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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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 Posted: Fri Jul 03, 2009 1:53 pm Post subject: X is the key? |
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There are Xs involved here. Finned-x and xy-wings are enough, there is a vanilla x-wing which sets up an xyz-wing.
If you want swordfish look for an initial W-wing, that sets up sashimi and finned swordfish. There is a finned sword on 6s at the get-go but it is of little value puzzle-wise.
| Code: | . 5 8|2 . 1|. . .
. 2 3|. 7 .|. . 8
1 . .|. . .|. . .
-----+-----+-----
. 6 .|. 8 2|. . 1
. 8 .|. . .|. 7 .
5 . .|3 6 .|. 2 .
-----+-----+-----
. . .|. . .|. . 3
9 . .|. 2 .|5 8 .
. . .|9 . 5|4 1 . |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Jul 03, 2009 2:54 pm Post subject: |
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Two extended xy-wings did the job for me: | Quote: | xy-wing 69-7 with pivot 69 in r7c8, pincer 67 in r8c9 and extended pincer 79 in r7c4 via 69-95-56-67 which deletes 7 from r8c46.
Or, as a chain: (7=6)r7c4 - (6=5)r2c4 - (5=9)r2c8 - (9=6)r7c8 - (6=7)r8c9; r8c46<>7,
xy-wing 23-6 with pivot 23 in r5c1 deletes 6 in r7c7 which opens up a transport of 6 from r7c1 - r7c8 - r9c9 and deletes the 6 in r5c9
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Fri Jul 03, 2009 3:11 pm Post subject: |
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I needed three steps: | Quote: | kite 6
xy-wing 596
w-wing 54 |
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