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 period 2 c/2 spaceship.
• If the small pattern on the bottommost left side is mirrored onto the right, but the small pattern's phase is different from the small pattern on the other side, more puffers can be created.

[[:RLE:Backrake1-no.hwss-puffer]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 16 Y 6 HEIGHT 480 THUMBSIZE 2 TRACK 0 -1/2 GPS 8 ]]

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 TRACK 0 -1/2 GPS 8 ]]

Second variation (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 ]]

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

[[:RLE:Backrake1-puffer2-phase]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ X 1 Y 4 HEIGHT 480 TRACKLOOP 12288 0 -1/2 THUMBSIZE 2 GPS 8 ]]

An example of the forth variation (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

[[:RLE:Backrake1-no-hwss]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 5.5 Y 6 HEIGHT 480 THUMBSIZE 2 ]]

Debris emitted by first variation (excluding gliders) (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

[[:RLE:Backrake1-2]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 4.5 Y 6 HEIGHT 480 THUMBSIZE 2 ]]

Debris emitted by second variation (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

See also

• Backrake 2
• Backrake 3

External links

• Backrake 1 at the Life Lexicon