need some help

Post the puzzle or solving technique that's causing you trouble and someone will help

need some help

Postby storm_norm » Thu Mar 20, 2008 7:53 pm

Code: Select all
2467   2468   247    | 678    1      9      | 348    5      38
9      4568   457    | 5678   3567   3567   | 2      48     1
1      58     3      | 58     2      4      | 6      9      7
------------------------------------------------------------------
3      24569  2459   | 457    4579   57     | 5789   1      5689
46     4569   1      | 2      34579  8      | 3579   367    3569
8      7      59     | 156    3569   1356   | 359    2      4
------------------------------------------------------------------
5      234    8      | 9      467    267    | 1      3467   36
47     39     6      | 1457   457    157    | 389    38     2
247    1      2479   | 3      8      267    | 4579   467    569


sorry I don't have the original puzzle but this is the puzzle after basics.

it's also being discussed here:

http://www.dailysudoku.com/sudoku/forums/viewtopic.php?t=2423&sid=de60dd619ec8aa6d194f0608733426e4

thanx in advance
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Postby daj95376 » Fri Mar 21, 2008 1:41 am

A (contradictory) implication chain okay?

Code: Select all
[r1c7]=3 [r9c7]=4 [r9c9]=5 [r8c7]=9 [r6c7]=5 [r6c3]=9 [b7]~9 => [r1c7]<>3

SSTS completes puzzle.
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Postby eleven » Fri Mar 21, 2008 5:26 pm

Code: Select all
2467   2468   247    | 678    1      9      | 348    5      38
9      4568   457    | 5678   3567   3567   | 2      48     1
1      58     3      | 58     2      4      | 6      9      7
------------------------------------------------------------------
3      24569  2459   | 457    4579   57     | 5789   1      5689
46     4569   1      | 2      34579  8      | 3579   367    3569
8      7      59     | 156    3569   1356   | 359    2      4
------------------------------------------------------------------
5      234    8      | 9      467    267    | 1      3467   36
47     39     6      | 1457   457    157    | 389    38     2
247    1      2479   | 3      8      267    | 4579   467    569

r6c5<>9 -> finned x-wing 9 in r69 -> r8c7<>9 -> r8c2=9

Edit: made a mistake, can only continue this way:
So one of r6c5 and r8c2 is 9
r6c5=9 -> r6c3=5 -> r6c7=3 -> r1c9=3 -> r7c9=6
r8c2=9 -> r7c2=3 -> r7c9=6

Solves with x-wing, kite, xyz-wing, w-wing
Last edited by eleven on Fri Mar 21, 2008 5:21 pm, edited 1 time in total.
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Postby daj95376 » Fri Mar 21, 2008 5:42 pm

eleven wrote:r6c5<>9 -> finned x-wing 9 in r69 -> r8c7<>9 -> r8c2=9
r6c5=9 -> r6c3=5 -> r6c7=3 -> 8c8=3 -> r8c2=9

What about the 3s in [r7c89]:?:

Otherwise, a great stab at a Kraken X-Wing.
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Postby eleven » Fri Mar 21, 2008 6:44 pm

daj95376 wrote:
eleven wrote:r6c5<>9 -> finned x-wing 9 in r69 -> r8c7<>9 -> r8c2=9
r6c5=9 -> r6c3=5 -> r6c7=3 -> 8c8=3 -> r8c2=9

What about the 3s in [r7c89]:?:
Ah, thank you. I had eliminated 3 in r7c8 before, but then thought it was not necessary.
Edit: Oops, how was that ?

I had to change my solution, edited above.
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