Construction Challenges and Ideas

[LuveelVoom]

Do you mean a shuttle where the active region is self-constructing?

[dvgrn]

I mean, a constructed shuttle that construct itself at different place with different orientation before self-destructing. More like a meta-pattern.

So, a self-constructing pattern similar to an engineered RRO, except that the transformation is a mirror reflection instead of a 90- or 180-degree rotation?

I don't think an example of a "reflectorless mirror-reflecting oscillator" (RMRO?) (EDIT: wait, no, they've been called "reflectorless flipping oscillators" probably more than anything else) has been built yet, but the design would be very similar to existing B3/S23 RROs and/or self-synthesizing spaceships.

If someone wants to build one, I can help.

[CARuler]

Create a walrus reflector
This can be done using the walrus->Glider

[dvgrn]

Create a walrus reflector
This can be done using the walrus->Glider

Only if we also had a glider->walrus converter ... which would be straightforward to build, if only we had a glider synthesis recipe for walruses.

Is someone saving up a walrus recipe for April Fools' Day, or something like that?

[CARuler]

the converter (W->G) is on the wiki page
Walrus

[dvgrn]

the converter (W->G) is on the wiki page
Walrus

But ... to get a reflector, we need to start with a walrus and end with a walrus, right?

Minor side note: "W" tends to stand for "wing" and not "walrus" in conduit discussions.

This is basically because we don't know how to convert a signal back into a walrus once it turns into a glider (or anything else).

[confocaloid]

Create a walrus reflector
This can be done using the walrus->Glider

For a spaceship reflector that reflects a walrus, you would need either a direct reflection reaction, or two spaceship converters (a walrus-to-glider and a glider-to-walrus), or maybe some other unlikely pair of converters (from walrus to "something" and from that "something" to walrus) where "something" is a moving object that has no known way of converting to/from the glider.

As a possible first step, I think it would be interesting to see a glider-to-walrus spaceship converter in StateInvestigator (which is no longer CGoL, but it's based on CGoL). If anyone finds a device heavily relying on higher-numbered cellstates that would be interesting, but probably would be hard ot impossible to make it work in plain CGoL. The fewer cells with cellstates other than 0 or 1 and the more parts of reactions "looking like CGoL syntheses", the more likely it would be that it will be possible to make it work in plain CGoL with some efforts.

(IMO, any glider-to-walrus spaceship converter in StateInvestigator would be much more 'interesting', compared to the many examples of easily-constructed oscillators relying on higher-numbered cellstates.)

[Jormungant]

I have this "forcefield" Challenge. If completed, it would be It is a near-miss solution to the problem proposed in 1992 by Allan Wechsler:

15. Does there exist a finite stable pattern which can defend itself
against any single glider?

Code: Select all

x = 429, y = 547, rule = LifeHistory
7.148BD$7.149BD$7.150BD$7.151BD$7.152BD$7.153BD$7.154BD$7.155BD$7.
156BD$7.157BD$7.158BD$7.159BD$7.160BD$7.161BD$7.162BD$7.163BD$7.164BD
$7.165BD$7.166BD$7.167BD$7.168BD$7.169BD$7.170BD$7.171BD$7.172BD$7.
173BD$7.174BD$7.175BD$7.176BD$7.177BD$7.178BD$7.179BD$7.180BD$7.181BD
$7.182BD$7.183BD$7.184BD$7.185BD$7.186BD$7.187BD$7.188BD$7.189BD$7.
190BD$7.191BD$7.192BD$7.193BD$7.194BD$7.195BD$7.196BD$7.197BD$7.198BD
$7.199BD$7.200BD$7.201BD$7.202BD$7.203BD$7.204BD$7.205BD70.2A.2A$7.
206BD70.A.A$7.207BD69.A.A$7.208BD67.2A.2A$7.209BD67.A.A$7.210BD66.A.A
3.2A$7.211BD64.2A.2A.A.A$7.212BD64.A.A3.A$7.213BD63.A.A$7.214BD61.2A.
2A$7.215BD61.A.A$7.216BD60.A.A$7.217BD58.2A.2A$7.218BD58.A.A$7.219BD
57.A.A$7.220BD55.2A.2A$7.221BD55.A.A$7.222BD54.A.A$7.223BD52.2A.2A$7.
224BD52.A.A$7.225BD51.A.A$7.226BD49.2A.2A$7.227BD49.A.A$7.228BD48.A.A
$7.229BD46.2A.2A$7.230BD46.A.A$7.231BD45.A.A$7.232BD43.2A.2A$7.233BD
43.A.A$7.234BD42.A.A$7.235BD40.2A.2A$7.236BD40.A.A$7.237BD39.A.A$7.
238BD37.2A.2A$7.239BD37.A.A$7.240BD36.A.A$7.241BD34.2A.2A$7.242BD34.A
.A$7.243BD33.A.A$7.244BD31.2A.2A$7.245BD31.A.A$7.246BD30.A.A$7.247BD
28.2A.2A$7.248BD28.A.A$7.249BD27.A.A$7.250BD25.2A.2A$7.251BD25.A.A$7.
252BD24.A.A$7.253BD22.2A.2A$7.254BD22.A.A$7.255BD21.A.A$7.256BD19.2A.
2A$7.257BD19.A.A$7.258BD18.A.A$7.259BD16.2A.2A$7.260BD16.A.A$7.261BD
15.A.A$7.262BD13.2A.2A$7.263BD13.A.A$7.264BD12.A.A$7.265BD10.2A.2A$7.
266BD10.A.A$7.267BD9.A.A$7.268BD7.2A.2A$7.269BD7.A.A$7.270BD6.A.A$7.
271BD4.2A.2A$7.272BD4.A.A$7.273BD3.A.A$7.272BDBD.2A.2A$7.271BD3BD.A.A
$7.270BD5BDA.A$7.269BD6B2A.2A$7.268BD8BADA$7.267BD9BABA$7.266BD9B2AB
2A$7.265BD11BABABD$7.264BD12BABA2BD$7.263BD12B2AB2A2BD$7.262BD14BABA
4BD$7.261BD15BABA5BD$7.260BD15B2AB2A5BD$7.259BD17BABA7BD$7.258BD18BAB
A8BD$D6.257BD18B2AB2A8BD$.D5.256BD20BABA10BD$2.D4.255BD21BABA11BD$3.D
3.254BD21B2AB2A11BD$4.D2.253BD23BABA13BD$5.D.252BD24BABA14BD$6.D251BD
24B2AB2A14BD$7.D249BD26BABA16BD$8.D247BD27BABA17BD$9.D245BD27B2AB2A
17BD$10.D243BD29BABA19BD$11.D241BD30BABA20BD$12.D239BD30B2AB2A20BD$
13.D237BD32BABA22BD$14.D235BD33BABA23BD$15.D233BD33B2AB2A23BD$16.D
231BD35BABA25BD$17.D229BD36BABA26BD$18.D227BD36B2AB2A26BD$19.D225BD
38BABA28BD$20.D223BD39BABA29BD$21.D221BD39B2AB2A29BD$22.D219BD41BABA
31BD$23.D217BD42BABA32BD$24.D215BD42B2AB2A32BD$25.D213BD44BABA34BD$
26.D211BD45BABA35BD$27.D209BD45B2AB2A35BD$28.D207BD47BABA37BD$29.D
205BD48BABA38BD$30.D203BD48B2AB2A38BD$31.D201BD50BABA40BD$32.D199BD
51BABA41BD$33.D197BD51B2AB2A41BD$34.D195BD53BABA43BD$35.D193BD54BABA
44BD$36.D191BD54B2AB2A44BD$37.D189BD56BABA46BD$38.D187BD57BABA47BD$
39.D185BD57B2AB2A47BD$40.D183BD59BABA49BD$41.D181BD60BABA50BD$42.D
179BD60B2AB2A50BD67.A$43.D177BD62BABA52BD65.A.A$44.D175BD63BABA53BD
64.2A$45.D173BD63B2AB2A53BD$46.D171BD65BABA55BD$47.D169BD66BABA56BD$
48.D167BD66B2AB2A56BD$49.D165BD68BABA58BD$50.D163BD69BABA59BD$51.D
161BD69B2AB2A59BD$52.D159BD71BABA61BD$53.D157BD72BABA62BD$54.D155BD
72B2AB2A62BD$55.D153BD74BABA64BD$56.D151BD75BABA65BD$57.D149BD75B2AB
2A65BD$58.D147BD77BABA67BD$59.D145BD78BABA68BD$60.D143BD78B2AB2A68BD$
61.D141BD80BABA70BD$62.D139BD81BABA71BD$63.D137BD81B2AB2A71BD$64.D
135BD83BABA73BD$65.D133BD84BABA74BD$66.D131BD84B2AB2A74BD$67.D129BD
86BABA76BD$68.D127BD87BABA77BD$69.D125BD87B2AB2A77BD$70.D123BD89BABA
79BD$71.D121BD90BABA80BD$72.D119BD90B2AB2A80BD$73.D117BD92BABA82BD$
74.D115BD93BABA83BD$75.D113BD93B2AB2A83BD$76.D111BD95BABA85BD$77.D
109BD96BABA86BD$78.D107BD96B2AB2A86BD$79.D105BD98BABA88BD$80.D103BD
99BABA89BD$81.D101BD99B2AB2A89BD$82.D99BD101BABA91BD$83.D97BD102BABA
92BD$84.D95BD102B2AB2A92BD$85.D93BD104BABA94BD$86.D91BD105BABA95BD$
87.D89BD105B2AB2A95BD$88.D87BD107BABA97BD$89.D85BD108BABA98BD$90.D83B
D108B2AB2A98BD$91.D81BD110BABA100BD$92.D79BD111BABA101BD$93.D77BD111B
2AB2A101BD$94.D75BD113BABA103BD$95.D73BD53BA60BABA104BD$96.D71BD55BA
58B2AB2A104BD$97.D69BD54B3A59BABA106BD$98.D67BD117BABA107BD$99.D65BD
117B2AB2A107BD$100.D63BD119BABA109BD$101.D61BD120BABA110BD$102.D59BD
120B2AB2A110BD$103.D57BD122BABA112BD$104.D55BD123BABA113BD$105.D53BD
123B2AB2A113BD$106.D51BD125BABA115BD$107.D49BD126BABA116BD$108.D47BD
126B2AB2A116BD$109.D45BD128BABA118BD$110.D43BD129BABA119BD$111.D41BD
129B2AB2A119BD$112.D39BD131BABA121BD$113.D37BD132BABA122BD$114.D35BD
132B2AB2A122BD$115.D33BD134BABA124BD$116.D31BD135BABA125BD$117.D29BD
135B2AB2A125BD$118.D27BD137BABA127BD$119.D25BD138BABA128BD$120.D23BD
138B2AB2A128BD$121.D21BD140BABA130BD$122.D19BD141BABA131BD$123.D17BD
141B2AB2A131BD$124.D15BD143BABA133BD$125.D13BD144BABA134BD$126.D11BD
144B2AB2A134BD$127.D9BD146BABA136BD$128.D7BD147BABA137BD$129.D5BD147B
2AB2A137BD$130.D3BD149BABA139BD$131.DBD150BABA140BD$132.D150B2AB2A
140BD$131.DBD150BABA140BD$130.D3BD149BABA139BD$129.D5BD147B2AB2A137BD
$128.D7BD147BABA137BD$127.D9BD146BABA136BD$126.D11BD144B2AB2A134BD$
125.D13BD144BABA134BD$124.D15BD143BABA133BD$123.D17BD141B2AB2A131BD$
122.D19BD141BABA131BD$121.D21BD140BABA130BD$120.D23BD138B2AB2A128BD$
119.D25BD138BABA128BD$118.D27BD137BABA127BD$117.D29BD135B2AB2A125BD$
116.D31BD135BABA125BD$115.D33BD134BABA124BD$114.D35BD132B2AB2A122BD$
113.D37BD132BABA122BD$112.D39BD131BABA121BD$111.D41BD129B2AB2A119BD$
110.D43BD129BABA119BD$109.D45BD128BABA118BD$108.D47BD126B2AB2A116BD$
107.D49BD126BABA116BD$106.D51BD125BABA115BD$105.D53BD123B2AB2A113BD$
104.D55BD123BABA113BD$103.D57BD122BABA112BD$102.D59BD120B2AB2A110BD$
101.D61BD120BABA110BD$100.D63BD119BABA109BD$99.D65BD117B2AB2A107BD$
98.D67BD117BABA107BD$97.D69BD116BABA106BD$96.D71BD114B2AB2A104BD$95.D
73BD114BABA104BD$94.D75BD113BABA103BD$93.D77BD111B2AB2A101BD$92.D79BD
111BABA101BD$91.D81BD110BABA100BD$90.D83BD108B2AB2A98BD$89.D85BD108BA
BA98BD$88.D87BD107BABA97BD$87.D89BD105B2AB2A95BD$86.D91BD105BABA95BD$
85.D93BD104BABA94BD$84.D95BD102B2AB2A92BD$83.D97BD102BABA92BD$82.D99B
D101BABA91BD$81.D101BD99B2AB2A89BD$80.D103BD99BABA89BD$79.D105BD98BAB
A88BD$78.D107BD96B2AB2A86BD$77.D109BD96BABA86BD$76.D111BD95BABA85BD$
75.D113BD93B2AB2A83BD$74.D115BD93BABA83BD$73.D117BD92BABA82BD$72.D
119BD90B2AB2A80BD$71.D121BD90BABA80BD$70.D123BD89BABA79BD$69.D125BD
87B2AB2A77BD$68.D127BD87BABA77BD$67.D129BD86BABA76BD$66.D131BD84B2AB
2A74BD$65.D133BD84BABA74BD$64.D135BD83BABA73BD$63.D137BD81B2AB2A71BD$
62.D139BD81BABA71BD$61.D141BD80BABA70BD$60.D143BD78B2AB2A68BD$59.D
145BD78BABA68BD$58.D147BD77BABA67BD$57.D149BD75B2AB2A65BD$56.D151BD
75BABA65BD$55.D153BD74BABA64BD$54.D155BD72B2AB2A62BD$53.D157BD72BABA
62BD$52.D159BD71BABA61BD$51.D161BD69B2AB2A59BD$50.D163BD69BABA59BD$
49.D165BD68BABA58BD$48.D167BD66B2AB2A56BD$47.D169BD66BABA56BD$46.D
171BD65BABA55BD$45.D173BD63B2AB2A53BD$44.D175BD63BABA53BD64.2A$43.D
177BD62BABA52BD65.A.A$42.D179BD60B2AB2A50BD67.A$41.D181BD60BABA50BD$
40.D183BD59BABA49BD$39.D185BD57B2AB2A47BD$38.D187BD57BABA47BD$37.D
189BD56BABA46BD$36.D191BD54B2AB2A44BD$35.D193BD54BABA44BD$34.D195BD
53BABA43BD$33.D197BD51B2AB2A41BD$32.D199BD51BABA41BD$31.D201BD50BABA
40BD$30.D203BD48B2AB2A38BD$29.D205BD48BABA38BD$28.D207BD47BABA37BD$
27.D209BD45B2AB2A35BD$26.D211BD45BABA35BD$25.D213BD44BABA34BD$24.D
215BD42B2AB2A32BD$23.D217BD42BABA32BD$22.D219BD41BABA31BD$21.D221BD
39B2AB2A29BD$20.D223BD39BABA29BD$19.D225BD38BABA28BD$18.D227BD36B2AB
2A26BD$17.D229BD36BABA26BD$16.D231BD35BABA25BD$15.D233BD33B2AB2A23BD$
14.D235BD33BABA23BD$13.D237BD32BABA22BD$12.D239BD30B2AB2A20BD$11.D
241BD30BABA20BD$10.D243BD29BABA19BD$9.D245BD27B2AB2A17BD$8.D247BD27BA
BA17BD$7.D249BD26BABA16BD$7.251BD24B2AB2A14BD$7.252BD24BABA14BD$7.
253BD23BABA13BD$7.254BD21B2AB2A11BD$7.255BD21BABA11BD$7.256BD20BABA
10BD$7.257BD18B2AB2A8BD$7.258BD18BABA8BD$7.259BD17BABA7BD$7.260BD15B
2AB2A5BD$7.261BD15BABA5BD$7.262BD14BABA4BD$7.263BD12B2AB2A2BD$7.264BD
12BABA2BD$7.265BD11BABABD$7.266BD9B2AB2A$7.267BD9BABA$7.268BD8BADA$7.
269BD6B2A.2A$7.270BD5BDA.A$7.271BD3BD.A.A$7.272BDBD.2A.2A$7.273BD3.A.
A$7.272BD4.A.A$7.271BD4.2A.2A$7.270BD6.A.A$7.269BD7.A.A$7.268BD7.2A.
2A$7.267BD9.A.A$7.266BD10.A.A$7.265BD10.2A.2A$7.264BD12.A.A$7.263BD
13.A.A$7.262BD13.2A.2A$7.261BD15.A.A$7.260BD16.A.A$7.259BD16.2A.2A$7.
258BD18.A.A$7.257BD19.A.A$7.256BD19.2A.2A$7.255BD21.A.A$7.254BD22.A.A
$7.253BD22.2A.2A$7.252BD24.A.A$7.251BD25.A.A$7.250BD25.2A.2A$7.249BD
27.A.A$7.248BD28.A.A$7.247BD28.2A.2A$7.246BD30.A.A$7.245BD31.A.A$7.
244BD31.2A.2A$7.243BD33.A.A$7.242BD34.A.A$7.241BD34.2A.2A$7.240BD36.A
.A$7.239BD37.A.A$7.238BD37.2A.2A$7.237BD39.A.A$7.236BD40.A.A$7.235BD
40.2A.2A$7.234BD42.A.A$7.233BD43.A.A$7.232BD43.2A.2A$7.231BD45.A.A$7.
230BD46.A.A$7.229BD46.2A.2A$7.228BD48.A.A$7.227BD49.A.A$7.226BD49.2A.
2A$7.225BD51.A.A$7.224BD52.A.A$7.223BD52.2A.2A$7.222BD54.A.A$7.221BD
55.A.A$7.220BD55.2A.2A$7.219BD57.A.A$7.218BD58.A.A$7.217BD58.2A.2A$7.
216BD60.A.A$7.215BD61.A.A$7.214BD61.2A.2A$7.213BD63.A.A$7.212BD64.A.A
3.A$7.211BD64.2A.2A.A.A$7.210BD66.A.A3.2A$7.209BD67.A.A$7.208BD67.2A.
2A$7.207BD69.A.A$7.206BD70.A.A$7.205BD70.2A.2A$7.204BD$7.203BD$7.202B
D$7.201BD$7.200BD$7.199BD$7.198BD$7.197BD$7.196BD$7.195BD$7.194BD$7.
193BD$7.192BD$7.191BD$7.190BD$7.189BD$7.188BD$7.187BD$7.186BD$7.185BD
$7.184BD$7.183BD$7.182BD$7.181BD$7.180BD$7.179BD$7.178BD$7.177BD$7.
176BD$7.175BD$7.174BD$7.173BD$7.172BD$7.171BD$7.170BD$7.169BD$7.168BD
$7.167BD$7.166BD$7.165BD$7.164BD$7.163BD$7.162BD$7.161BD$7.160BD$7.
159BD$7.158BD$7.157BD$7.156BD$7.155BD$7.154BD$7.153BD$7.152BD$7.151BD
$7.150BD$7.149BD$7.148BD!

This pattern, if completed, would need to use stable circuitry acknowledge that the wall was destroyed, and proceed to clean and rebuilt the wall. The idea is to be able to defend from gilders coming from two directions, but a limited range that can be arbitrarily large by design. Of course, there exist already a solution to this, which involves 2 sets of highway robbers arrays placed upstream so all possible gliders are captured in the desired range; however, the size array is much bigger in the direction orthogonal to the captured glider, and that size is linear in the range of captured gliders too. So now, the real challenge is to further constraint the stable circuitry to be bounded within the "shadow" of the wall, aka, the intersection of the glider lanes coming from the 2 direction that needs to be filtered. It probably cannot be fully encapsulated in that area, so a "finite" number of cell should be allowed outside (as in, if the range of glider to capture double, the number of active cells outside the shadow is the same). If one has this working, assembling 4 units that each manages 1 wall from a square, we then get a stable pattern that can defend itself from any glider, except at its corners.

Note that the fuse burn period is 6, so that if the number of 3-mer is odd, the current wall example is guarantied to produce a glider on 1 side exactly, though one could work with 2 boats the same side too (there is another placement for a boat that emits a glider, but it is far messier), just that symmetric solution looks nicer (personal opinion I guess).

[hth3]

Two related ideas:
A construction like a line crosser, but for the coiled snake wick.
A construction that when activated, detects if there is a line wick and sends a signal if so.

[confocaloid]

[...] A construction like a line crosser, but for the coiled snake wick. [...]

Related links:
viewtopic.php?p=179515#p179515 One-sided way to "cut" the coiled snake wick, 6 gliders
viewtopic.php?p=179521#p179521 ..., 5 gliders

As far as I know, "repairing the damage" remains an open problem. I did not seriously attempt any searches for this problem. It may be solvable, there are now software tools/scripts that could help (e.g. LLS and related scripts used in various glider synthesis efforts).

[dvgrn]

A construction that when activated, detects if there is a line wick and sends a signal if so.

This one we've got a start on, anyway. Have a look at the line crosser article. There are a couple of eaters in the pattern that are never used if the line wick is present -- but if it's absent, they suppress a pair of honeyfarm explosions.

One way or another, we could add circuitry to convert one of those pre-honeyfarms into a signal heading back away from the line -- or see the "moderately edgy toad" option from 2018. And we could adjust the testing reaction so that a glider never passes through the gap, if the line is there and the gap gets created:

Code: Select all

x = 144, y = 65, rule = B3/S23
2o78bo$obo78bo$3bo78bo$4bo78bo$5bo78bo$6bo78bo$7bo78bo$8bo78bo$9bo78b
o$10bo78bo$11bo78bo$5bo6bo71bo6bo$6bo6bo71bo6bo$4b3o7bo68b3o7bo$15bo78b
o$12bo3bo74bo3bo$13bo3bo74bo3bo$6bo4b3o4bo66bo4b3o4bo$7b2o10bo66b2o10b
o$6b2o12bo64b2o12bo$21bo78bo$22bo78bo$23bo78bo$24bo78bo$25bo78bo$26bo
78bo$27bo78bo$28bo78bo$29bo78bo$30bo78bo$7b2o22bo54b2o$6bobo16bo6bo52b
obo16bo6bo$6bo19bo6bo51bo19bo6bo$5b2o17b3o7bo49b2o17b3o7bo$35bo78bo$30b
2o4bo72b2o4bo$30bobo4bo71bobo4bo$30bo7bo70bo7bo$39bo78bo$40bo78bo$41b
o78bo$42bo78bo$9b2o32bo44b2o32bo$10b2o32bo44b2o32bo$9bo35bo42bo35bo$46b
o78bo$16b2o29bo47b2o29bo$15bobo30bo45bobo30bo$17bo31bo46bo31bo$45b2o3b
o73b2o3bo$44b2o5bo71b2o5bo$19b2o25bo5bo45b2o25bo5bo$18bobo32bo43bobo32b
o$20bo33bo44bo33bo$31b2o10b2o10bo54b2o10b2o10bo$32bo10bobo10bo54bo10b
obo10bo$29b3o11bo13bo50b3o11bo13bo$29bo28bo49bo28bo$59bo78bo$52b2o6bo
70b2o6bo$51b2o8bo68b2o8bo$53bo8bo69bo8bo$63bo78bo$64bo78bo$63b2o!

The known reaction can repair the gap in the line wick, as long as there's at least 5hd between it and the next wick.

So we could build a universal-computer-based "line wick finder" that could feel its way through any chosen distance D, one half-diagonal at a time, cut its way through however many line wicks it finds, copy itself to the other side, and repair the wicks behind itself -- as long as it had enough room to work, and didn't encounter line wicks 3hd or 4hd apart.

There's a similar mechanism available for barge wick detection, I believe. Possibly reading through that thread might find some alternate mechanisms that allow closer-packed line wicks -- I wouldn't be surprised if the question came up at some point, but I don't remember the specifics.

[CARuler]

i've got a challengea: create a spaceship made of copperheads/fireships that slowly destroys and rebuilds itself, making it move at a different speed and/or slope

[confocaloid]

i've got a challengea: create a spaceship made of copperheads/fireships that slowly destroys and rebuilds itself, making it move at a different speed and/or slope

Such a spaceship likely exists somewhere in the set of all possible finite-population patterns, but also likely any example is going to be insufficiently finite to actually look at it and see how it moves and how parts move.

Find a way to construct a glider by colliding copperheads. Then find an arrangement of 15 gliders that eventually collide to make universal construction machinery that eventually reconstructs nothing but an arrangement of copperheads that eventually collide to recreate the same 15-glider arrangement. Sounds simple enough, isn't it?

[hth3]

A metacell that emulates LifeHistory or at least some limited version of it.

[dvgrn]

A metacell that emulates LifeHistory or at least some limited version of it.

There actually is one multistate metacell already! See GUYUT6J's "fangtian2" metacell patterns in recent versions of Golly. I don't think those got nearly enough attention in LifeWiki Current News, when they came out.

[CARuler]

Find a way to construct a glider by colliding copperheads. Then find an arrangement of 15 gliders that eventually collide to make universal construction machinery that eventually reconstructs nothing but an arrangement of copperheads that eventually collide to recreate the same 15-glider arrangement. Sounds simple enough, isn't it?

Have you had a look at the "c/10 constructions" thread? we don't need to collide copperheads

[dvgrn]

Have you had a look at the "c/10 constructions" thread? we don't need to collide copperheads

You'd need to collide copperheads to reduce the problem to the existing case that we know how to solve (via RCT).

Luckily we have this thread, so we already know how to construct a glider using a collision between just two copperheads.

[CARuler]

Have you had a look at the "c/10 constructions" thread? we don't need to collide copperheads

You'd need to collide copperheads to reduce the problem to the existing case that we know how to solve (via RCT).

Luckily we have this thread, so we already know how to construct a glider using a collision between just two copperheads.

Just add Herschels

[LuveelVoom]

Just add heressels

What?

[confocaloid]

Just add heressels

What?

I'd venture a guess that it was meant to be "Herschels" but something went wrong. However, that doesn't explain much (why/how would one add Herschels and how that would help? Missing details, there may be some ways to do without making gliders by colliding copperheads, but that remains to be explained).

[yyh_baboon]

Code: Select all

x=0, y=0, rule=B3/S23
3o8b2o$obo8bo$obo!

In this reaction if the pre-block is an integral, an integral and 3 blinkers would appear with dx=dy=11. Can this be made into a spaceship?

[b-engine]

Code: Select all

x=0, y=0, rule=B3/S23
3o8b2o$obo8bo$obo!

In this reaction if the pre-block is an integral, an integral and 3 blinkers would appear with dx=dy=11. Can this be made into a spaceship?

Not when you cannot get the pi back in the exact position or just a single glider.

EDIT: unless you could clear the ashes:

Code: Select all

x = 39, y = 9, rule = B3/S23
23b3o8b2o$23bobo8bobo$23bobo10bo$36bobo$3o8b2o24b2o$obo8bobo$obo10bo$
13bobo$14b2o!
 

[yyh_baboon]

Code: Select all

x=0, y=0, rule=B3/S23
3o8b2o$obo8bobo$obo9bo!

A boat can also be used in the reaction and would also appear with dx=dy=11,along with 2 blinkers and 1 glider. Maybe this will be better?

[confocaloid]

One plausible way to "use" these reactions would be to move into Other Cellular Automata, in the event that someone discovers a way to tweak the rules in such a way that the integral-moving / boat-moving reaction is preserved "essentially unchanged" but then the pi-heptomino reappears by itself in the correct location, which would result in an "alien" puffer or an "alien" spaceship moving diagonally at 11c/p (for some period p).

It is plausible that there is some two-state isotropic CA implementable in Golly through a weighted neighbourhood where the above happens, but it might be a challenge to find an actual example.

Code: Select all

x=0, y=0, rule=B3/S23
3o8b2o$obo8bo$obo!

In this reaction if the pre-block is an integral, an integral and 3 blinkers would appear with dx=dy=11. Can this be made into a spaceship?

Code: Select all

x=0, y=0, rule=B3/S23
3o8b2o$obo8bobo$obo9bo!

A boat can also be used in the reaction and would also appear with dx=dy=11,along with 2 blinkers and 1 glider. Maybe this will be better?

[b-engine]

Code: Select all

x=0, y=0, rule=B3/S23
3o8b2o$obo8bobo$obo9bo!

A boat can also be used in the reaction and would also appear with dx=dy=11,along with 2 blinkers and 1 glider. Maybe this will be better?

I could get rid of the center trash, but I couldn't find a way to remove blinkers from the sides:

Code: Select all

x = 42, y = 3, rule = B3/S23
3o8b2o15b3o8b2o$obo8bobo14bobo8bobo$obo9bo15bobo9bo!