Backrake 2

	Backrake 2
	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 19, y = 26, rule = B3/S23 3bo$2b3o$b2obo5bo$b3o5b3o$2b2o4bo2b2o3b3o$8b3o4bo2bo$18bo$18bo$18bo$2b 3o12bo$2bo2bo$2bo$2bo$3bo7$3o$o2bo11bo$o13b3o$o12b2obo$o12b3o$bo12b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ ZOOM 10 AUTOSTART OFF ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 19, y = 26, rule = B3/S23 3bo$2b3o$b2obo5bo$b3o5b3o$2b2o4bo2b2o3b3o$8b3o4bo2bo$18bo$18bo$18bo$2b 3o12bo$2bo2bo$2bo$2bo$3bo7$3o$o2bo11bo$o13b3o$o12b2obo$o12b3o$bo12b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ ZOOM 10 AUTOSTART OFF ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type	Rake; Puffer
Number of cells	65
Bounding box	19×26
Direction	Orthogonal
Period	12
Speed	c/2
Discovered by	David Buckingham
Year of discovery	Unknown
[show] Glider synthesis
Fewest gliders	17
Uploaded synthesis RLE	backrake2_synth.rle
[show] Pattern files
Plaintext	backrake2.cells
RLE	backrake2.rle

Backrake 2 is a period 12 backrake that was created by David Buckingham. It works by having a front puffer made up of two lightweight spaceships, a middleweight spaceship, and a B-heptomino (much like puffer 2) send debris back to another lightweight and middleweight spaceship, which turn the debris into a backward-moving glider.

Three copies of this backrake feature in total aperiodic.

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