 6 . | 2 . 4 |
 | . . . | . 5 1 | . 8 . |
 | . . . | . . . | 5 . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

1-Stepper wrote:
<27+9> XYZ-Wing.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Dec 12, 2009 2:02 am    Post subject: Reply with quote
My first step did coincide with your one-stepper, but I must've missed something, because I finished it only after playing a Hidden UR on 39.
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Dec 12, 2009 6:37 am    Post subject: Reply with quote
Marty R. wrote:
My first step did coincide with your one-stepper, but I must've missed something, because I finished it only after playing a Hidden UR on 39.

I'm at a loss for the discrepancy. Here is the grid immediately after initial loading. There is a Naked Single and several Hidden Singles present -- including r4c8=4 in [b6] to expose the <27+9> XYZ-Wing for r1c9<>9. After that, basics complete the puzzle.

Code:
 *--------------------------------------------------------------------------------------*
 | 1        4789     4789     | 5       *29       3        | 6       *279+4    2789     |
 | 3479     345679   34679    | 24679    8        2467     | 1347     12479    123579   |
 | 3479     3456789  2        | 4679     1        467      | 347     *79+4     35789    |
 |----------------------------+----------------------------+----------------------------|
 | 8        2347     347      | 1236     23       256      | 9        12(4)67  1267     |
 | 24       1        5        | 26       7        9        | 8        3        26       |
 | 6        2379     379      | 123      4        28       | 17       5        127      |
 |----------------------------+----------------------------+----------------------------|
 | 5        379      1379     | 8        6       (7)       | 2        179      4        |
 | 23479    234679   34679    | 23479    5        1        | 37       8        3679     |
 | 23479    2346789  1346789  | 23479    239      247      | 5        1679     13679    |
 *--------------------------------------------------------------------------------------*
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Sat Dec 12, 2009 3:55 pm    Post subject: Reply with quote
Initially, I had a three stepper;
type 6 UR 39 with strong links provided two deletions,
Kraken skyscraper 9 made a deletion,
xyz-wing 27-9 to complete the puzzle.

Then I tried only the xyz-wing 27-9 to complete the puzzle in one step.

Ted
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