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8 clue (Regional constraints only) puzzles
http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=13&t=753		 Page 2 of 3
Author:  Børge [ Mon May 24, 2010 12:32 pm ]
Post subject:  Alternate Hands X-OL 3 images
Maurice, I am not sure which of my two images is correct, the left or right one.

Alternate Hands X-OL 3 images: 
Image     Image
Author:  tarek [ Mon May 24, 2010 6:38 pm ]
Post subject:  Re: 8 clue (Regional constraints only) puzzles
From my experiments ... It seems that the hands variant forces the formation of the X diagonals & the old lace group

This one should be easy
Image

another easy
Image

This one is solvable
Image

This is a solvable diamond
Image

This is very difficult even with the diagonals, only when the old lace group is used that the difficulty goes down
Image

enjoy,

tarek
Author:  HATMAN [ Tue May 25, 2010 8:43 am ]
Post subject:  Re: 8 clue (Regional constraints only) puzzles
They are equivalent as all eight cells see r5c5
Author:  tarek [ Tue May 25, 2010 10:24 am ]
Post subject:  Re: 8 clue (Regional constraints only) puzzles
Maurice, after looking at your last post .... I looked hard at my post only to discover that most likely your post was a respnonse to Børge's. :x

tarek
Author:  HATMAN [ Wed May 26, 2010 11:01 am ]
Post subject:  Re: 8 clue (Regional constraints only) puzzles
Indeed - must have been a bit confusing.
Author:  enxio27 [ Sun Jun 20, 2010 1:48 pm ]
Post subject:  Re: Anti-King Anti-Knight Symmetric 8-clue puzzles
tarek wrote:
the Anti-King Anti-Knight Sudoku

I'm having a hard time understanding this variant. Would you please explain?

(BTW, I'm also looking forward to trying out those hand variants.)
Author:  tarek [ Sun Jun 20, 2010 5:26 pm ]
Post subject:  Re: Anti-King Anti-Knight Symmetric 8-clue puzzles
enxio27 wrote:
tarek wrote:
the Anti-King Anti-Knight Sudoku

I'm having a hard time understanding this variant. Would you please explain?

(BTW, I'm also looking forward to trying out those hand variants.)

The Anti Chess variants require you to understand chess piece movements to visualize them.
Pick a cell (x) , any other cell that is exactly a single move away can't be equal to (x). You have 81 cells, so you can imagine how this feature can limit your choices.

Anti-kNight: A knight's move away
Anti-King: A king's move away
Anti-kNight Anti-King: A combination of both

tarek
Author:  enxio27 [ Sun Jun 20, 2010 7:57 pm ]
Post subject:  Re: Anti-King Anti-Knight Symmetric 8-clue puzzles
tarek wrote:
The Anti Chess variants require you to understand chess piece movements to visualize them.

Right. (I'm sorry--I probably should have said that I'm familiar with chess and the moves of the various pieces, although I'm not particularly fond of the game.)

Quote:
Pick a cell (x) , any other cell that is exactly a single move away can't be equal to (x).

So, for a knight's move, does that include ALL the cells in the L, or just the ending cell?

And all of the normal row, column, and box constraints of the sudoku still apply, correct?
Author:  tarek [ Sun Jun 20, 2010 8:19 pm ]
Post subject:  Re: 8 clue (Regional constraints only) puzzles
enxio27 wrote:
Quote:
Pick a cell (x) , any other cell that is exactly a single move away can't be equal to (x).

So, for a knight's move, does that include ALL the cells in the L, or just the ending cell?

And all of the normal row, column, and box constraints of the sudoku still apply, correct?
It will be the the cell at the end of the L ... So you can have up to 8 cells at the end of a friutful L jump. If you are close to the edges, you would have less cells to jump to.

Look at the Blue cell in the picture found in post 8 of the previous page. Unless mentioned, there should be NO grid WRAPPING (That same picture will show you how an Anti-Knight with WRAPPING works when you look at the green or red cell examples).

And unless mentioned, The rules of ordinary (vanilla) sudoku also apply.

tarek
Author:  enxio27 [ Mon Jun 21, 2010 4:19 am ]
Post subject:  Re: 8 clue (Regional constraints only) puzzles
tarek wrote:
It will be the the cell at the end of the L ... So you can have up to 8 cells at the end of a friutful L jump. If you are close to the edges, you would have less cells to jump to.

Thanks for the explanation, tarek! I'll have to give one of these a try (probably the easy one :lol: ).
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