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.

x = 27, y = 13, rule = B3/S23 5b3o11b3o$4bo3bo9bo3bo$3b2o4bo7bo4b2o$2bobob2ob2o5b2ob2obobo$b2obo4bo b2ob2obo4bob2o$o4bo3bo2bobo2bo3bo4bo$12bobo$2o7b2obobob2o7b2o$12bobo$ 6b3o9b3o$6bo3bo9bo$6bobo$20b2o! #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

x = 27, y = 12, rule = B3/S23 5b3o11b3o$4bo3bo9bo3bo$3b2o4bo7bo4b2o$2bobob2ob2o5b2ob2obobo$b2obo4bo b2ob2obo4bob2o$o4bo3bo2bobo2bo3bo4bo$12bobo$2o7b2obobob2o7b2o$12bobo$ 6b3o9b3o$6bo3bo5bo3bo$6bobo9bobo! #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

x = 27, y = 15, rule = B3/S23 5b3o11b3o$4bo3bo9bo3bo$3b2o4bo7bo4b2o$2bobob2ob2o5b2ob2obobo$b2obo4bo b2ob2obo4bob2o$o4bo3bo2bobo2bo3bo4bo$12bobo$2o7b2obobob2o7b2o$12bobo$ 6b3o9b3o$6bo3bo5bo3bo$6bobo8bo3bo$21bo$17bo2bo$18b3o! #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 fourth variation (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

x = 79, y = 91, rule = B3/S23 46bo$46bo$46bo2$38b2o8b3o$38b2o5$76b2o$76bobo$77b2o4$58b2o$58b2o2$30b 2o$30b2o34b2o$66b2o5$42bo$b2o39bo$obo39bo$2o$38b3o3$19b2o$19b2o2$53bo $11b2o40bo$11b2o40bo8$38bo$37bobo$37bobo$38bo13b2o$51bo2bo$52b2o6$35b 2o$35b2o3$44b2o$44b2o$39bo$38bobo$38bobo$39bo2$34b2o7b2o$33bo2bo5bo2b o$34b2o7b2o2$39bo$38bobo$38bobo$39bo5$42b3o2$37b2o$37b2o5$37b2o6b2o$36b o2bo4bo2bo$37b2o6b2o! #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

x = 126, y = 41, rule = B3/S23 2$b2o119b2o$bobo117bobo$2bo12b2o91b2o12bo$14bo2bo89bo2bo$15bobo39b2o7b 2o39bobo$12bo3bob2o37b2o7b2o37b2obo3bo$11bobo3bo2bo83bo2bo3bobo$11bo2b o3bobo83bobo3bo2bo$12b2obo3bo85bo3bob2o$14bobo19b2o18bo11bo18b2o19bob o$14bo2bo18b2o17bobo9bobo17b2o18bo2bo$15b2o6b2o18b2o10bobo9bobo10b2o18b 2o6b2o$23b2o18b2o11bo11bo11b2o18b2o2$58b3o3b3o2$56bo11bo$56bo11bo$37b 3o16bo11bo16b3o6$53b2o15b2o$43b3o7b2o15b2o7b3o$o6bo109bo6bo$o5bobo107b obo5bo$o5bo2bo43b2o15b2o43bo2bo5bo$7b2o44b2o15b2o44b2o5$35bo6b2o37b2o 6bo$34bobo5b2o37b2o5bobo$34bobo51bobo$35bo53bo! #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