Code: Select all

```
x = 13, y = 9, rule = B3/S23
3bo$2bobo$2bobo$3bo$11b2o$11b2o$3o$2bo2b3o$bo!
```

The "long antlers" catalyst, one of the components of the glider merger, has a seed, that occurs naturally quite often:
Whether it has any application in slow-salvo constructible circuitry, is a different question

Code: Select all

```
x = 13, y = 9, rule = B3/S23
3bo$2bobo$2bobo$3bo$11b2o$11b2o$3o$2bo2b3o$bo!
```

Ivan Fomichev

Asymmetric seed for HWSS on HWSS 1:
(I don't know how easy that pulsar-predecessor is to make via slow salvo)

Code: Select all

```
x = 7, y = 20, rule = B3/S23
5b2o$b2o2b2o$obo2$3o$2bo6$2bo$2bo$2bo4$3bo$2bobo$3bo!
```

Physics: sophistication from simplicity.

The Twitterbot reported a new eater2 variant with a ready-to-use slow salvo seed:
The blinker is not crucial for the reaction, so hopefully another object that would also save the eater2 can be put there for free.

Code: Select all

```
x = 32, y = 19, rule = B3/S23
10b2o$10b2o3$17b2o$16bobo11b2o$16b2o12b2o$14b2o$13bobo5b2o$13b2o5bobo$
20b2o$18b2o$17bobo$17b2o$3o24bo$2bo24bo$bo25bo$7b2o$7b2o!
```

Ivan Fomichev

Very nice! That's only one cell away from the edge of the reaction envelope, in a good direction. It's even possible to modify the shape of the protruding reaction to the northeast at least a little bit, without destroying the eater2, if that turns out to be useful.codeholic wrote:The Twitterbot reported a new eater2 variant with a ready-to-use slow salvo seed...

I only poked around the edges a little with Seeds of Destruction, so no doubt there's something better:

Code: Select all

```
x = 86, y = 31, rule = LifeHistory
21.B$20.6B$20.8B43.3B$21.7B42.6B$20.12B37.5B3D.2A$19.13B38.7B.ABA$17.
17B33.12BA$7.28B22.22B$6.3B2DBD21B22.3B2DBD16B$5.4B2DB3D19B21.4B2DB3D
18B$5.10BD18B21.10BD19B$5.4BD2A2DBD18B21.4BD2A2DBD20B$3.7B2ADBD19B19.
7B2ADBD21B$3.7BD22B20.7BD24B$3.8BD19B22.8BD16B2D4B$4.8BD4B2A12B23.8BD
4B2A8BD2BD3B$3.7BDBD3BABA11B2A21.7BDBD3BABA9B2D2A2B$3.7B2D4B2A12B2A
21.7B2D4B2A12B2A$3.11B2A13B.B22.11B2A9B2D2B.B$3.10BABA5B2A6B24.10BABA
5B2ABD2BDB$4.9B2A5BABA5B26.9B2A5BABA2B2DB$4.16B2A6B26.16B2A6B$3.15B2A
2B2D4B25.15B2A9B$2.15BABA3BD5B23.15BABA9B$.16B2ABD7B23.16B2A9B$3AB.8B
2.5B2D6B22.3AB.B2D5B2.13B$2BA3.7B5.10B22.2BA3.2D.4B5.9B$.A5.5B6.7B2D
24.A5.5B6.8B$7.2A9.7BD2A29.2A9.8B2A$7.2A12.5B2A29.2A12.5B2A$21.3B47.
3B!
#C [[ VIEWONLY ]]
```

A very simple LWSS-on-HWSS near the edge of the reaction envelope (but not actually edge-shooting)..
Also I did a little bit more tweaking with the eater 2 variant and got this reaction starting with 4 blocks and a boat, plus 11 slow gliders -> Eater 2 variant + 2 blocks

Code: Select all

```
#C [[ ZOOM 6 ]]
x = 16, y = 18, rule = B3/S23
8bo$9bo$7b3o7$12b2o$5b2o5b2o$4bo2bo$5bobo$6bo2$2o12b2o$2o11bobo$14bo!
```

Code: Select all

```
#C [[ ZOOM 7 X -60 Y 60 ]]
x = 152, y = 137, rule = B3/S23
130b2o$130b2o4$150b2o$150b2o4$132b2o$132b2o6$132b2o2b2o8b2o$131bobo2b
2o8bobo$133bo13bo26$108b3o$96b3o11bo$98bo10bo$97bo15$86b2o$87b2o$86bo
10$77b2o$76bobo$78bo7$67b2o$66bobo6b3o$68bo8bo$76bo19$30b2o$29bobo$31b
o5$26b2o$25bobo$27bo3$13b3o$15bo$14bo14$3o$2bo$bo!
```

Physics: sophistication from simplicity.

Here are four slightly better block solutions. Blocks are marked as state 4 cells. (Searched almost every interaction with a single block, manually with SOD. May have missed something.)
EDIT2: Some of the solutions may not require cleanup.

EDIT: Bonus
EDIT3: Speaking of eater2 seeds, I think there are way more pseudo-still-life eater2 solutions... Possibly there may be even cleaner ones. But I guess this one's good enough for now... or isn't it?

Code: Select all

```
x = 32, y = 22, rule = LifeHistory
10.2A$10.2A3$17.2A$16.A.A11.2A$16.2A12.2A$14.2A$13.A.A5.2A$13.2A5.A.A
$20.2A$18.2A$17.A.A$17.2A$3A$2.A21.4D$.A21.2C3D$7.2A14.2C$7.2A2$22.2D
$22.2D!
```

EDIT: Bonus

Code: Select all

```
x = 33, y = 19, rule = B3/S23
10b2o$10b2o3$17b2o12bo$16bobo11bobo$16b2o12bobo$14b2o15bo$13bobo5b2o$
13b2o5bobo$20b2o$18b2o$17bobo$17b2o$3o$2bo$bo21b2o$7b2o14b2o$7b2o!
```

Best wishes to you, Scorbie

The Twitterbot reported a soup producing a simple slow salvo seed for the twin-bees shuttle:

Code: Select all

```
x = 13, y = 25, rule = B3/S23
2o$2o9$bo5bo$bo5bo$bo5bo2$3b3o6$3b3o$2bo2bo$10b2o$2b3o5bobo$11bo!
```

Ivan Fomichev

Wow. Maybe it is possible (and perhaps cheaper) to make slow-salvo p46 assisted circuitry after all, Especially with that p46 block keeper.codeholic wrote:The Twitterbot reported a soup producing a simple slow salvo seed for the twin-bees shuttle:Code: Select all

`x = 13, y = 25, rule = B3/S23 2o$2o9$bo5bo$bo5bo$bo5bo2$3b3o6$3b3o$2bo2bo$10b2o$2b3o5bobo$11bo!`

Best wishes to you, Scorbie

Well, "good enough" is a tricky judgment. This recipe just requires slow-constructing a fleet and a few blocks, and it can be made to work, somehow, for many if not most uses of eater2s in constructible circuitry -- boojum reflectors and syringes and such.Scorbie wrote:EDIT3: Speaking of eater2 seeds, I think there are way more pseudo-still-life eater2 solutions... Possibly there may be even cleaner ones. But I guess this one's good enough for now... or isn't it?

But we're still a long way from being able to write a completely automated compiler that works for eater2s the same way that it works for regular Spartan objects. For blocks and boats and even fishhook eaters, we have plenty of recipes that drop any orientation of the object, as close as we want to any other object, in pretty much any direction. So an automated compiler can build any Spartan constellation in whatever order makes sense -- usually farther to nearer, NE to SW let's say, but north-to-south or east-to-west could also be done.

We'll be able to do that with constellations containing eater2s, just as soon as we have nine different eater2 slow salvo recipes, as shown below -- different orientations of eater2 on the edge of their construction envelopes. The reaction envelope of the latest eater2 seed is shown at the left for comparison:

Code:
Select all

`x = 123, y = 87, rule = LifeHistory`

61.3B$60.4B$59.5B41.3B$58.6B41.4B$57.7B41.5B$56.8B41.6B$55.9B41.7B$

54.10B41.8B$53.11B41.9B$52.12B41.10B$51.2ABA9B11.6B2ABA8B12.6B2ABAB$

50.B2AB3A7B11.6B2AB3A6B12.6B2AB3A$49.8BA6B11.12BA5B12.12BA$48.3B2AB3A

7B11.6B2AB3A6B12.6B2AB3A2B$47.5BABA9B11.7BABA8B12.7BABA5B$46.6BABA9B

11.7BABA8B12.7BABA6B$45.8BA10B11.8BA9B12.8BA8B$44.5BD14B11.4BD13B12.

4BD13B$44.20B11.18B12.18B$44.3BD16B11.2BD15B12.2BD15B2$45.D29.D29.D3$

39.3D27.3D27.3D$41.D29.D29.D$40.D29.D29.D4$61.3B$60.4B$21.B37.5B41.3B

$20.6B32.6B41.4B$20.8B29.7B41.5B$21.7B28.8B41.6B$20.12B23.9B41.7B$19.

13B22.10B41.8B$17.17B19.11B41.9B$7.28B17.BAB2A7B41.11B$6.3B2ABA21B17.

3AB2A7B11.9BAB2A5B12.7BAB2A$5.4B2AB3A19B16.A13B11.7B3AB2A5B12.5B3AB2A

B$3.12BA18B15.2B3AB2A7B11.6BA11B12.4BA8B$5.4BACD2ABA18B14.5BABA8B11.

7B3AB2A5B12.5B3AB2A3B$3.7BCDABA19B13.6BABA8B11.9BABA6B12.7BABA5B$3.7B

A22B13.8BA9B11.9BABA6B12.7BABA6B$3.8BA19B14.19B11.10BA7B12.8BA8B$4.8B

A4B2D12B13.5BD14B11.4BD13B12.4BD13B$3.7BABA3BDBD11B2D12.20B11.18B12.

18B$3.7B2A4B2D10B2A2D12.3BD16B11.2BD15B12.2BD15B$3.11B2D12B2AB$3.10BD

BD5B2D6B16.D29.D29.D$4.9B2D5BDBD5B$4.16B2D6B$3.15B2D6B13.3D27.3D27.3D

$2.15BDBD6B15.D29.D29.D$.16B2D6B15.D29.D29.D$3DB.B2A11B2.4B$2BD3.2A.

4B2.2B5.2B$.D5.5B10.B2D$7.2D14.2D36.3B$7.2D51.4B$59.5B41.3B$58.6B41.

4B$57.7B41.5B$56.8B41.6B$55.9B41.7B$54.10B41.8B$53.A10B41.8BA$52.ABA

9B41.7BABA$51.BABA9B11.8BA9B12.7BABA$50.B2AB3A7B11.7BABA8B12.6B2AB3A$

49.8BA6B11.7BABA8B12.12BA$48.3B2AB3A7B11.6B2AB3A6B12.6B2AB3A2B$47.4B

2ABA9B11.12BA5B12.6B2ABA5B$46.18B11.6B2AB3A6B12.16B$45.19B11.6B2ABA8B

12.17B$44.5BD14B11.4BD13B12.4BD13B$44.20B11.18B12.18B$44.3BD16B11.2BD

15B12.2BD15B2$45.D29.D29.D3$39.3D27.3D27.3D$41.D29.D29.D$40.D29.D29.D!

#C [[ VIEWONLY ZOOM 5 ]]

Of course if a really impressive recipe comes along that shoves an eater2 variant into the far northeast corner of its (square) reaction envelope, that would take care of three of the nine required recipes at once.

In general it's going to be much better to find expensive recipes that drop eater2s at the edge of their reaction envelope, than to find cheap recipes where the eater2 ends up in the middle of the envelope. The cheap recipes will tend to be so difficult to use that the whole construction will take more gliders anyway. (I.e., the recipes for any nearby objects touching that eater2 reaction envelope will tend to be much more expensive, because they have to built after the eater2.)

Can it really be made to work in the syringe? I was under the impression not:dvgrn wrote:This recipe just requires slow-constructing a fleet and a few blocks, and it can be made to work, somehow, for many if not most uses of eater2s in constructible circuitry -- boojum reflectors and syringes and such.

Code: Select all

```
x = 35, y = 73, rule = LifeHistory
3.A$4.A$2.3A2$18.A$16.3A$15.A$15.2A$2A$.A$.A.2A$2.A2.A$3.2A$18.2A13.
2A$18.2A13.2A7$21.2A.A6.2D$21.2A.3A3.D.D$27.A2.D$21.2A.2A.A.2D$22.A.A
.A$10.2A10.A$10.2A11.A$24.A$22.A.A$22.2A12$3.A$4.A$2.3A2$18.A$16.3A$
15.A$15.2A$2A$.A$.A.2A$2.A2.A$3.2A$18.2A13.2A$18.2A13.2A7$21.2A.A$21.
2A.3A4.2D$27.A4.D$21.2A.2A.A.3D$22.A.A.A2.D$10.2A10.A$10.2A11.A$24.A$
22.A.A$22.2A!
#C [[ VIEWONLY ]]
```

I 'm hoping to find a conduit that supresses the FNG...chris_c wrote:Can it really be made to work in the syringe? I was under the impression not:

Best wishes to you, Scorbie

Well, or the first glider of the following dependent conduit, anyway. What should that be called, the First Unnatural Glider? First Dependent Glider?Scorbie wrote:I 'm hoping to find a conduit that supresses the FNG...chris_c wrote:Can it really be made to work in the syringe? I was under the impression not:

Anyway, there are a few options available... a little embarrassing, but workable:

Code:
Select all

`x = 84, y = 120, rule = LifeHistory`

2.A$A.A$.2A29$44.A$42.3A$41.A$41.2A$26.2A$27.A$27.A.2A$28.A2.A$29.2A

10.A$39.A.A2.2A13.2E$40.2A2.2A12.B2E3B$58.8B$59.7B$58.12B$57.13B$55.

17B$45.27B$44.3B2ABA6B.14B$43.4B2AB3A3B.BD13B8.2A$2.A38.12BA2B2.14B8.

A.A$A.A40.4BACD2ABA18B10.A$.2A38.7BCDABA3B2E14B10.2A$36.2A3.7BA7BE14B

$36.2A3.8BA7B3E9B$42.8BA4B2D2BE9B$41.7BABA3BDBD11B2D3.2A$41.7B2A4B2D

10B2A2D3.2A$41.11B2D12B2AB$41.10BDBD5B2D6B$42.9B2D5BDBD5B$42.16B2D6B$

41.15B2D6B$40.15BDBD6B$39.16B2D6B$38.3DB.B2A11B2.4B$38.2BD3.2A.4B2.2B

5.2B$39.D5.5B10.B2D$45.2D14.2D$45.2D12$44.A$42.3A$41.A$41.2A$26.2A$

27.A$27.A.2A$28.A2.A$29.2A10.A$39.A.A2.2A13.2E$40.2A2.2A12.B2E3B$58.

8B$59.7B$58.12B$57.13B$55.17B$45.27B$44.3B2ABA6B.14B$43.4B2AB3A3B.BD

13B8.2A$41.12BA2B2.14B8.A.A$43.4BACD2ABA18B10.A$41.7BCDABA3B2E14B10.

2A$36.2A3.7BA7BE14B$36.2A3.8BA4BEBE12B$42.8BA3B2ED12B$41.7BABA3BDBD

11B2D3.2A$41.7B2A4B2D10B2A2D3.2A$41.11B2D12B2AB$41.10BDBD5B2D6B$42.9B

2D5BDBD5B$42.16B2D6B$41.15B2D6B$40.15BDBD6B$39.16B2D6B$38.3DB.B2A11B

2.4B$38.2BD3.2A.4B2.2B5.2B$39.D5.5B10.B2D$45.2D14.2D$45.2D!

#C [[ AUTOSTART ZOOM 4 X -13 Y 12 STOP 450 ]]

Open the above pattern in LifeHistory and it will show the reaction envelope of the eater2. It only overlaps with two objects -- the eater (of course) and unfortunately also the block behind the eater2, thanks to the part of the envelope that sticks up to the northeast. It's not actually difficult to build blocks out of order and push them into place around corners, though, as long as there are no other obstructions in the area -- just adds a few gliders to the cost.

Here's a variant with some of the blocks in different places, and 9 slow gliders. This may or may not be an improvement -- the reaction envelope sticks out just a few cells further to the northwest:biggiemac wrote:Also I did a little bit more tweaking with the eater 2 variant and got this reaction starting with 4 blocks and a boat, plus 11 slow gliders -> Eater 2 variant + 2 blocks...

Code: Select all

```
x = 244, y = 228, rule = B3/S23
222b2o$222b2o4$242b2o$242b2o4$211b2o$211b2o6$238b2o$238bobo$239bo$231b
2o$231b2o19$206b3o$208bo$207bo18$190b3o$192bo$191bo18$180b2o$181b2o$
180bo18$145b3o$147bo$146bo18$122b2o$123b2o$122bo32$62b2o$61bobo$63bo
10$40b2o$39bobo$41bo25$20b3o$22bo$21bo30$b2o$obo$2bo!
#C [[ PAUSE 3 AUTOSTART STEP 4 ZOOM 6 X -100 Y 100 STOP 1400 ]]
```

I suspect there's also a shorter conversion of the leftover junk from fleet-building in the 11-glider recipe to get that last required block. So that might also end up at 8-10 gliders.

It will be nice when someone works out how to search this kind of recipe space a little more efficiently...!

Aha. The hook at the bottom of that eater2 is a bit of an obstruction but it's still not too difficult to build an eater at one of those locations:dvgrn wrote: Anyway, there are a few options available... a little embarrassing, but workable:

Code: Select all

```
x = 575, y = 592, rule = LifeHistory
555.2A.A$555.2A.3A$561.A$555.2A.2A.A$556.A.A.A$556.A$557.A$558.A$556.
A.A$556.2A15.2E$573.2E19$557.3A$559.A$558.A68$494.3A$496.A$495.A68$
418.3A$420.A$419.A68$351.3A$353.A$352.A68$261.2A$262.2A$261.A74$187.
2A$188.2A$187.A64$122.2A$123.2A$122.A66$66.3A$68.A$67.A68$3A$2.A$.A!
```

Interesting way to produce the twin-bees shuttle with the smallest minimal population:

Code: Select all

```
x = 13, y = 27, rule = Life
4bo$4bo$4bo2$3o3b3o8$bo5bo$bo5bo$bo5bo2$3b3o6$3b3o$2bo2bo$10b2o$2b3o5b
obo$11bo!
```

Ivan Fomichev

Pretty edge eater synth:

Code: Select all

```
x = 9, y = 11, rule = B3/S23
2b2o3b2o$2b2o3b2o7$2bo$b3o$2o2bo!
```

I did some work on making an eater2 with slow glider pairs. It ended up at just 6 glider pairs for both orientations which I am pretty pleased with. The second one is a bit messy but there is more freedom in two-armed construction so maybe it is sufficient.

Code: Select all

```
x = 365, y = 113, rule = LifeHistory
277.2A$276.2A$269.3A6.A$271.A$270.A4$103.A$102.2A$102.A.A$84.2A$85.2A
$84.A4$259.3A$261.A$260.A37.2A$297.2A$299.A10$138.2A$69.2A67.A.A$70.
2A66.A$69.A17$52.2A97.2A$51.A.A97.A.A$53.A97.A5$320.2A$271.2A47.A.A$
226.A45.2A46.A$226.2A43.A$225.A.A5$32.2A$33.2A$32.A107.2A$140.A.A$
140.A4$257.2A71.2A$256.A.A71.A.A$258.A71.A5$10.2A$9.A.A$11.A3$325.2A$
151.2A171.2A$151.A.A92.A79.A$151.A94.2A$245.A.A2$191.2A$190.2A$192.A
8$.2A$A.A$2.A5$363.2A$362.2A$364.A!
```

Nice! Six slow pairs seems a lot more efficient than the pure slow-salvo approach. With two arms, it's still going to be possible to build other things after the eater2, inside its construction envelope, anywhere except due northeast or northwest of it in the eater2's shadow(s).chris_c wrote:I did some work on making an eater2 with slow glider pairs. It ended up at just 6 glider pairs for both orientations which I am pretty pleased with. The second one is a bit messy but there is more freedom in two-armed construction so maybe it is sufficient.

In an emergency, of course, there are almost always going to be slow-salvo workarounds for those shadowed locations -- use whichever arm is not obstructed by the eater2, starting with a target constructed just barely beyond the shadow. (The other arm can do a similar-sized slow-salvo construction at the same time, a safe distance away, since otherwise it will just be waiting around...!)

With any luck that kind of thing won't be necessary too often, though, or else a tighter recipe for that eater2 orientation will show up.

Given the usefulness of the BTS catalyst, perhaps we could look for a slow salvo seed. None of the immediately apparent variants (snake, eater, carrier, or loaf+1 inductor) have shown up yet on catagolue, but a quick search found an R + 2sl seed for eater on table that also releases 2 gliders.
Perhaps it would be reasonable to divert the gliders into a bookend component synthesis? Or have the lower one make a pi explosion and add choice stills until it puts a bookend in place for us?

Code: Select all

```
x = 18, y = 12, rule = B3/S23
$7bo$6bo$3bo2b3o$2bobo11b2o$2bobo10bobo$3bo12bo3$bo$obo$bo!
```

Physics: sophistication from simplicity.

The same exact eater2 variant has showed up again in Catagolue, and not surprisingly it's pretty much the same slow-salvo seed, generated in a much simpler way this time. An R-pentomino hits a boat in the same way to make the fleet, a couple of other objects just happen to be in the right places as well, and a Herschel (made a completely different way this time) again supplies the trigger glider. Here's the seed I ended up with this time around -- no particular improvement over previous ones:codeholic wrote:The Twitterbot reported a new eater2 variant with a ready-to-use slow salvo seed...

Code:
Select all

`x = 32, y = 30, rule = LifeHistory`

18.B$17.6B$17.8B$18.7B$17.12B$16.13B$14.17B$4.28B$3.3B2DBD21B$2.4B2DB

3D19B$2.10BD18B$2.4BD2A2DBD18B$7B2ADBD19B$7BD22B$8BD19B$.8BD2B2D2A13B

$7BDBD2BDABA11B2A$7B2D4B2A12BA.A$11B2A13B.BA$10BABA5B2A6B$.B2A6B2A5BA

BA5B$.ABA13B2A6B$2.BA11B2A7B$2.12BABA7B$2.12B2A7B$2.B2D5B2.11B$3.2D.

4B4.9B2A$4.5B6.8B2A$4.2A9.8B$4.2A12.4B!

#C [[ VIEWONLY ZOOM 15 THUMBNAIL ]]

Code: Select all

```
#C http://catagolue.appspot.com/hashsoup/C1/M3PXMhKhMsz87974966/b3s23
x = 16, y = 16, rule = B3/S23
o2bo2bo3b3o2bo$bobob3ob2ob4o$8ob2obobo$bob3obo2bobo$ob3o6bob2o$7b6obo$
b2o2b3obo5bo$o4bo3b4o$3b2obo2bo2b2obo$obob4obob2o2bo$4b2o2b2o4b2o$o6b
3obo3bo$3bobo2b3o2bobo$obo5b2ob2obo$b2o2b2obo5b2o$4b2obo!
```

This looks as it might be useful:

Code: Select all

```
x = 9, y = 16, rule = B3/S23
3bo$b3o$o$2o3$7bo$6bobo$6bobo$7bo2$3bo$2b2o$bo$2b2o$3bo!
```

There is a soup with a new quite edgy eater2 precursor seed in Catagolue.

Code: Select all

```
x = 88, y = 99, rule = LifeHistory
67.2A$66.A2.A$67.A.A$68.A2$75.A$75.A$75.A9$64.A8.A$63.A.A6.2A$63.A.A
5.2A$64.A6.A5$61.14B$61.14B$59.16B$58.6BD10B11.2A$58.6B3DBD6B11.2A$
59.8B2D5B$59.5B2D8B$59.5BDB3D4B$60.9BDB$62.6BD2B$64.4BDBDB$65.4B2D$
66.3B44$17.2A$16.A.A$18.A6$9.2A$8.A.A$10.A6$.2A$A.A$2.A!
```

Ivan Fomichev

- gmc_nxtman
**Posts:**1147**Joined:**May 26th, 2015, 7:20 pm

Slow-salvo seed for an interesting (but useless) p2, I'm guessing that it can be reduced:

Code: Select all

```
x = 26, y = 28, rule = B3/S23
23bobo$23b2o$24bo12$10bo$10bo$10bo$5b2o10bo$4bo2bo8bobo$5b2o10bobo$b2o
7b2o6b2o$o2bo5bo2bo10b2o$b2o7b2o10bo2bo$23b2o$6bo$5bobo$5bobo$6bo!
```

I went through all asymmetric soups in Catagolue that produce the canonical Eater 2 and compiled a list of the most promising ones in terms of slow salvo synthesis and usefulness for constructible circuitry.
I think the best of the best are the I, VI and VII. It also looks like to me they may constitute a universal set, that would be good enough for most purposes. V is quite curious in that all the still lifes are so close to each other and the reaction is also quite compact. It could be a good candidate for cheap synthesis for the cases when there are no strict spatial constraints.

Code: Select all

```
x = 383, y = 344, rule = LifeHistory
D49.D.D47.D.D.D45.D.D.D45.D.D47.D.D.D45.D.D.D.D43.D.D.D.D.D$D49.D.D
47.D.D.D45.D.D.D45.D.D47.D.D.D45.D.D.D.D43.D.D.D.D.D$D49.D.D47.D.D.D
45.D.D.D45.D.D47.D.D.D45.D.D.D.D43.D.D.D.D.D$D49.D.D47.D.D.D45.D2.D
47.D49.D2.D46.D2.D.D44.D2.D.D.D17$13.B58.2C29.D58.B.B43.2B60.B35.2B
62.B$12.BDB2.B52.2B2C2B26.DCDB53.7B41.3B55.B3.3B2.B2D28.4B59.5B$12.DB
D3B2CB3.2B41.C.2BDB2D2B25.CBC2B51.8B40.5B.2B41.2B3.14BD2BD27.4B58.6B$
11.BDBD2BC2BC3B3C39.BCB3DB2DB26.CDBCB51.10B38.7B2C38.22BDBD26.6B57.9B
$11.2BD3BC2BC5B41.CD6B27.B2C3B.B.B46.10B38.6BC2BCB35.24BD2B24.7B57.7B
3D$9.9B2C6B.2D27.3B10.2DCB2D3B24.5BC5B.B2CB39.11B37.BC5BC2BCB34.27BCB
21.11B54.8B3C$7.10B2D7BDBDB25.5B9.BCDCD6B21.5BCBCB2DB.CBC3B35.13B36.B
CBC5B2CB35.27BCB21.11B2.B47.BD2.11B$6.10BD2BD6B2D2B23.11B5.CBDCD6B20.
5BC2DCB2D3BC5B34.13B35.2BCBC8B4.C29.28BCB20.16B.4B39.3BD12B$7.10B2D
13B19.19B2CD2BC4B20.5BD2C16B32.11B34.5BC8B3.BCBC28.29B21.4BD17B36.5BD
11B$3.29B18.7B3C14BCBC3B20.2BD3B3DB2D14B29.C11B34.8B3D7B2C29.22BDBD4B
22.2BDBD17B33.10BD10B$2.30B18.2D6BC16BC5B19.BDBD4BDBD16B27.BC11B33.
20B30.22BDBD5B21.2BDBD3BC15B4.2B4.B19.3BC6BDBD8BCB$.30B19.2D28B20.BD
2BD3BDBD18B22.B2.BC11B33.15B2C3B31.21B3D7B19.3BD4B2C15B2.C3B2.3B19.2B
C6BDBD7BCBC$2.15B2C10B23.21B2D4B23.2D5BD6B2D11B21.3B.12B35.10BDB2D2CB
.3B35.27B17.8BCBC16BC3BDB2DB20.BC7BD8BCBC$.16BCBC9B25.10B2D6BD2BD2B
24.13BD2BD11B20.B3C3B3C7B35.7B3DB2D7B36.2BC24B17.9B2C15BCB3DB2D2B19.
19BC2B$17BCBCD8B25.10B2D3BC3B2D4B22.15B2DB2CBC8B20.17B34.6BD14B36.CBC
17B2D6B18.5B2C17BD8B21.20B$.17B2CD8B23.16BCBC8B21.19BC2BC9B20.3BC12B
35.B2D3B3DB2D8B36.CBC7B3C7B2D7B16.6BC13B3C3B3CB2D2B19.3B2D10B2D6B$3.
26B21.2D17BC9B21.20B3C2B2.6B21.BC14B33.BD3C3BDBC9B37.C8BCBC16B17.11B.
6B2.7BDBD3B19.2BD2BD9B2D7B$3.25B2D20.2D6BC15B.3B22.26B4.4B20.BC12BC2D
33.3BC3BDCDC7B40.2B.4BCBC16B18.6B5.6B2.3BC3BDBD3B18.4B2D18B$3.12B.B5.
6B2D20.7B3C3B2D8B28.23B.4B2.4B20.12BCBCD35.C4BCDBC5B45.4B.20B17.5B5.
3B2DB2.3BC4BD4B17.25B$.C.4BC8B8.5B22.12B2D9B27.6B2C10B2C7B2C2.4B20.
12B2CB.2B34.4B2C3B48.3B3.14BC4B17.6B5.2B2D4.2BC3B.3B19.26B$CBC2BDCDC
3B2C2B10.B26.22B26.6B2C10BCBC6B2C3.4B19.18B35.8B54.13BDC2D2B17.B2C3B
12.7B2.B17.2B.4BC21B$CBC3DCDC3B2CB42.3B.13B33.3B.9B2C8B4.4B18.5B2D12B
35.7B55.10B3DC2D2B17.B2C3B12.2D3BC2B18.8B3C19B$.CD4BC4B46.B2.12B35.B
3.17B6.4B16.5BD2BD11B35.6B58.7BD6B19.5B13.2D2BC.CB18.9BC20B$3.3DB2DB
51.12B40.10B2.3B8.4B13.8B2D4BDB2D5B35.5B62.4B3DB2D19.5B14.3B2CB18.17B
2D10B$4.2CBD52.11B39.C4.6B16.4B12.B2C3B2C4B3DB2D2C3B36.4B64.2B2CDBD
22.B19.2B19.3BD9BD3B2D11B$4.2CBD53.10B38.C.C3.6B17.4B10.BC2BC2BCBC2BD
6B2C4B36.2B66.CBCDBD63.2BDBD7BDBD17B$6.D55.10B36.C2.C3.7B17.4B10.B2C
5BC3B3DB2D6B105.C2.D65.BDBD7BDBD18B$66.6B37.2C4.3BD2B19.4B9.6BCBC5BDB
D8B174.CD7B2DB3D15B$65.6B44.2BDBDB20.4B10.4B2C6BDBD7B174.BCB2.11BD14B
$66.5B45.BDBD22.4B9.2D11BD2BC5B175.C3.5B2D2C2D14B$66.6B45.BD24.4B8.2D
13BCBC4B180.4B2D2C14B$66.6B72.4B8.14BCBC5B179.6B5.11B$66.5B74.BDBD10.
12BC6B181.3B8.4BD2B$66.2B3D75.B2D10.15B2D3B181.B8.B2C2BDB$67.BDB77.D
11.5B.9BD2B2DB189.C2.C.D$67.3D90.2B3.10B2DBDB190.2C$68.B95.15B$164.
13B$163.13B$164.10B$166.4B11$316.A$314.2A$315.2A7$307.2A3.2A$306.A2.A
2.2A14.A$306.A.A19.A$307.A20.A2$324.3A3.3A$4.B$3.3D322.A$3.3B322.A$.D
B3CBD320.A$DBDCBCDBD299.2A$DBD3CDBD299.2A20.A$.D2.B2.D321.A.A$3.3B
323.2A$3.B2CB$4.2C26$299.2A$298.A2.A$299.A.A$290.A.A7.A$291.2A$291.A$
300.2A$299.A2.A$300.2A2$328.A$328.A$328.A2$324.3A3.3A2$328.A$328.A$
328.A$308.2A$308.2A20.A$329.A.A$329.2A30$311.A$310.A$310.3A5$302.A$
301.A.A24.A$301.A.A24.A$302.A25.A2$324.3A3.3A$299.2A$298.A2.A26.A$
299.2A27.A$328.A$308.2A$308.2A20.A$329.A.A$329.2A38$306.A21.A$305.A.A
20.A$305.A2.A19.A$306.2A$324.3A3.3A$299.2A$298.A2.A26.A$299.2A15.A11.
A$315.2A11.A$308.2A5.A.A$308.2A20.A$329.A.A$329.2A28$316.A$314.2A$
315.2A7$307.2A3.2A$306.A2.A2.2A14.A$306.A.A19.A$307.A20.A2$324.3A3.3A
2$328.A$328.A$328.A$308.2A$308.2A20.A$329.A.A$329.2A32$316.A$315.A$
304.A10.3A$304.A$304.A2$307.A20.A$306.A.A19.A$306.A.A19.A$307.A$324.
3A3.3A2$328.A$328.A$328.A$308.2A$308.2A20.A$329.A.A$329.2A!
```

Ivan Fomichev

By the way, here is the list of all Eater 2 variants listed in Catagolue by now. If you want to investigate other variants, please tell me which ones in order to avoid duplicate work.

Code: Select all

```
x = 8193, y = 8193, rule = Life #C workaround LifeViewer issue
xs19_4aar0rbzx121
xs19_3pm0mmzw343
xs20_gbbgra96z11
xs20_gbbgraicz11
xs23_69eg6qzw2303453
xs19_br0raa4z23
xs21_br0raicz01221
xs20_br0raicz23
xs21_32ar0ra23zx121
xs21_br0raicz0123
xs21_g0ggm96zdlge2
xs20_69ar0rbzx121
xs20_br0ra96z23
xs20_cc0c9jz17871
xs21_ml5a4z1011d96
xs24_0j96zqr0ra96
xs26_br0raarz230321
xs21_g0ggm93zdlge2
xs21_mm0mp3z6943
xs22_g0ggm952zdlge2
xs22_gbbgraarz11
xs19_wmkiarz696
xs19_wmkiarzc96
xs20_0gbbgraa4z121
xs20_2lm0mk46zw343
xs21_0br0raa4z643
xs21_0gbbgraa4z321
xs21_2lm0mp3zw3452
xs21_3lm0mp3zw343
xs21_br0ra952z23
xs22_0br0ra96z643
xs22_0gbbgra96z321
xs22_2596o8zw320fgkc
xs22_2lm0mkkozw3452
xs22_3lm0mp3zw3452
xs22_br0ra96z3421
xs23_0gs2lmz4aic543
xs23_39eg6qzx121079c
xs23_cc0ci53z178jd
xs24_0gbbgraarz321
xs24_0mm0mk453zc87011
xs24_3lkm0mmz3201074
xs24_4a9e0mmz69d1101
xs24_cc0c88brz17871
xs25_0gs2pmzc9606ako
xs25_39eg6qzx123chr
xs25_8e1f8brz330311
xs26_3lkm0mmz12430346
xs27_br0raacz2303453
```

Ivan Fomichev