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Just the place for a Snark!

For discussion of specific patterns or specific families of patterns, both newly-discovered and well-known.

Re: Just the place for a Snark!

Postby codeholic » April 25th, 2015, 5:03 pm

Wow! I didn't expect it to appear so soon. And it's slow salvo friendly too, though quite dirty (but gliderless!). I wonder, if there are slow salvo friendly converters that can make the Snark out of it.
x = 14, y = 15, rule = B3/S23
bo$bo$bo3$12bo$12bo$bo9bobo$obo9bo$bo10bo3$9b2o$8bobo$9bo!
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Re: Just the place for a Snark!

Postby dvgrn » April 25th, 2015, 6:23 pm

codeholic wrote:Wow! I didn't expect it to appear so soon. And it's slow salvo friendly too, though quite dirty (but gliderless!).

As usual, the post-reaction junk can be reduced quite a bit at the cost of various pre-reaction block placements:

x = 49, y = 32, rule = B3/S23
37b2o$37b2o8$23bo$23bo$23bo3$34bo$34bo$23bo9bobo$22bobo9bo$23bo10bo12b
2o$47b2o2$31b2o$30bobo$31bo7$2o$2o!

Hard to tell if any of them would be worth the construction cost. Really it's relatively cheap to shoot down extra junk, unless it's directly behind the output object.

codeholic wrote:I wonder, if there are slow salvo friendly converters that can make the Snark out of it.

Seems as if the topic of slow-salvo recipes for useful sparks has barely been touched so far. I certainly haven't collected anything like a decent toolkit yet.

There are a couple of transformations needed to add the last eight cells to the Snark still life. At least the last transformation -- the three-glider tail-to-hook conversion -- looks promising. I bet there's a two-object constellation that would be a seed for that spark, or a functionally equivalent one.

The other transformation might be complex enough that a seed for the synchronized gliders would be the most efficient way to do it. But I bet at least a few still lifes can be used there, too, to reduce the number of synchronized gliders. It's strange having to calculate the cost so much differently when slow salvos are involved...!
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Re: Just the place for a Snark!

Postby Extrementhusiast » May 10th, 2015, 10:45 pm

It's an even better situation than you think:
x = 17, y = 17, rule = B3/S23
14b2o$bo11bo2bo$obo11b2o$bo6$7bo$6bobo$7bo3$12b3o$12bo$13bo!
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Re: Just the place for a Snark!

Postby calcyman » May 20th, 2016, 12:21 pm

Apparently it's the 179th most common xs22, out of a total of 672172 different 22-bit still-lifes:

https://catagolue.appspot.com/object/xs22_g89fgkczd553/b3s23 (351 sample soups)

This suggests that useful still-lifes are more common than useless ones, which is satisfying.

Also, there have been some occurrences of similar xs24 objects:


It does not seem too unreasonable, therefore, that the xs26 phase of the Snark synthesis might also appear in the foreseeable future:

https://catagolue.appspot.com/object/xs26_oggs2uge1e8zw643/b3s23 (0 sample soups)

Does anyone else have large amounts of computing power that they can throw at b3s23/C1? I seem to be contributing the lion's share at the moment:

https://catagolue.appspot.com/user/apgoucher@gmx.com
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Re: Just the place for a Snark!

Postby 2718281828 » November 5th, 2017, 8:37 am

Not sure if this is an improvement, 21 gliders for the Snark:
x = 137, y = 134, rule = B3/S23
21bo$12bobo7bo$obo10b2o5b3o$b2o10bo$bo5$24bo$22bobo110bo$23b2o109bo$
134b3o$113bo$112bo$112b3o$24bo$25bo$23b3o$132bo$130b2o$131b2o40$63bobo
$63b2o$64bo4$51bo$52bo$50b3o$55b2o$54bobo$56bo4$64b2o$63bobo$65bo19bo$
84b2o$84bobo3$68b2o$68bobo$45bo22bo$45b2o$44bobo16$18b2o$19b2o15b3o$
18bo19bo$37bo4$8b3o$10bo$9bo$24b3o$26bo$25bo13$19b2o$18bobo$20bo$131b
3o$131bo$132bo!
but http://conwaylife.com/wiki/Snark lists
x = 133, y = 130, rule = B3/S23
21bo$12bobo7bo$obo10b2o5b3o$b2o10bo$bo5$24bo$22bobo106bo$23b2o105bo$
130b3o$109bo$108bo$108b3o$24bo$25bo$23b3o$128bo$126b2o$127b2o29$53bo$
54b2o$41bo11b2o$39bobo$40b2o20$53bo8b2o$37b2o14b2o6bobo$36bobo13bobo8b
o19bo$38bo43b2o$82bobo$64b2o$64bobo$45bo18bo$45b2o$44bobo16$18b2o$19b
2o15b3o$18bo19bo$37bo4$8b3o$10bo$9bo$24b3o$26bo$25bo13$19b2o$18bobo$
20bo$127b3o$127bo$128bo!
with 22 gliders
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