Eater 4

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Eater 4
3b2o$3bo$2obo$o2b2o$b2o4bo$3b5o$3bo4b2o$4b2o2bo$6bobo$6bobobo2bo$7b2ob 4o$9bo$9bobo$10b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life #C [[ HEIGHT 480 WIDTH 480 THUMBSIZE 2 ]]
Pattern type Strict still life
Number of cells 40
Bounding box 14 × 14
Discovered by David Buckingham
Year of discovery Unknown

Eater 4 is a 40-cell still life catalyst allegedly found by David Buckingham.[1]

Despite its name being in a series of eaters, this still life cannot eat gliders in regular Life. As it is diagonally symmetric, it can only perturb symmetric reactions; the four northeast-most center cells regrow in a few generations after being destroyed by taking a bite out of something. Examples include the pre-pulsar hassler in p29 pentadecathlon hassler, the p30 honey farm hassler shown below, and the L122 Herschel conduit. For details of its catalyses, see Tutorials/Catalyses#Eater_4.

x = 29, y = 22, rule = B3/S23 17b2o$17bobo$19bo$15b4ob2o$15bo2bobobo$20bobo$20bo2b2o$4bo14b2o4bo$4ob o15b5o$3obobo14bo4b2o$5bobo16b2o2bo$6bo18bob2o$5b2o7b2ob3o5bo$5b2o7b2o 8b2o$5b2o4$18b2o$18bo$19b3o$21bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 6 THUMBSIZE 2 ZOOM 16 HEIGHT 500 WIDTH 500 ]]
p30 honey farm hassler found by Dongook Lee on January 3, 2016 (click above to open LifeViewer)
RLE: here Plaintext: here

On January 7, 2020, Jeremy Tan found a 14-glider synthesis of this still life.[2]

See also


  1. Dean Hickerson's oscillator stamp collection. Retrieved on May 28, 2022.
  2. Jeremy Tan (January 7, 2020). Re: Soup-based syntheses (discussion thread) at the forums

External links