Thread For Your Useless Discoveries

[Jormungant]

Brace for impact: Convoluted mwss turner

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x = 47, y = 55, rule = LifeHistory
8$34.A$32.A3.A$31.A$31.A4.A$31.5A15$25.3A$10.3A12.A2BA$10.A2BA4.3A3.B
A3B$9.BA3B3.A2BA3.BA3B$9.BA3BA2.A3BA2.2BABA$8.2BA3B2.2A2BABA.5B$9.2BA
BAB2.BA10B$8.6B3.2B2ABA.5B$9.6B2.2B3AB.5B$8.3BA2B2.3B3A2.5B$9.B3A2B.
3B2A2B.5B$8.2BAB2A.4BABAB.5B$9.2B3AB.2BA2BA2.5B$8.3B3A2.5BA2.5B$9.2B
2A2B2.A5B.5B$8.6B.B2A2BA2B.5B$9.7B2A2BA7BA$8.6B3.3A3B.3B3A$9.6B2.3A3B
.3BAB2A$8.6B2.6B2.4B3A$9.6B.7B.4B3A$8.6B.8B.4B3AB$9.6B.7B.4B2A2B$8.6B
2.7B.8B$9.6B.7B.8B!

[Hdjensofjfnen]

EDIT 2: SO CLOSE Pi-to-H! Off by literally THREE cells!

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x = 9, y = 12, rule = B3/S23
7b2o$7bo$5bobo$5b2o$3o$2bo$3o4$4b2o$4b2o!

Also a block you need to get rid of.

[pcallahan]

Useless but a little surprising. When I collide a glider with this constellation of a loaf and two blocks, I get a glider and eventually (after fully consuming the constellation) four blocks that include the 3-block resettable glider shifter. Since I can't get the initial constellation back, there is nothing I can do with it, but getting the 3-block constellation is noteworthy, since it is really an "engineered" construction, with the 3rd block placed intentionally to exploit symmetry.

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x = 241, y = 167, rule = B3/S23
240bo$238b2o$239b2o61$o$b2o$2o88$81bo$82bo$80b3o5$95b2o$86b2o7b2o$85bo
2bo$85bobo$86bo$89b2o$89b2o!

Maybe there is more to be discovered by colliding with pure block constellations. They do have more symmetries.

BTW, the synthesis of the final block from the original collision is the same as the synthesis in the shifter, catalyzed by a previously block, placed there fortuitously along with its symmetric twin. (Watch the pi evolve from step 84 on) (Which of course means that the two SW gliders are on the same diagonal)

[testitemqlstudop]

21655 gen methuselah with nearly record-breaking F/I.
Pi + dove (is it a dove) + LOM predecessor = huge explosion, F/I is 274

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x = 21, y = 14, rule = B3/S23
13b2o$13bo2bo$14bobo$14b3o$b2o$2o$bo$2bo2$20bo2$16b5o$17b3o$18bo!

[dvgrn]

Useless but a little surprising. When I collide a glider with this constellation of a loaf and two blocks, I get a glider and eventually (after fully consuming the constellation) four blocks that include the 3-block resettable glider shifter.

There's a much weirder coincidence than that, regarding the 3-block glider shifter:

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#C half-blockade-plus-G = glider-shifter-plus-G
x = 47, y = 44, rule = B3/S23
45bo$44bo$44b3o34$2b2o$2b2o2b2o$6b2o3$3o$2bo$bo!

[Moosey]

An expensive, useless, and novel way to synth beehive at beehive based on early stages of the butterfly sequence.

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x = 42, y = 42, rule = B3/S23
35bo$35bobo$35b2o2$39bo$39bobo$39b2o2$33bo$33bobo$26bo6b2o$26bobo$26b
2o2$17bo3bo$17bo3bo$17bo3bo$14b3o5b2o2b2o$26bobo$26bo2$14b3o$17bo$17bo
3$10b3o4b3o$12bo4bo17b2o$11bo6bo16bobo$35bo4$8b3o$10bo$3o6bo17b3o$2bo
24bo$bo26bo2$4b3o$6bo$5bo!

Costs at least 3+3+3+6+6=21 gliders (this way), compared with 4 being the current best.

[mniemiec]

An expensive, useless, and novel way to synth beehive at beehive based on early stages of the butterfly sequence. ...

This seems unnecessarily convoluted. You use 2 gliders to turn each inducting beehive into a block plus a spurious block, one glider to delete the spurious block, and 3 others to delete the inducting block. A single glider can easily remove an inducting block, reducing 6 gliders per side to 5, but even that is unnecessary, as 2 gliders can remove each beehive. In most cases, a small inducting still-life like this can be removed with just one or two gliders.

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x = 76, y = 20, rule = B3/S23
73bo$73bobo$73boo$42bo$12bo29bobo$12bobo27boo$6bo5boo22bo3bo24bo3bo$5b
oboboo24bobobobo23bo3bo$5boboboo24bobobobo23bo3bo$3boobo26boobo3bo21b
3o5boo$bbobbo26bobbo6boo$3boo28boo7bobo28boo$42bo30bobo$3boo28boo27b3o
8bo$3boo27bobbo29bo$33boo30bo$3o26b3o4b3o$bbo28bo4bo19b3o8b3o$bo28bo6b
o20bo8bo$57bo10bo!

[Freywa]

Minimisation of rumbling river 1:

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x = 12, y = 25, rule = B3/S23
2b2o$3bo2b2o$3bobobo$2b2obo$bo$2b4o2$4b3ob2o$2obo5bo$bobob4o$o2bo5b3o$
2obobob2o2bo$bobo4bobo$o2b2obobob2o$3o5bo2bo$3b4obobo$2bo5bob2o$2b2ob
3o2$6b4o$10bo$6bob2o$4bobobo$4b2o2bo$8b2o!

[praosylen]

Minimisation of rumbling river 1

This inspired me to do a bit of searching, and I believe I have ruled out the possibility of (linear) rumbling rivers with period between 5 and 10. Here's an example (extensible) p4 one:

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x = 16, y = 11, rule = B3/S23
8b2o$8b2o2$6b4o$5bo4bo$4bo2bobo2bo$2bobo4bo3bo$bob2ob4ob2obo$bo3bo4bo
3bo$2o3bob2obo3b2o$6bob2o!

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x = 36, y = 12, rule = B3/S23
8b2o8b2o8b2o$8b2o8b2o8b2o2$6b4o6b4o6b4o$5bo4bo4bo4bo4bo4bo$3bo2bobo2b
obo2bobo2bobo2bobo2bo$2bo3bo4bo4bo4bo4bo4bobo$bob2ob4ob4ob4ob4ob4ob2o
bo$bo3bo4bo4bo4bo4bo4bo3bo$2b2obo2bobo2bobo2bobo2bobo2bobo3b2o$obobo3b
2o3b2o3b2o3b2o3b2o$2o!

If the 2-cell strip is allowed to bend, those periods remain a possibility. I haven't searched above p10, but higher periods should be increasingly unlikely.

[mniemiec]

Minimisation of rumbling river 1: ...

This can be further reduced:

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x = 12, y = 25, rule = B3/S23
bboo$3bobboo$3bobobo$bboobo$bo$bb4o$$4b3oboo$3bo5bo$3bob4o$oobo$oobobo
boo$3bo4bo$3booboboboo$8boboo$3b4obo$bbo5bo$bboob3o$$6b4o$10bo$6boboo$
4bobobo$4boobbo$8boo!

[praosylen]

A correction: the negative result from the last post does not apply to p6 or p10, because my search methodology was unintentionally non-exhaustive for periods with multiple distinct prime factors.

Here are some billiard tables. Most are probably known but I can't check at the moment, but a few might potentially be new:
(Medium p5, might be new)

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x = 18, y = 14, rule = B3/S23
4bo$2b3o$bo10b2o$bo2b3o4bo2bo$2obo3bo3bob2o$3bobo2bob2o$3bobo6b5o$4b2o
b4o6bo$6bo5b5o$6bob3o$7b2o2b2o2b2o$11bo4bo$12bo2bo$11b2o2b2o!

(Tiny p7, probably known)

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x = 9, y = 11, rule = B3/S23
4b2o$2o2bo2bo$obobob2o$2bobo$4bob2o$7bo$bo2bobo$b4ob2o$5bo2bo$3bo3b2o
$3b2o!

(Burloaferimeter phase-shifting a p3 at p7, probably but not necessarily known)

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x = 13, y = 11, rule = B3/S23
4b2o$2obob3o$ob2o4bo$5b3obo$b3o5bo$bo3b2o2bob2o$2b3o4bob2o$5b4o$4bo$4b
obo$5b2o!

(Small p8, probably but not necessarily known)

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x = 14, y = 10, rule = B3/S23
6bo$6b3o$9bo$4b3ob2o$3bo2bobo$3bo4bo$2obo4bob2obo$bobobobo2bob2o$bobo
bo4bo$2b2ob2o2b2o!

(Larger p8, might be new)

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x = 19, y = 14, rule = B3/S23
5b2o3bo$6bo2bobo$5bo3b2o$4bob3o$bo2bo4b4o$obobob3o4bo$bo2bo4b4obo$4bo
b4o4bo2bo$5bo4bobobobobo$6b4o4bo2bo$10b3obo$8b2o3bo$7bobo2bo$8bo3b2o!

(Large but possibly reducible p8, component probably known)

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x = 14, y = 16, rule = B3/S23
5b2o$5bo$6bo$3b3obo$3bo2bobo$o3bobobo$4obo2bob2o$8bobobo$2bob3obobo2b
o$2b2o7b2o$5b3obobo$2b3o3b2obo$2bo2b2o3bo$4bo2b3o$5bobo$6bo!

EDITs:
(P5 phase-shifting a p3 at p10, might be new)

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x = 15, y = 15, rule = B3/S23
5b2o$6bo$4bo2b2o$2obob2o2bo$ob2o3b2obo$4b3o2bo$b4o2b2o$bo3b3o5b2o$2b3o
3bo2bo2bo$5b3obob3o$2b2o4b2o$3bob2o3b2o$3bobo4bobo$2b2o2bo4bo$5b2o!

(Drifter-y p10, probably known)

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x = 16, y = 13, rule = B3/S23
2bo$bobo$bobo$2ob2o5b2o$2bo3b2o3bo$2bob2o4bo$3bo6bobob2o$4b3obobob2ob
o$7b2obo$4b2o4bo$4bo5b2o$5bo$4b2o!

[PkmnQ]

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x = 10, y = 10, rule = B3/S23
2o5bobo$2o5bobo$7b3o5$3o4b3o$obo4bo$obo4b3o!

This generates a Ghost Herschel at Generation 14.

[PkmnQ]

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x = 25, y = 13, rule = B3/S23
bo$2bo$3o7$11bo8b4o$10bobo7bo3bo$10bo2bo6bo$11b2o8bo2bo!

Loaf mover.


Edit: If the loaf is not there, nothing happens. Slightly less useless than I thought?

[Moosey]

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x = 25, y = 13, rule = B3/S23
bo$2bo$3o7$11bo8b4o$10bobo7bo3bo$10bo2bo6bo$11b2o8bo2bo!

Loaf mover.


Edit: If the loaf is not there, nothing happens. Slightly less useless than I thought?

I think it might be less “slightly less useful” and more “ever so slightly more novel, but nonetheless absolutely useless.” It’s not like we could use it for anything (as far as I know).

Unless you needed to use loaves in a UC’s memory and you just wanted a spaceship at that displacement and so you could just copy it all down.

Eh. Probably useless.

[Anonymoususer12321]

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bo8bo$2bo6bo$3o6b3o$$$b3o4b3o$3bo4bo$2bo6bo!
C# [[ THEME 6 LOOP 51 GPS 10 ZOOM 24 ]]
C# [[ STOP 50 ]]

4 Gliders synthesis that makes 2 R-pentominoes at Generation 50

[Moosey]

Maybe this is useful, but I doubt it.

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#C a sort of climber reaction thing
x = 16, y = 6, rule = LifeHistory
13.D$13.2D$4.2C2.2C4.2D$2A2.2C2.2C4.D$2A11.D$2A!

[Gamedziner]

Maybe this is useful, but I doubt it.

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#C a sort of climber reaction thing
x = 16, y = 6, rule = LifeHistory
13.D$13.2D$4.2C2.2C4.2D$2A2.2C2.2C4.D$2A11.D$2A!

Almost some sort of hassler(?):

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x = 11, y = 14, rule = LifeHistory
2.2A$2.2A4$5.2A.DCA$.2A2.2AD.AC$CD.A2D2.2D$DCA.2D4$7.2A$7.2A!
C# [[ STOP 23 ]]

[testitemqlstudop]

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x = 22, y = 15, rule = B3/S23
13b5o$13bo4bo$13bo$14bo3bo$bo2bo11bo$o$o3bo11b2o$4o11bo$6b3o2b2o7bo$6b
3o2b2o8bo$6b3o2b2o7bo$4o11bo$o3bo11b2o$o$bo2bo!

[mniemiec]

EDIT: look at this the mwss goes faster than c/2 ...

Incorrect. The trailing MWSS advances at c/2, as does the head of the puffer. The puffer's tail, however, is a fuse that advances slightly more slowly, causing the puffer's body to grow slowly over time. The MWSS eventually catches up with it.

[testitemqlstudop]

Whoops i edited my post in the wrong thread

[googoIpIex]

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x = 22, y = 15, rule = B3/S23
13b5o$13bo4bo$13bo$14bo3bo$bo2bo11bo$o$o3bo11b2o$4o11bo$6b3o2b2o7bo$6b
3o2b2o8bo$6b3o2b2o7bo$4o11bo$o3bo11b2o$o$bo2bo!

I found that once!

[googoIpIex]

It apparently has been found by a for awesome:
http://conwaylife.com/forums/viewtopic. ... fer#p13299

[praosylen]

That's just one of those classic rediscoveries that a sizable fraction of people eventually discover at least once. (I think I remember seeing it posted at least one other time, too.) Cyclic is another one of those, as are the pulsar and pentadecathlon for newcomers. (I'm sure there are others, but I can't think of anything else at the moment.)

[Freywa]

How useless is this active turner?

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x = 9, y = 6, rule = B3/S23
8bo$7b2o$6b2o$2bo4bo$obo5bo$b2o!

[dvgrn]

How useless is this active turner?

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x = 9, y = 6, rule = B3/S23
8bo$7b2o$6b2o$2bo4bo$obo5bo$b2o!

Moderately useless until proven otherwise, I think. There are other G+B -> G options, but any particular one of them isn't too likely to be what you want for any given problem:

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x = 14, y = 25, rule = LifeHistory
2.A$A.A$.2A2$13.A$12.2A$11.2A$12.A$13.A10$13.A$12.2A$11.2A$12.A$3.A9.
A$3.2A$2.A.A!

... I suppose these two could save you a glider on cleanup on very rare occasions, when you have a B-heptomino to suppress, and a block or something on one of the right lanes, that also needs cleanup.