Snacker

Snacker
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 ]]
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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 | 0.77
Kinetic symmetry	Unspecified
Discovered by	Mark Niemiec
Year of discovery	1972
Rules Outer-totalistic rules B3/S23 only # of rules 20 = 1 Isotropic rules B3-ckny/S23ainry – B2i34-aejn5-aeiq6-i7c/S234-aijrw5-aiqy6-c
Glider synthesis Fewest gliders 17† Catagolue-generated RLE synthesis Uploaded synthesis RLE snacker_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext snacker.cells RLE snacker.rle
Identifiers apgcode xp9_32acxca23zy04r4zy04r4zo8a6x6a8o Pentadecathlon ID 40P9.2

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.

This oscillator first appeared semi-naturally in the form of a stabilization by fourteeners instead of eater 1s in March 2016.

Gallery

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 = 42, y = 19, rule = B3/S23 32b2o2$28b2o6b2o$8b2o21b4o$24bo2bobo6bobo2bo$4b2o6b2o10b4obobo2bobob4o $7b4o17b2ob4ob2o$3bobo6bobo11bo3bo4bo3bo$b3obobo2bobob3o9b3o3b2o3b3o$o 3b2ob4ob2o3bo11b3o2b3o$b2o3bo4bo3b2o9b3o3b2o3b3o$3b2o2bo2bo2b2o11bo3bo 4bo3bo$3bob2o4b2obo13b2ob4ob2o$24b4obobo2bobob4o$24bo2bobo6bobo2bo$31b 4o$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

• Worker bee

External links

• Snacker at the Life Lexicon

• Snacker at Adam P. Goucher's Catagolue

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