Thread: "MagicTile few colors"

From: qqwref@yahoo.com
Date: 18 Nov 2016 17:49:25 -0800
Subject: Re: MagicTile few colors




From: qqwref@yahoo.com
Date: Sat, 19 Nov 2016 15:45:02 +0100
Subject: Re: MagicTile few colors



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Thanks very much for carefully communicating your thougths.
I never preassemble super-pieces. Perhaps I should learn it.

Concerning
{3,4} 4-Color Orbifold B F0:0:0.8 V0.8:0:0

I can't follow your instructions.
Even replaying carefully your 52-Twist solution. I can only see the effect =
of the first two twists: edges at home.
But afterward: no progress can be observed with for the tiny edge2 pieces j=
oining theire corner-piece.
I think your twists are "compacted" afterward so intermediate progress is n=
ot visible anymore.

I have solved once the 5x5x5 but I can't any similarity with=20
{3,4} 4-Color Orbifold B F0:0:0.8 V0.8:0:0.

Kind regards
Ed



----- Original Message -----=20
From: qqwref@yahoo.com [4D_Cubing]=20
To: 4D_Cubing@yahoogroups.com=20
Sent: Saturday, November 19, 2016 2:49 AM
Subject: [MC4D] Re: MagicTile few colors


=20=20=20=20

I also find 3-cycles on complex puzzles, although I am generally not very=
strict about what I try to find. The cycles do not need to be pure. I also=
don't try to find ways to orient puzzles, since I can usually either solve=
those with appropriate setup moves or by just doing two 3-cycles. Sometime=
s I find some unusual parity or orientation issues which I will figure out =
when they come up. Also, depending on the puzzle, I might solve a lot of pi=
eces by intuitively solving them into place, or I might reduce the puzzle i=
nto something simpler (which I did with the cube/octahedron Super Chops, wh=
ere my big first step was to build groups of pieces so I didn't need to use=
the edge twists anymore).

Here's an example of the nonpure cycle thing. Let's look at Dodecahedron =
E0:1:0.11, where we have corners, corner centers, edge centers, tiny center=
s, and middle centers. I'd solve the corners first, intuitively, since a mo=
ve is a 2-cycle. Then you can make an 8-move 3-cycle of corner centers that=
affects everything except corners and middle centers, but only corners are=
solved now, so it's OK. Then there's a 4-move 3-cycle of edge centers that=
also affects tiny centers and middle centers, but we haven't solved those =
yet so that's OK too. Now I have a 3-cycle of middle centers that affects t=
iny centers (again OK) and then the only pure 3-cycle algorithm, of tiny ce=
nters - that one is 14 moves.


For the puzzle you mentioned, {3,4} 4-Color Orbifold B F0:0:0.8 V0.8:0:0 =
on the program, I do puzzles of that type by doing the middle edges (very q=
uick) and then solving each vertex along with the surrounding 8 pieces. The=
re are only two distinct vertices here. You can think of each vertex's grou=
p as a "center" (corner) plus four "edges" (edge2 pieces) and four "corners=
" (centers). So then it's somewhat like 5x5x5 supercube centers. I built mo=
st of it intuitively, for instance making "blocks" of two solved "edges" wi=
th a solved "corner" in between. By about 32 moves it looks like I had ever=
ything solved except two "corners", although we can consider it a 3-cycle b=
ecause we have some identically colored "corners". Then I solved that 3-cyc=
le with an algorithm that roughly corresponds to the 3x3x3 algorithm: [R2 U=
' R2 U' R2 U2 R2, D']. Align the vertices and it's done.


--Michael

=20=20
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=EF=BB=BF




Thanks very much for carefully communicati=
ng your=20
thougths.

I never preassemble super-pieces. Perhaps =
I should=20
learn it.

 

Concerning

{3,4} 4-Color Orbifold B F0:0:0.8=20
V0.8:0:0

 

I can't follow your instructions.DIV>
Even replaying carefully your 52-Twist sol=
ution. I=20
can only see the effect of the first two twists: edges at home.
>
But afterward: no progress can be observed=
with for=20
the tiny edge2 pieces joining theire corner-piece.

I think your twists are "compacted" afterw=
ard so=20
intermediate progress is not visible anymore.

 

I have solved once the 5x5x5 but I can't a=
ny=20
similarity with=20
{3,4} 4-Color Orbifold B F0:0:0.8=20
V0.8:0:0.

 

Kind regards

Ed

 

 

 

style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: =
0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
----- Original Message -----

style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black">Fro=
m:
=20
href=3D"mailto:qqwref@yahoo.com [4D_Cubing]">qqwref@yahoo.com [4D_Cubing]=
=20

To: ps.com=20
href=3D"mailto:4D_Cubing@yahoogroups.com">4D_Cubing@yahoogroups.com
<=
/DIV>
Sent: Saturday, November 19, 2016 =
2:49=20
AM

Subject: [MC4D] Re: MagicTile few=
=20
colors


 =20


I also find 3-cycles on complex puzzles, although I am generally not=
very=20
strict about what I try to find. The cycles do not need to be pure. I als=
o=20
don't try to find ways to orient puzzles, since I can usually either solv=
e=20
those with appropriate setup moves or by just doing two 3-cycles. Sometim=
es I=20
find some unusual parity or orientation issues which I will figure out wh=
en=20
they come up. Also, depending on the puzzle, I might solve a lot of piece=
s by=20
intuitively solving them into place, or I might reduce the puzzle into=20
something simpler (which I did with the cube/octahedron Super Chops, wher=
e my=20
big first step was to build groups of pieces so I didn't need to use the =
edge=20
twists anymore).

Here's an example of the nonpure cycle thing. Let=
's=20
look at Dodecahedron E0:1:0.11, where we have corners, corner centers, ed=
ge=20
centers, tiny centers, and middle centers. I'd solve the corners first,=20
intuitively, since a move is a 2-cycle. Then you can make an 8-move 3-cyc=
le of=20
corner centers that affects everything except corners and middle centers,=
but=20
only corners are solved now, so it's OK. Then there's a 4-move 3-cycle of=
edge=20
centers that also affects tiny centers and middle centers, but we haven't=
=20
solved those yet so that's OK too. Now I have a 3-cycle of middle centers=
that=20
affects tiny centers (again OK) and then the only pure 3-cycle algorithm,=
of=20
tiny centers - that one is 14 moves.


For the puzzle you mentioned, {3,4} 4-Color Orbifold B F0:=
0:0.8=20
V0.8:0:0 on the program, I do puzzles of that type by doing the midd=
le=20
edges (very quick) and then solving each vertex along with the surroundin=
g 8=20
pieces. There are only two distinct vertices here. You can think of each=
=20
vertex's group as a "center" (corner) plus four "edges" (edge2 pieces) an=
d=20
four "corners" (centers). So then it's somewhat like 5x5x5 supercube cent=
ers.=20
I built most of it intuitively, for instance making "blocks" of two solve=
d=20
"edges" with a solved "corner" in between. By about 32 moves it looks lik=
e I=20
had everything solved except two "corners", although we can consider it a=
=20
3-cycle because we have some identically colored "corners". Then I solved=
that=20
3-cycle with an algorithm that roughly corresponds to the 3x3x3 algorithm=
: [R2=20
U' R2 U' R2 U2 R2, D']. Align the vertices and it's done.


--Michael



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