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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Tue Aug 24, 2010 4:43 am Post subject: Puzzle 10/08/24: A |
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| Code: | +-----------------------+
| 3 . . | 8 5 . | . . . |
| . 8 . | . 2 . | . . 1 |
| . . . | . . 7 | . . 6 |
|-------+-------+-------|
| 2 . . | . . 5 | 4 . . |
| 8 3 . | . . 2 | 1 . 5 |
| . . 5 | 3 6 4 | 2 . . |
|-------+-------+-------|
| . . . | 5 7 8 | . 1 . |
| . . . | . . . | 6 5 . |
| . 5 8 | . 1 . | . . 4 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Tue Aug 24, 2010 8:23 am Post subject: |
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| Quote: | 7-SIS AIC net : Kraken cell (239)R3C8 : => r7c9=2
(2)r3c8-2C9
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(3)r3c8-3C5-3C3-2R7
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(9)r3c8-9C7-(92)R7C9 |
Last edited by JC Van Hay on Tue Aug 24, 2010 8:39 pm; edited 1 time in total |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Tue Aug 24, 2010 10:12 am Post subject: |
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Two VH moves..
| Quote: | xy-wing(29-7) r7c9 ; r4c8<>7
type 1 UR(67) ; r1c3<>67=2 |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Aug 24, 2010 4:30 pm Post subject: |
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one "almost" move.....................
| Quote: | AXY-wing -379 vertex (79)r1c7, pincers (39)r3c8 & (37)r9c7 with fin (2)r3c8
If xy-wing is true plus transport (3)r3c8-r3c5=(3)8c5; r9c6<>3
If fin is true (2)r3c8-(2=7)r9c8-(7=3)r9c7; r9c6<>3
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Ted
[JC, I just looked at your post and we seemed to have used similar cells, but I am not familiar with your notation and am therefore not sure except for the one cell.] |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Tue Aug 24, 2010 8:47 pm Post subject: |
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Ted, here is an equivalent representation of your proof ... So you can completely compare.
| Quote: | 5-SIS AIC net : Kraken Cell (239)R3C8 : SIS[(3)r9c7,(3)r8c5] : => r9c6<>3
(2)r3c8-(27)R9C8-(73)R9C7 [Fin (2)r3c8]
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(3)r3c8-3C5 [Transport]
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(9)r3c8-(97)R1C7-(73)R9C7 [XY Wing -379]
Your target, (3)r9c6 instead of my (9)r7c9, makes the Kraken Cell shorter, needing only 5-SIS !
Note : the strong inferences (=) are done inside the SIS, while the weak inferences (-) are done between the SIS.
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Aug 24, 2010 10:31 pm Post subject: |
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JC,
Thanks for the info, especially the footnote about the implied strong links.
And yes we had some similar paths.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Aug 25, 2010 4:23 am Post subject: |
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W-Wing (79).
Next and last move can be either the pincer situation from the 12 UR (which I used) or the Type 1 UR on 67. |
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