Message #361

From: Remigiusz Durka <thesamer@interia.pl>
Subject: There should be some prizes for contests :P
Date: Wed, 03 Jan 2007 19:52:31 +0100

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Melinda wrote:

And now for the new challenge:
Below is a state-only log file for what I suspect may be the 4D
equivalent of the "superflip" pattern. I call it the "superduperflip" . :-)
The challenge is to come up with the shortest solution for this one.
There’s lots of regularity–in fact I think that it has the same
symmetry as the solved state–so it should be pretty easy to find a
short solution, right? Well, grab the latest version of MC4D and give it
a try. Be sure to also copy the period at the end when you go to paste
it into a log file.

Good luck!
-Melinda

___________________________

MagicCube4D 2 0 0 3
000010000020304050000060000
111171111121314151111101111
222212222272324202222262222
333313333323730353333363333
444414444424047454444464444
555515555505354575555565555
666606666626364656666676666
777767777727374757777717777
.
—————————-

>>>>>>>>>>>>>>>>>>>>>>>>>>>

Hello!

Finally I found time to try this.

Result: 68 moves

MagicCube4D 2 0 68 3
666666666666666666666666666
777777777777777777777777777
555555555555555555555555555
333333333333333333333333333
444444444444444444444444444
222222222222222222222222222
000000000000000000000000000
111111111111111111111111111
122:2 412 122:2 412 122:2 412 122:2 412 016:2 122:2
412 122:2 412 122:2 412 122:2 412 010:2 416:-1 614:-1
218 016:2 414 14:2 414 14:2 414 14:2 414 14:2
010:2 414 14:2 414 14:2 414 14:2 414 14:2 28
614:-1 012 26 614:-1 310 616 316 610 612:-1 314:2
216 314:2 216 314:2 216 314:2 216 04:2 314:2 216
314:2 216 314:2 216 314:2 216 022:2 614:-1 616 310
610 316 612:-1 220 014.

It was probably the same effort like 2^4 shortest contest - okay, maybe bigger.

BTW:

On second day christmas (using java version with macros) I solved 3^4 in 18 minutes 29.24 sec

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Jesse wrote:

So here is an interesting question.
On a 3d cube, you can generate a "checkerboard" pattern by rotating all 3 middle slices 180°, looking like Fig 1.
Can anyone else guess how to do this on a 4d cube? See Fig 2.
Furthermore, is there an analog to the Superflip in 4d?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Fig2. Hmmm, I did this in 40 moves -> http://www.superliminal.com/cube/3checkerboard-40.log
-?there is whole category with this in Hall of Fame

Fig.1 (in 3D) we change 2C pieces.
Fig.2 (in 4D) we change 3C pieces.

2C - two colored pieces
3C -three colored pieces

I cannot think about 3D analog of Melinda’s superflip… Flip of 1C? :) or just flip of 2C on 3x3x3 ?

Keep hypersolving!

Take care all you people,

REMIQ

OH, MELINDA -> we found with Kirfo reason of my problems with macros on 2^4! It was reference sticers. I choose 3 different pieces on one "face"(Actually on the one surface of the face) but program took them as the one piece!

———————————————————————-
Jestes kierowca? To poczytaj! >>> http://link.interia.pl/f199e