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: Consider the Riemann sphere.
gollark: Are you saying they have better or equivalent time complexity? This is incorrect.
gollark: Despite having worse time complexity than counter-based ones, sorts are the most popular.
gollark: #1 is just doing mergesort.
gollark: You didn't even analyze #3, I had to explain it all to everyone.

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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