Century eater

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Century eater
#N Century eater #C http://conwaylife.com/wiki/Century_eater x = 8, y = 7, rule = B3/S23 3bob2o$3b2obo2$b5o$o2bo2bo$2o3bobo$6b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 32 ]]
Pattern type Eater
Number of cells 20
Bounding box 8×7
Discovered by Ivan Fomichev
Year of discovery 2013

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 ]]
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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

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