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### This Challengeable Spaceships are Can be Synthesised?

Posted: December 12th, 2013, 3:07 am
According to recent discoveries, C/2 Orth, 2C/5 Orth, C/7 Orth, C/12 Diag (C/4 Diag is used to synthesis objects)
Spaceships are can be Synthesised like following two Examples.

Example1 : Synthesizable 2C/5 Spaceship

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``````x = 11, y = 19, rule = B3/S23
4b3o\$4bo2b3o\$4b5o\$7b2o\$2o\$obo\$ob2o3bo\$bo6bobo\$2b7obo2\$2b7obo\$bo6bobo\$o
b2o3bo\$obo\$2o\$7b2o\$4b5o\$4bo2b3o\$4b3o!
``````
This 2C/5 Spaceship is look synthesizable.
As you know, The mirrored one have It's Synthesis Recipe.

Example2 : skomick's Synthesis Recipe of Loafer using 8 Gliders

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``````x = 34, y = 31, rule = B3/S23
bo\$2bo\$3o2\$23bobo\$23b2o6bobo\$24bo6b2o\$32bo3\$27bobo\$27b2o\$7bo20bo\$7bobo
\$7b2o2\$6bo\$4bobo\$bo3b2o\$b2o\$obo8\$26b3o\$26bo\$27bo!
``````
And this is a C/7 Orthogonal Spaceship discovered recently.
It's made up of 3 small parts. Loaf, Hat-like figure, and so on.
What's the Topic I saying is The C/3 Spaceships and others are can be Synthesised?
All of you thinks it 'Impossible', But I found Challengeable One.

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``````x = 9, y = 15, rule = LifeHistory
7.D\$6.D.D\$5.D2.D\$6.D\$5.4D\$2.B.2D.D\$2B4.3D\$2B\$2B4.3D\$2.B.2D.D\$5.4D\$6.D
\$5.D2.D\$6.D.D\$7.D!
``````
The Triangle like Spaceship is 'Dart', Blue part is not a problem. We just have to solve Mirrored Reddish Part.
If We finished to solve that Red, The 'Dart' Now Can be a Synthesizable Pattern.
Not only Orthogonal C/3 Spaceships but also Anothers can be Glider-Craftable.

P.S. I used a translate program to write this letters and Can't speak English so well...
So, Too many grammatical errors are can be exist.

### Re: Can This Challengeable Spaceships are Synthesised?

Posted: December 12th, 2013, 3:09 am
Not everyone speaks English fluently. Please do not disparage anyone's writing on these forums.

-Sokwe

### Re: Can This Challengeable Spaceships are Synthesised?

Posted: December 12th, 2013, 8:15 am
The dart is indeed a good candiadte for a synthesis. Another fo me is the "weekender" because it's motor is easy to create (2 TLs)

### Re: Can This Challengeable Spaceships are Synthesised?

Posted: December 12th, 2013, 7:33 pm
Freywa wrote:(comment removed)
While the grammar is definitely bad enough that it is very hard for native English speakers to understand, it's probably a good idea not to be too harsh about it as kiho park does not appear to be a native English speaker (the grammar is like if run through an automatic translator, so suggesting that probably won't help.) Remember, English grammar is very different from in Spanish, French, etc.

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 27th, 2013, 1:40 pm
I always hoped that this one (the ü-tag)could be synthesized:

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``````x = 14, y = 27, rule = B3/S23
8\$4b2obo\$b3o3bo\$bo\$bo6bo\$2b3o3bo\$5b2o3\$7b2o\$6b2ob3o\$7b5o\$8b3o!
``````
I had a near miss with building the engine from two colliding pis, but can't find that anymore! It looks so close to pi or b-heptomino development.

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 29th, 2013, 8:37 pm
HartmutHolzwart wrote:I always hoped that this one (the ü-tag)could be synthesized: ...
I had a near miss with building the engine from two colliding pis, but can't find that anymore! It looks so close to pi or b-heptomino development.
I've tried to synthesize this one a few times, without any success (or even any near misses). It's one of the small c/2 tag-alongs that looks like it might possibly have some promise. I've seen some of the larger c/2 spaceships on pentadecathlon.com, that look like mutated LWSS/MWSS/HWSS engines that might also be possible, but others where there are two front sections, but no clear separation between the rear parts. Those would likely be very difficult to synthesize, at least using any conventional methods.

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 30th, 2013, 4:27 am
I guess the synthesis difficulty is more movement-based than size-based: the more still-like parts a ship has, hte easier it is to synthetise it.
This is why the loafer was so easy: it is at the same time very small and quite still...
One of the smallest c/4 which has a "stable' part:

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``````x = 30, y = 15, rule = B3/S23
\$12b2o4bo\$11bob2ob2ob2obo\$2bo2bo2bobo5b5o\$2bo2bobob2obobobob7o\$b2o19bo
bo2b2o\$2bob2ob9o10bo\$2bo\$2bob2ob9o10bo\$b2o19bobo2b2o\$2bo2bobob2obobobo
b7o\$2bo2bo2bobo5b5o\$11bob2ob2ob2obo\$12b2o4bo!
``````
sadly, it is kinda large, so I may be ambitious...

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 30th, 2013, 7:38 am
If one looks at existing syntheses of space ships, then there are actually two sources:

1) Those that can be synthesized from "common constellations", i.e. b-heptomino, pi or similar (most of the c/2 tags and *WSS variants)

2) Those that have a stable predecessor (i.e. the 2c/5 and the loafer).

How would you address the synthesis? Why should this one be especially promising?

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 31st, 2013, 7:31 pm
HartmutHolzwart wrote:How would you address the synthesis? Why should this one be especially promising?
I've made a few attempts at synthesizing the Dart myself (so far, without success). It is like the 2c/5, in that the rear part closely resembles a de-stabilized still-life (which could hopefully be synthesized by starting with the still-life, then mangling it in place), and the front part is a honeyfarm predecessor, which is also easily synthesized.

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 8th, 2014, 5:12 pm
Now that the dart is finally synthezised, what is the next challenge/candidate?

I think I saw a large part of my ü tag in a collision of two pies.

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 8th, 2014, 5:19 pm
Here is my collection of what looks not beyond the reach for synth:

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``````x = 123, y = 22, rule = B3/S23
7\$10bo11bo16bo11bo\$10bo11bo14b4o9b4o8b3o10b3o\$9bobo9bobo12b2o2bo9bo2b
2o6bo3bo8bo3bo14b3o15b3o\$35bo2b4o3bo3b4o2bo36bo3bo13bo3bo\$8bo3bo7bo3bo
10bo4b3obobob3o4bo9bo8bo16b2o4bo11bo4b2o\$8bob6ob6obo15bo3bobo3bo10bo7b
2o7bo11bobob2ob2o3b3o3b2ob2obobo\$7bo7bobo7bo9b3o6bobo6b3o7b3o2bo2bo2b
3o12b2obo4bob2ob3ob2obo4bob2o\$7bo7bobo7bo18bobo17b2ob2o2b2ob2o12bo4bo
3bo4bobo4bo3bo4bo\$7bo17bo15b2obobob2o50bo5bo\$8bob2ob2o3b2ob2obo16b2obo
bob2o38b2o7b2o9b2o7b2o\$43b2ob2o18b8o\$43bo3bo19bob2obo\$44bobo\$43bo3bo!
``````

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 8th, 2014, 8:57 pm
simsim314 wrote:Here is my collection of what looks not beyond the reach for synth...
Of this list, the p2 spaceship looks maybe less likely than the others. Might it be narrow enough that some kind of long line of sparks could attack a construction site from both sides? I don't know. It's pretty quick and active, so once it gets going it will be hard to keep up with, to make any final adjustments...!

Sokwe also mentioned the c/4 diagonal crab, which does seem like a likely target. Do we have a likely glider-turning reaction that can drop those gliders in in front of (a predecessor of) the crab tagalong?

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``````#C Crab -- Jason Summers, September 2000.
#C The smallest known diagonal spaceship other than the glider. Period 4, speed c/4.
x = 13, y = 12, rule = B3/S23
8b2o3b\$7b2o4b\$9bo3b\$11b2o\$10bo2b2\$9bo2bo\$b2o5b2o3b\$2o5bo5b\$2bo4bobo3b\$
4b2o2bo4b\$4b2o!``````

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 9th, 2014, 5:04 am
dvgrn wrote:Do we have a likely glider-turning reaction that can drop those gliders in in front of (a predecessor of) the crab tagalong?
I don't think that this is a good approach. I guess it's better to synthesize this as a whole:

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``````x = 6, y = 5, rule = B3/S23
b2o\$2o\$2bo\$4b2o\$4b2o!
``````
And then add the missing part in the middle.

Anyway here is one of the best in front placers:

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``````x = 53, y = 60, rule = B3/S23
9\$45bo\$43b2o\$44b2o21\$27bo\$26bobo\$27bobo\$28bo6\$26b2o\$25bobo\$24bobo\$25bo
4b3o\$30bo\$31bo!
``````
And it's just not good enough...I guess there might be something better, but as a whole I don't think the in-front inserter is the best approach here.

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 9th, 2014, 8:28 am
simsim314 wrote:...here is one of the best in front placers:

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``````x = 53, y = 60, rule = B3/S23
9\$45bo\$43b2o\$44b2o21\$27bo\$26bobo\$27bobo\$28bo6\$26b2o\$25bobo\$24bobo\$25bo
4b3o\$30bo\$31bo!
``````
And it's just not good enough...I guess there might be something better, but as a whole I don't think the in-front inserter is the best approach here.
Something better was posted by knightlife several years back:

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``````#C tumbler-mediated glider placement, T=11 through 14, H=0
#C where H is horizontal lane offset, T=number of ticks advanced
#C (Stop running after 20 ticks, since T=11-13 are too close at H=0)
x = 102, y = 17, rule = B3/S23
84bo\$o27bo24bobo29bo\$b2o23bobo25b2o27b3o\$2o25b2o25bo\$31bo25bo30bo\$3bob
o26bo25b2o26bobo\$4b2o24b3o24b2o28b2o\$4bo2\$15b3o24b3o24b3o27b3o\$12b2o3b
o21b2o3bo21b2o3bo24b2o3bo\$12b5o22b5o22b5o25b5o2\$12b5o22b5o22b5o25b5o\$
7bobo2b2o3bo16bobo2b2o3bo16bobo2b2o3bo19bobo2b2o3bo\$8b2o5b3o17b2o5b3o
17b2o5b3o20b2o5b3o\$8bo26bo26bo29bo!``````
There must be equivalent reactions starting with still lifes, though they may be hard to find.

But that doesn't make it easy to synthesize the unstable block+glider combination, because the tumbler-to-glider produces gliders in the other phase, and the usual block recipes don't happen to produce a preblock with the missing bit in the right place. (I think).

No doubt there's an appropriate preblock recipe available, *WSS+G if nothing else, quite possibly even without any tumbler-type glider insertion trick... but is there room for the same block+glider construction reaction on both sides plus a recipe for the central spark? I'm a bit worried about that "add the missing part in the middle"...!

### Re: This Challengeable Spaceships are Can be Synthesised?

Posted: December 10th, 2014, 4:46 pm
dvgrn wrote:There must be equivalent reactions starting with still lifes, though they may be hard to find.
With my 4K reflectors (which I think is very partial anyway), there is only one interaction that supports 14 ticks in-front inseters (this includes 180 degree turners and lane switchers):

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``````x = 151, y = 41, rule = B3/S23
23bo\$22bo\$22b3o12\$148bobo\$148b2o\$6b2o141bo\$5bobo2b2o\$5b2o3bobo\$3b2o5bo
\$2bobo\$2b2o3\$b2o\$o2bo\$bobo\$2bo2\$132b2o\$131bobo2b2o\$131b2o3bobo\$129b2o
5bo\$128bobo\$128b2o3\$127b2o\$126bo2bo\$127bobo\$128bo!``````
I will post more results for 15 ticks and back inserters in the Splitters thread.

EDIT See here