Backrake 1

Backrake 1
x = 27, y = 18, rule = B3/S23 5b3o11b3o$4bo3bo9bo3bo$3b2o4bo7bo4b2o$2bobob2ob2o5b2ob2obobo$b2obo4bob 2ob2obo4bob2o$o4bo3bo2bobo2bo3bo4bo$12bobo$2o7b2obobob2o7b2o$12bobo$6b 3o9b3o$6bo3bo9bo$6bobo4b3o$12bo2bo4b2o$15bo$11bo3bo$11bo3bo$15bo$12bob o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 14 AUTOSTART OFF ]]
View static image
Pattern type	Rake Puffer
Number of cells	88
Bounding box	27 × 18
Direction	Orthogonal
Period	8
Speed	c/2
Discovered by	Jason Summers
Year of discovery	2001
Rules Outer-totalistic rules B3/S23 – B38/S23 # of rules 21 = 2 Isotropic rules B3-e/S23-c – B34cejq5eik6cn7e8/S234ceit5enr6-k7e
Pattern files Plaintext backrake1.cells RLE backrake1.rle

Backrake 1 is a period 8 backrake that was discovered by Jason Summers on March 18, 2001. In the form showed in the infobox, it emits a stream of gliders. It can be modified in several ways:

• If the HWSS at the back is removed, it will become a puffer/rake creating nine blocks, eight beehives, six blinkers, two ships and two gliders every 224 generations.
• If the small pattern on the bottommost left side is mirrored onto the right, it will become a puffer creating 14 blocks, ten blinkers, four beehives, two boats, two loaves and two bakeries every 80 generations.
• If the one on the right is mirrored onto the left, it becomes a p2 c/2 spaceship.

[[:RLE:Backrake1-no.hwss-puffer]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 16 Y 6 HEIGHT 480 THUMBSIZE 2 ]]

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

[[:RLE:Backrake1-puffer2]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 16 Y 6 HEIGHT 480 THUMBSIZE 2 ]]

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

Image gallery

[[:RLE:Backrake1-no-hwss]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 5.8 Y 6 HEIGHT 480 THUMBSIZE 2 ]] (click above to open LifeViewer) RLE: here Plaintext: here	[[:RLE:Backrake1-2]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 5.8 Y 6 HEIGHT 480 THUMBSIZE 2 ]] (click above to open LifeViewer) RLE: here Plaintext: here	x = 27, y = 13, rule = B3/S23 5b3o11b3o$4bo3bo9bo3bo$3b2o4bo7bo4b2o$2bobob2ob2o5b2ob2obobo$b2obo4bo b2ob2obo4bob2o$o4bo3bo2bobo2bo3bo4bo$12bobo$2o7b2obobob2o7b2o$12bobo$ 6b3o9b3o$6bo13bo2$5b2o13b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ Y 6 HEIGHT 480 TRACKLOOP 12288 0 -1/2 THUMBSIZE 2 GPS 4 AUTOSTART ]] (click above to open LifeViewer) RLE: here Plaintext: here
Debris emitted by first variation (excluding gliders)	Debris emitted by second variation	The spaceship version of backrake 1

See also

• Backrake 2
• Backrake 3

External links

• Backrake 1 at the Life Lexicon