Solved 3^4 second time. 447 twists. Twice better than first time, but still=
long way down to 300...
If this is only your second solve, then you're doing amazingly well and
I could easily imagine you getting into the 300 zone. Sounds strange for
me to say that because it wasn't that long ago that I could never
imagine anyone getting that low, but after Roice's tour-de-force I don't
make assumptions like that anymore!
BTW, who are you? I don't see you listed in the hall-of-fame.
-Melinda
Andrey wrote:
> Solved 3^4 second time. 447 twists. Twice better than first time, but still long way down to 300...
Hi Melina and all!
I also can't find myself in hall-of-fame list. I have sent log of the fir=
st solve to MagicCube4D@Superliminal.com but probably it was lost somewhere=
. Actually it was not the first my solve...
I'm Andrey Astrelin from Moscow. Now I work in Moscow State University an=
d also take part in delevoping of 3D laser scanner (Surphaser).=20
First time I saw Rubic's cube around 1982 and learned to solve it. Then t=
here were tetrahendron and dodecahenron (Megaminx? It was in 1984). In 1985=
(my second year in Mathematical dept. of MSU) I first time saw the compute=
r - it was PDP 11/70 with operation system RSX (or RSL? Don't remember). An=
d my programming experience begun.
My first 4D game was, of course, rubic's cube 3x3x3x3. It was on text ter=
minal (we had no graphic terminals), with 4 visible faces and colours coded=
by letters A,B,...,H. And with keyboard input (no macros). I've scrambled =
it and solved. Once. Scrambled second time, made some twists, said "I know =
that I can do it anytime" and switched for other projects. As far as I reme=
mber it was in 1987.
Second 4D game was tetris. Position was shown in very simple graphics as =
orthogonal view from the top, with colour-coded height of each column. I ha=
ve a version of this tetris written in C# somewhere on my computer, but now=
no time to play with it.
Some time ago I thought about rewrting on 3^4 cube, but tried to search f=
or something like that on the web - and found MC4D. Solving of 3^4 took one=
day, without any macros and studying of algorithms. Then I spent some week=
s trying to adapt some algorithm for 3^3 (my average result for 3^3 is 44 t=
wists) to 3^4, but without success. Now I'm working on another way to solve=
it...
Andrey,
My bad for not processing your solution earlier. I found it buried in my
in-box and have added your name to the HOF with the nice solver number 123.
Where did that 1987 implementation of the 4D cube come from? We will all
be very interested in any information you can find or relate about it.
4D Tetris sounds very interesting. I remember playing with a 3D version
that a coworker wrote around that same time but it's funny that a 4D
version never occurred to me. The pieces would need to move *very*
slowly. I once did a simple Java Applet version of the original 2D game
here: http://www.superliminal.com/tetris/Tetris.htm It is a rewrite of a
version from a student I had in a Java class that I once taught.
Your progress with the 4D cube is impressive. Actually, all of your
accomplishments are very impressive. I am expecting great things from
you! :-)
-Melinda
Andrey wrote:
> Hi Melina and all!
>
> I also can't find myself in hall-of-fame list. I have sent log of the first solve to MagicCube4D@Superliminal.com but probably it was lost somewhere. Actually it was not the first my solve...
>
> I'm Andrey Astrelin from Moscow. Now I work in Moscow State University and also take part in delevoping of 3D laser scanner (Surphaser).
> First time I saw Rubic's cube around 1982 and learned to solve it. Then there were tetrahendron and dodecahenron (Megaminx? It was in 1984). In 1985 (my second year in Mathematical dept. of MSU) I first time saw the computer - it was PDP 11/70 with operation system RSX (or RSL? Don't remember). And my programming experience begun.
> My first 4D game was, of course, rubic's cube 3x3x3x3. It was on text terminal (we had no graphic terminals), with 4 visible faces and colours coded by letters A,B,...,H. And with keyboard input (no macros). I've scrambled it and solved. Once. Scrambled second time, made some twists, said "I know that I can do it anytime" and switched for other projects. As far as I remember it was in 1987.
> Second 4D game was tetris. Position was shown in very simple graphics as orthogonal view from the top, with colour-coded height of each column. I have a version of this tetris written in C# somewhere on my computer, but now no time to play with it.
> Some time ago I thought about rewrting on 3^4 cube, but tried to search for something like that on the web - and found MC4D. Solving of 3^4 took one day, without any macros and studying of algorithms. Then I spent some weeks trying to adapt some algorithm for 3^3 (my average result for 3^3 is 44 twists) to 3^4, but without success. Now I'm working on another way to solve it...
Melinda,
Implementation of 3^4 at 1987 I wrote myself, in C, and it was never expo=
rted from PDP (there was even no such thing as a diskette on that machine).=
And I didn't print source code (didn't see any reason for that). So progra=
m was written, puzzle solved and forgotten for decades.
As for 4D tetris, pieces don't fall down there at all. May be once I've c=
ompleted 10 layers in 3x3x3-pentablock game and 1 or 2 layers in 4x4x4-hexa=
block. Didn't try to play in it seriously.
In the early 1990s there was 3D tetris game on PC (called "Blockout": htt=
p://en.wikipedia.org/wiki/Blockout ). I remember we played it a lot that ti=
me, and may be that was a game that inspired my 4D tetris attempt.=20
Later I tried to write some more 3D and 4D games (like labirynths in non-=
eucldiean fields), but I don't like graphic programming (and GUI design), s=
o there was no finished program in that direction :(
Andrey
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Youshi, welcome to the group and sorry nobody replied to your first post!
How did you solve the 4x4x4x4, were the algorithms & parity issues similar
to the 3-dimensional 4x4x4? Congratulations!
P.S. What is your favourite Vernor Vinge? (I started with "Rainbows End"
and then read his short story "True Names" which was incredibly visionary.
Then "Fire Upon the Deep" & "Deepness in the Sky" but not yet the 3rd
part. Also need to read "Peace War" hmmm... you've given me a serious
sci-fi craving.)
If you liked Vinge's Rainbows End, I hope you read William Gibson's
"Neuromancer", and Neal Stephenson's "Snow Crash" -- both cult classics now=
.
On Sat, Jul 19, 2014 at 4:56 PM, Youshi Sun sunyoushi@yahoo.com [4D_Cubing]
<4D_Cubing@yahoogroups.com> wrote:
>
>
> Hello Guys,
> My name is Youshi Sun (Sun Youshi in Chinese spelling), and you can call
> me leonard if you want.
> I am living in Beijing, China.
> I am 36 years old.
> I am an engineer in aerospace industry.
> I have an good interest in mathematics and physics.
> I love sci-fi. My favorite writer is Verno Vinge.
> I like movies, especially sci-fi movies.
> MC4D is an amazing game program, I like it very much.
> I have just done the 4 by 4 by 4 by 4, and was so excited.
>
>=20=20
>
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