Rattlesnake

Rattlesnake
x = 13, y = 15, rule = B3/S23 8b2o$8bo$9bo$8b2o4$5bo$5b2o$2obobob3o$ob2obobobo$6bo2b3o$7b2o3bo$9b3o$ 9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 4 THUMBSIZE 3 ZOOM 21 HEIGHT 480 ]]
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Pattern type	Oscillator
Number of cells	33
Bounding box	13 × 15
Period	11
Mod	11
Heat	5.82
Volatility	0.51
Strict volatility	0.51
Discovered by	Dean Hickerson
Year of discovery	2016
Rules Outer-totalistic rules B3/S23 – B38/S2378 # of rules 23 = 8 Isotropic rules B3-y/S23 – B34ceqt5ci6cen7c8/S234cekqry5-cqy6-a78
Glider synthesis Fewest gliders 25† Catagolue-generated RLE synthesis Uploaded synthesis RLE rattlesnake_synth.rle †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext rattlesnake.cells RLE rattlesnake.rle
Identifiers apgcode xp11_y0dbzggci5ld3xog8oz0343 Pentadecathlon ID 33P11.1

Rattlesnake is a period-11 oscillator (so named because it has 11 letters and a snake for a rock) found by Dean Hickerson in a drifter search on January 10, 2016. In terms of its 33 cells, it is currently tied for the smallest known period 11 oscillator with diamondback. It gives two dot sparks, one on the right and one on the left, and this allows the construction of non-trivial higher-period oscillators as seen in the next section.

Martin Grant found a 37-glider synthesis of this oscillator no later than January 13, 2016. Tanner Jacobi improved the synthesis of the base still life by four gliders in April 2021. More reduction has since brought the cost down to 25 gliders (see the Catagolue-generated synthesis RLE in the infobox).

LCM oscillators

The LCM oscillators below are listed due to being the smallest known ones by population, while also satisfying the condition that at least one cell oscillates at the full period. The oscillators are shown with visible envelopes, to highlight interactions between subpatterns.

5bo$5bo$5bo$4b2o$2bo$bo4bo3b2o$bo7bobo$3b3o3bo$8b2o4$5bo$5b2o$2obobob 3o$ob2obobobo$6bo2b3o$7b2o3bo$9b3o$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 15 ZOOM 16 THUMBSIZE 2 HEIGHT 400 THEME Book STARTFROM 33 ]]

46P33 with caterer (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

4bo4b2o$2b2obo3bo$bo8bo$obo2bo3b2o$o2bo$b2o2$6bo$6b2o$b2obobob3o$bob2o bobobo$7bo2b3o$8b2o3bo$10b3o$10bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 20 ZOOM 16 THUMBSIZE 2 HEIGHT 400 THEME Book STARTFROM 44 ]]

45P44 with mold (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

11b2o$12bo$9b2o2$7bobo2$5bobo$10b2o$3bobo3bobo$3bo5bo$bo6b2o$b2o3$5bo$ 5b2o$2obobob3o$ob2obobobo$6bo2b3o$7b2o3bo$9b3o$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 25 ZOOM 16 THUMBSIZE 2 HEIGHT 400 THEME Book STARTFROM 55 ]]

49P55 with pseudo-barberpole (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

x = 28, y = 16, rule = B3/S23 18bo$16b3o$15bo3b2o$16b3o2bo$18bobobob2obo$19bo2bobob2o$18bo2b2o$7bo4b 2o9bo$5bobo4bobo2bo$3bo2bo6b3o6bo$2b3obobo5b2o$b2o3b4o3b2o3b2o$2o5bob ob3o4bo$3o6bo2bo6bo$bobo4bobo7b2o$2b2o4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 35 ZOOM 16 THUMBSIZE 2 HEIGHT 400 THEME Book STARTFROM 77 ]]

67P77 with 34P7 (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

8b2o8b2o$8bo7bob2o$9bo5bo$8b2o8bo$14b2obo$14b2o2$5b2o$5bob2o$2obobobob o$ob2obobo$6bo2b3o$7b2o3bo$9b3o$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 40 ZOOM 16 THUMBSIZE 2 HEIGHT 400 THEME Book STARTFROM 88 ]]

45P88 with figure eight (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

x = 22, y = 19, rule = B3/S23 6bo$5bobo2b2o$5bobo3bo$3b2obob3o$2bobo3bo$bo4bo$2b3ob2o7b2o$10b2o3bo$ 2b2ob2o3b2o5bo$o2bob2o9b2o$2obo$3bo10b4o$3b2o10bo2bo$7b2o7b2obo$7bo2bo 5bo2bo$9b2o5b3ob2o$18bobo$18bobo$19bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 45 ZOOM 16 THUMBSIZE 2 HEIGHT 400 THEME Book STARTFROM 99 ]]

75P99 with 42P9 (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

x = 15, y = 18, rule = B3/S23 4b2o$5bo$4bo$4b2o2$4b4o$3bo3bo$2bob3o$2bo3bo4bob2o$2obobo5b2obo$bobo$bobo$2bo 3$6b8o$6bob4obo$6b8o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 40 ZOOM 16 THUMBSIZE 2 HEIGHT 400 THEME Book Y 1 STARTFROM 165 ]]

45P165 with pentadecathlon (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

x = 34, y = 32, rule = B3/S23 30bo$30b3o$28b2o3bo$27bo2b3o$21bob2obobo$21b2obobobobo$26bob2o$26b2o2$ o$3o$3bo25b2o$2b2o26bo$29bo$29b2o2$19bo$b3o3b3o8b2o$17bo$5bo12b2o$5bo 13bo$5bo5$14b2o8b2o$14bo2b6o2bo$15b2o6b2o$12b3o10b3o$12bo2bobo4bobo2bo $13b2o4b2o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 12 HEIGHT 500 ]]

90P836 with p76 pi-heptomino hassler (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here

External links

• Rattlesnake at the Life Lexicon
• Rattlesnake at Adam P. Goucher's Catagolue
• 33P11.1 at Heinrich Koenig's Game of Life Object Catalogs
• Rattlesnake at Wikipedia (name origin)