Roteightor

Roteightor
bo12b$b3o8b2o$4bo7bob$3b2o5bobob$10b2o2b2$6b2o6b$5b2obo5b$6b3o5b$2b2o 3b3o4b$bobo5b2o3b$bo7bo4b$2o8b3ob$12bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 LOOP 8 THUMBSIZE 3 ZOOM 27 WIDTH 480 HEIGHT 480 ]]
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Pattern type	Oscillator
Number of cells	35
Bounding box	14 × 14
Period	8 (mod: 2)
Heat	11.0
Volatility	0.63 | 0.63
Kinetic symmetry	nrk
Discovered by	Robert Wainwright
Year of discovery	1972
Rules Outer-totalistic rules B3/S23 – B368/S02378 # of rules 25 = 32 Isotropic rules B3aijq/S2-in3ijnr – B2cik34-ajn5-aq67e8/S0234-ajw5-nqy6-k78
Glider synthesis Fewest gliders 27† Catagolue-generated RLE synthesis Uploaded synthesis RLE roteightor_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext roteightor.cells RLE roteightor.rle
Identifiers apgcode xp8_032acy1oge2zwggseb6z4701y1354c Pentadecathlon ID 35P8.1

Roteightor is a period-8 oscillator with 35 cells. It was discovered by Robert Wainwright in 1972. It consists of four eater 1s hassling a fleet predecessor that resembles a standard spaceship of length 3, sometimes called an underweight spaceship (UWSS). It can also be extended as an agar, as noted by Dean Hickerson in January 1990, to make a family of oscillators called multiple roteightors. The eater 1s can individually be replaced with eater 2s.

x = 32, y = 32, rule = B3/S23 20bo$8b2o8b3o$9bo7bo$9bobo5b2o$10b2o13bo$23b3o$4b2o8b3o5bo$5bo7bo2bo6b o$5bobo8bo2bo3bo6bo$6b2o2bo4bo2bo9b3o$9bo8bo2bo5bo$2o7bo2bo5b3o6b2o$bo 7b3o$bobo$2b2o20b3o$15b3o5bo2bo$6b3o5bo2bo8bo$5bo2bo8bo2bo4bo2b2o$8bo 2bo4bo2bo8bobo$3bo3bo2bo8bo2bo7bo$3bo6bo2bo5b3o8b2o$4bo5b3o$b3o20b2o$b o22bobo$8b2o6b3o7bo$9bo5bo2bo7b2o$6b3o9bo$6bo6bo3bo2b2o$13bo6bobo$14bo 7bo$11b3o8b2o$11bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 Z 12 HEIGHT 480 GPS 2 AUTOSTART LOOP 8 ]]

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

Etymology

The roteightor is period eight, the rotor appears to rotate, and in an extended roteightor with the underweight spaceships in their dense phases the UWSSs that touch resemble black eights.

As a spaceship

In 2020, Aleph extended the UWSS to a stable 2c/4 spaceship with a minimum population of 79 cells:

x = 18, y = 16, rule = Immigration 8.3B$4.A3.B2.B2.A$3.3A2.B4.3A$2.A2.2A2.B5.2A$.3A.A6.A4.A$7.A.A.A.3A.A $3.A.A.A2.2A3.A$2.A4.A.A.A$3.2A4.A5.3A$2A7.A5.A.A$3A5.A5.2A.A$.3A4.A 5.2A$3.2A3.A$3.2A3.A3.A.2A$8.A$9.A.A! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ TRACK 0 -1/2 GPS 2 ZOOM 20 HEIGHT 600 AUTOSTART LOOP 4 ]]

the 79 cell extension found by Aleph. (click above to open LifeViewer) Catagolue: here

See also

• Four eaters hassling lumps of muck
• Dinner table
• Honey thieves

External links

• Roteightor at the Life Lexicon

• Multiple roteightors at the Life Lexicon

• Roteightor at Adam P. Goucher's Catagolue

• 35P8.1 at Heinrich Koenig's Game of Life Object Catalogs