From: Allan C. Wechsler <ACW@riverside.scrc.symbolics.com>
I hope I'm not wasting too many people's time, but... can you describe
the Rubik's Tangle puzzle for those of us who haven't seen it? Your
description was interesting, but I wonder about your statement that it
can't be solved without a computer. Perhaps you just didn't have the
I would love to hear an insight that makes this puzzle tractible in real
time (hours rather than days) by hand. Here's a brief description of
Tangle #1; as I said in my earlier posting, I don't know how the other 3
differ, though I'm pretty sure they each have the same number of tiles.
Tangle #1 consists of 25 square tiles, each of which has four colored
ropes crossing it in the following pattern. (Note: This may be mirror
imaged, since I'm working from memory.)
--------------------- | @ # | | @ # | |$$ @ # %%%%| | $ @ %#% | | $ @ %% # | | $ %@ # | | $ %% @@# | | %%% #@@ | |%%%% $ # @@@| | $ # | | $ # | ---------------------
The connection marked with $ actually wanders around the tile a bit more,
but the connectivity is as shown. The object is to place the tiles in a
5x5 array such that wherever two tiles touch the colors of the ropes match.
In Tangle #1 each permutation of colors occurs once, with one permutation
The box says that if you get all four Tangles, you can put them together
to make a 10x10 array under the same color-matching constraints.