Snacker

Snacker is a period-9 oscillator consisting of a pentadecathlon hassled by four eater 1s, found by Mark Niemiec in 1972.[1]

Snacker
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>2o16b2o$bo16bob$bobo12bobob$2b2o12b2o2b$7bo4bo7b$5b2ob4ob2o5b$7bo4bo7b $2b2o12b2o2b$bobo12bobob$bo16bob$2o16b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ GPS 3 LOOP 9 THUMBSIZE 4 WIDTH 800 HEIGHT 480 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type Oscillator
Number of cells 40
Bounding box 20×11
Period 9
Mod 9
Heat 26.2
Volatility 0.77
Strict volatility 0.77
Discovered by Mark Niemiec
Year of discovery 1972

The snacker produces domino sparks, which can be used for a p36 toad hassler. In other cases they may be rather inaccessible due to the eaters. By putting more pentadecathlons, the snacker is extensible as shown below, whose spark is more accessible. This leads to the first period-18 oscillator, 117P18. A more accessible domino spark can also be obtained using a different oscillator shown below.

This oscillator first appeared semi-naturally in the form stabilized by fourteeners instead of eater 1s in March 2016.[2]

Additional pentadecathlons can be added to extend snacker. The alternate stabilization on the right was found by Dean Hickerson in April 1998. View animated image.
Download RLE: click here
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 45, y = 19, rule = B3/S23 32b2o2$28b2o6b2o$8b2o21b4o$24bo2bobo6bobo2bo$4b2o6b2o10b4obobo2bobob4o $7b4o17b2ob4ob2o$3bobo6bobo6b2o3bo3bo4bo3bo3b2o$b3obobo2bobob3o4bobobo b2o2b4o2b2obobobo$o3b2ob4ob2o3bo5bobo3b2o4b2o3bobo$b2o3bo4bo3b2o4bobob ob2o2b4o2b2obobobo$3b2o2bo2bo2b2o6b2o3bo3bo4bo3bo3b2o$3bob2o4b2obo13b 2ob4ob2o$24b4obobo2bobob4o$24bo2bobo6bobo2bo$31b4o$28b2o6b2o2$32b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 3 LOOP 9 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 12 HEIGHT 320 WIDTH 600 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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A much more accessible p9 domino sparker that is
only 10 cells larger, and its double variant.
(click above to open LifeViewer)
RLE: here Plaintext: here
gollark: https://www.theregister.com/2019/03/05/ai_gaydar/ (headline is vaguely misleading)
gollark: I blatantly stole it from helloboi.
gollark: I may be referred to as car/cdr if desired.
gollark: The problem with spaces is that you can’t actually see them. So you can’t be sure they’re correct. Also they aren’t actually there anyway - they are the absence of code. “Anti-code” if you will. Too many developers format their code “to make it more maintainable” (like that’s actually a thing), but they’re really just filling the document with spaces. And it’s impossible to know how spaces will effect your code, because if you can’t see them, then you can’t read them. Real code wizards know to just write one long line and pack it in tight. What’s that you say? You wrote 600 lines of code today? Well I wrote one, and it took all week, but it’s the best. And when I hand this project over to you next month I’ll have solved world peace in just 14 lines and you will be so lucky to have my code on your screen <ninja chop>.
gollark: Remove the call stack and do trampolining or something?

See also

References
  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. thunk (March 28, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  • 40P9.2 at Heinrich Koenig's Game of Life Object Catalogs
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