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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 pentadecathlon with eater 1 stabilizers that force it into a lower period (from 15 to 9). It was found by Mark Niemiec in 1972. The stabilizers make the domino spark largely inaccessible, but the snacker is extensible as shown below and so a more accessible period 9 domino spark can be obtained – this is exactly the method that was used to create the first period 18 oscillator, 117P18. A more accessible domino spark can also be obtained using a different oscillator shown below.


Additional pentadecathlons can be added to extend snacker. The alternate stabilization on the right was found by Dean Hickerson in April 1998.
Download RLE: click here
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 ]]
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

See also

External links

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