Moose antlers

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Moose antlers
x = 9, y = 5, rule = B3/S23 2o5b2o$o7bo$b3ob3o$3bobo$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] #C [[ ZOOM 48 ]]
Pattern type Strict still life
Number of cells 15
Bounding box 9 × 5
Frequency class 17.1
Static symmetry -c (D2_+1)
Discovered by Unknown
Year of discovery Unknown

Moose antlers (or simply antlers, or moose) is a 15-cell still life. It is composed of two fishhooks with a single cell between them.

Occurrence

See also: List of common still lifes

Moose antlers is the thirty-third most common still life in Achim Flammenkamp's census, being less common than cis-mirrored bun but more common than block on table.[1]

It is the 35th most common still life on Adam P. Goucher's Catagolue, being less common than cis-mirrored bun but more common than block on table. It is the most common still life with 15 cells, being about 7 times as common than cis-boat on dock.[2]

x = 5, y = 7, rule = B3/S23 2b2o$2b2o$2b2o$bobo$o3bo$bobo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 4 THUMBSIZE 2 ]]
The most common way by far for moose antlers to form
(click above to open LifeViewer)
RLE: here Plaintext: here

As a catalyst

There is a reaction where a 17-cell form of moose antlers gets hit eater 3-style, turning it into the 15-cell form. A domino spark restores it to its 17-cell form. A period-40 oscillator discovered by Mitchell Riley on July 26, 2022 is shown below.

x = 30, y = 24, rule = B3/S23 7bo14bo$2o4bobo12bobo4b2o$obo4bo14bo4bobo$2bo24bo$2b3o20b3o$5bo18bo$2b 3o20b3o$2bo24bo$obo7bo8bo7bobo$2o7bobo6bobo7b2o$9bobo6bobo$9b3o6b3o$9b 3o6b3o$9bobo6bobo$2o7bobo6bobo7b2o$obo7bo8bo7bobo$2bo24bo$2b3o20b3o$5b o18bo$2b3o20b3o$2bo24bo$obo4bo14bo4bobo$2o4bobo12bobo4b2o$7bo14bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 20 THUMBSIZE 2 ]]
(click above to open LifeViewer)

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.

References

  1. ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on March 30, 2010.
  2. ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on May 5, 2023.