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2o16b2o$bo16bob$bobo12bobob$2b2o12b2o2b$7bo4bo7b$5b2ob4ob2o5b$7bo4bo7b $2b2o12b2o2b$bobo12bobob$bo16bob$2o16b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 3 LOOP 9 THUMBSIZE 4 WIDTH 800 HEIGHT 480 ]]
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

Snacker is a period-9 oscillator consisting of a pentadecathlon hassled by four eater 1s, found by Mark Niemiec in 1972.[1][2]

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. Stronger domino sparkers are also found, for example 50P9 and 104P9.

This oscillator first appeared semi-naturally in the form stabilized by fourteeners instead of eater 1s in March 2016.[3]

x = 34, y = 11, rule = B3/S23 2o$bo$bobo25b2o$2b2o23bo2bo$7bo4bo14b3o$5b2ob4ob2o3bo4bo6b3o$7bo4bo3b 2ob4ob2o3bo3bo$2b2o14bo4bo6b3o$bobo23b3o$bo25bo2bo$2o27b2o! #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 ]]
Additional pentadecathlons can be added to extend snacker.
The alternate stabilization on the right was found by Dean Hickerson in April 1998.
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See also


  1. Robert Wainwright (March 1973). Lifeline, vol 9, page 3.
  2. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  3. thunk (March 28, 2016). Re: Soup search results (discussion thread) at the forums

External links

  • 40P9.2 at Heinrich Koenig's Game of Life Object Catalogs