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 period-9 oscillator in which four eater 1s hassle a pentadecathlon, found by Mark Niemiec in 1972.

The snacker produces domino sparks, which can be used for a p36 toad hassler. In other cases the sparks are largely inaccessible due to the eaters; however, the snacker can be extended by putting more pentadecathlons as shown below, and so a more accessible period 9 domino spark can be obtained -- this method was used to create the first period-18 oscillator, 117P18. Stronger domino sparkers are also known, for example 50P9 and 104P9.

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

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 (click above to open LifeViewer) RLE: here Plaintext: here

See also

• Worker bee
• Period-54 glider gun, which uses a snacker
• p29 pentadecathlon hassler

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