Backrake 3

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Backrake 3
x = 33, y = 103, rule = B3/S23 4b3o6bo5bo6b3o$4bo2bo4b3o3b3o4bo2bo$4bo7bob2ob2obo7bo$4bo3bo15bo3bo$4b o3bo15bo3bo$4bo5bo2bo5bo2bo5bo$5bobo3b2obo3bob2o3bobo$12b2o5b2o4$2b3o 23b3o$bo2bo23bo2bo$4bo23bo$o3bo23bo3bo$o3bo23bo3bo$4bo23bo$bobo25bobo 20$5b3o17b3o$4bo2bo17bo2bo$7bo17bo$3bo3bo17bo3bo$7bo17bo$4bobo19bobo 55$7b3o13b3o$6bo2bo13bo2bo$9bo13bo$5bo3bo13bo3bo$9bo13bo$6bobo15bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ AUTOSTART OFF ZOOM 6 THUMBSIZE 3 HEIGHT 800 ]]
Pattern type Rake
Number of cells 124
Bounding box 103 × 22
Direction Orthogonal
Period 64
Speed c/2
Discovered by Unknown
Year of discovery Unknown

Backrake 3 is a period 64 backrake that was found in the early 1970s. It is most notable for being used in the construction of breeder 1. It consists of a puffer 1 together with two additional heavyweight spaceships and four middleweight spaceships to convert the debris into gliders.[1] Although it emits a glider every 32 generations, the debris cleanup takes 64 generations to complete, making it a pseudo period-32 rake.

See also


  1. Alan Hensel's pattern collection.