Snake

Snake
x = 4, y = 2, rule = B3/S23 ob2o$2obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]]
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Pattern type	Strict still life
Number of cells	6
Bounding box	4 × 2
Frequency class	13.9
Static symmetry	Unspecified
Discovered by	JHC group
Year of discovery	1970
Rules Outer-totalistic rules B/S23 – B35678/S012345678 # of rules 212 = 4096 Isotropic rules B/S2ae3n – B2-ac34-r5678/S012345678
Glider synthesis Fewest gliders 4 Catagolue-generated RLE synthesis Uploaded synthesis RLE snake_synth.rle
Pattern files Plaintext snake.cells RLE snake.rle
Identifiers apgcode xs6_bd Pentadecathlon ID 6.1

Snake is a 6-bit still life. It was discovered by the JHC group in 1970.

Use as a rock

The snake can act as a rock. An example is shown below in Conduit 1.

x = 24, y = 13, rule = B3/S23 b2o$2bo$bo$b2o6$o3b2o15bo$2o2b2o15bo$b2o18b3o$2o21bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 20 THUMBSIZE 2 AUTOSTART T 0 PAUSE 2 T 59 PAUSE 1 LOOP 60 ]]

Conduit 1, showing the snake as a rock catalyst (click above to open LifeViewer) RLE: here Plaintext: here

Use as an induction coil

A snake is the cheapest way in both population and bounding box to stabilize a line of three cells, such as in cauldron, and the cheapest in bounding box but not population for a line of five, such as in the rectifier. Snakes are also the most efficient way to stabilize certain non-flat regions such as those in 55P10 and 28P7.2, although aircraft carriers also work for this purpose.

Commonness

Main article: List of common still lifes

Snake is the twenty-first most common still life in Achim Flammenkamp's census, being less common than boat-tie but slightly more common than big S. It is also the twenty-eighth most common object on Adam P. Goucher's Catagolue. It is the rarest of the five 6-bit still lifes.

The snake is about twice as common in C2_4 (the symmetry it has) compared to asymmetric soups.

Glider synthesis

All strict still lifes with a population of 23 or fewer cells, all oscillators with 16 or fewer cells, and all spaceships with 35 or fewer cells are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.

On February 20, 2022, a method was found to construct pseudo still lifes consisting of an arbitrarily large stack of snakes. These objects were previously notoriously difficult to synthesize – xs18_bd0db0bd, consisting of a stack of three snakes, formerly cost 67 gliders to construct, making it by far the most expensive pseudo still life with 18 cells.

Extensibility

Snake can be infinitely extended, as illustrated below:

• 
  Long snake
• 
  Very long snake
• 
  Long^3 snake
• 
  Long^4 snake
• 
  Long^5 snake
• 
  Long^6 snake

See also

• Aircraft carrier
• Snake siamese snake
• Snake bridge snake
• Silver's p5, period 5 oscillator
• Rattlesnake, period 11 oscillator

External links

• Snake at the Life Lexicon
• Snake at Adam P. Goucher's Catagolue
• The 5 six-bit still-lifes at Mark D. Niemiec's Life Page