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| Nick70
| Joined: 08 Jun 2005 | Posts: 160 | : | | Items |
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Posted: Sat Jul 23, 2005 11:52 pm Post subject: XY-Wing compendium |
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Here are a few puzzles that can be solved using the XY-Wing pattern. You might need to use other advanced techinques like X-Wing or Swordfish to solve some of them.
The puzzles are roughly in order of difficulty. YMMV.
Puzzle 1:
Code: | . . 2 | . 9 . | 8 . 5
. 3 4 | 6 . . | . . .
5 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 6 | . 1 . | 3 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 7
. . . | . . 7 | 4 2 .
8 . 9 | . 3 . | 1 . . |
Puzzle 2:
Code: | . . 1 | . 7 . | 8 . 5
. 3 2 | 6 . . | . . .
4 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 9 | . 1 . | 7 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 7
. . . | . . 7 | 4 2 .
6 . 3 | . 9 . | 1 . . |
Puzzle 3:
Code: | . . 4 | . 9 . | 7 . 6
. 3 1 | 6 . . | . . .
2 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 9 | . 1 . | 6 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 7
. . . | . . 7 | 8 2 .
5 . 6 | . 4 . | 3 . . |
Puzzle 4:
Code: | . . 7 | . 5 . | 6 . 8
. 3 2 | 6 . . | . . .
4 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 6 | . 1 . | 7 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 4
. . . | . . 7 | 9 2 .
8 . 5 | . 2 . | 1 . . |
Puzzle 5:
Code: | . . 2 | . 9 . | 7 . 5
. 3 8 | 6 . . | . . .
4 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 9 | . 1 . | 6 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 4
. . . | . . 7 | 8 2 .
7 . 3 | . 6 . | 9 . . |
Puzzle 6:
Code: | . . 1 | . 9 . | 5 . 2
. 3 4 | 6 . . | . . .
7 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 9 | . 1 . | 8 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 9
. . . | . . 7 | 3 2 .
6 . 8 | . 5 . | 4 . . |
Puzzle 7:
Code: | . . 9 | . 4 . | 5 . 7
. 3 2 | 6 . . | . . .
1 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 7 | . 1 . | 9 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 6
. . . | . . 7 | 4 2 .
8 . 3 | . 5 . | 1 . . |
Puzzle 8:
Code: | . . 9 | . 4 . | 1 . 3
. 3 5 | 6 . . | . . .
7 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 8 | . 1 . | 6 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 7
. . . | . . 7 | 5 2 .
6 . 1 | . 8 . | 9 . . |
Puzzle 9:
Code: | . . 7 | . 2 . | 6 . 5
. 3 9 | 6 . . | . . .
4 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 6 | . 1 . | 2 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 4
. . . | . . 7 | 9 2 .
8 . 1 | . 6 . | 3 . . |
Puzzle 10:
Code: | . . 9 | . 8 . | 7 . 6
. 3 2 | 6 . . | . . .
5 . . | . . . | . . .
-------+-------+-------
. . . | . . 5 | . . .
. . 8 | . 1 . | 2 . .
. . . | 4 . . | . . .
-------+-------+-------
. . . | . . . | . . 5
. . . | . . 7 | 8 2 .
7 . 1 | . 3 . | 6 . . |
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| Nick70
| Joined: 08 Jun 2005 | Posts: 160 | : | | Items |
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Posted: Sun Aug 07, 2005 9:51 am Post subject: |
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This is a nice xy-wing puzzle.
My solver does 7 of them in a row, before finally being able to place a big number. Mind you, they might not be all needed Still, it might be one of the best xy-wing examples to date--especially because it doesn't require any other advanced technique apart from a hidden pair (or a naked triple).
Code: | ..9.4.8.1
.376.....
6........
.....5...
..8.1.7..
...4.....
........7
.....732.
5.4.2.9.. |
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| angusj Site Admin
| Joined: 18 Jun 2005 | Posts: 406 | : | | Items |
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Posted: Fri Sep 09, 2005 10:43 am Post subject: |
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Nick70 wrote: | This is a nice xy-wing puzzle. |
Perhaps you'll like this one too.
Code: | *-----------*
|8.9|.6.|.2.|
|...|..1|.9.|
|.7.|...|..8|
|---+---+---|
|4..|..9|.52|
|..2|.4.|9..|
|98.|6..|..1|
|---+---+---|
|5..|...|.6.|
|.9.|2..|...|
|.2.|.8.|3.7|
*-----------* |
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| Nick70
| Joined: 08 Jun 2005 | Posts: 160 | : | | Items |
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Posted: Fri Sep 09, 2005 11:53 am Post subject: |
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Thanks Angus, really excellent. Lots of turbots and lots of xy-wings. |
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| angusj Site Admin
| Joined: 18 Jun 2005 | Posts: 406 | : | | Items |
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Posted: Fri Sep 09, 2005 12:27 pm Post subject: |
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Nick70 wrote: | Thanks Angus, really excellent. Lots of turbots and lots of xy-wings. |
I've got dozens of them if you want more |
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