Century eater

Century eater
View static image
Pattern type	Eater
Number of cells	20
Bounding box	8 × 7
Discovered by	Ivan Fomichev
Year of discovery	2013
Rules Outer-totalistic rules B/S23 – B3678/S012345678 # of rules 211 = 2048 Isotropic rules B/S2-in3ceinr – B2in34-jnry5-cjqr678/S012345678
Pattern files Plaintext centuryeater.cells RLE centuryeater.rle
Identifiers apgcode xs20_35is0qmz0643 Pentadecathlon ID 20.32670

The century eater is a 20-cell still life that functions as an eater for the active reaction produced by any century relative. The most well-known use is to replace a four-object constellation in Paul Callahan's bistable switch, as shown below. In September 2014 Josh Ball showed that a variant of this still life has a relatively inexpensive slow glider construction recipe.

#C Century eater replacing a four-object constellation in Paul Callahan's bistable switch #C http://conwaylife.com/wiki/Century_eater x = 30, y = 43, rule = B3/S23 12bob2o$12b2obo2$10b5o$9bo2bo2bo$9b2o3bobo$15b2o16$28b2o$28b2o2$o$b2o$ 2o11$4b2o$3bobo$3bo$2b2o8b2o$12b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 HEIGHT 480 WIDTH 640 ]]

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

At t=256 the active reaction produces an eight-cell pattern sharing the same grandchild as a century. The century eater at the top of the pattern catalyzes this pattern produce a clean spark.

External links

• Century eater at the Life Lexicon

• Century eater at Adam P. Goucher's Catagolue

• 20.32670 at Heinrich Koenig's Game of Life Object Catalogs