Eater head siamese eater tail

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Eater head siamese eater tail
x = 7, y = 4, rule = B3/S23 2o3b2o$bo4bo$bob3o$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 57 ]]
Pattern type Strict still life
Number of cells 12
Bounding box 7 × 4
Frequency class 19.9
Discovered by Robert Wainwright
Everett Boyer
Year of discovery 1973

Eater head siamese eater tail (or eater siamese eater, or eater with nine) is a 12-cell still life.

Occurrence

See also: List of common still lifes

Eater head siamese eater tail is the fifty-eighth most common still life in Achim Flammenkamp's census, being less common than cis-boat on dock but more common than cis-block on long bookend.[1]

It is the 57th most common still life on Adam P. Goucher's Catagolue, being less common than trans-bookend and bun but more common than block on cover. It is the 5th most common still life with 12 cells, being less common than trans-block on long bookend but more common than block on cover.[2]

The octo3obj database contains 19 matches for collisions with the still life present in the ash.

Construction

Four gliders suffice to construct this still life.[3] Different known syntheses can be found in Mark Niemiec's database.[4]

x = 23, y = 22, rule = B3/S23 o$b2o$2o3$15b2o$15bobo$15bo3$8b3o$10bo$9bo7$20b2o$20bobo$20bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 10 X 0 Y -2 AUTOSTART GPS 12 T 0 PAUSE 3 T 88 PAUSE 2 LOOP 89 ]]
A 4G synthesis[3]
(click above to open LifeViewer)
x = 90, y = 29, rule = B3/S23 43b2o$43b2o$2o$obo56b3o17b3o$2bo$2b2o38bo45b2o$3bo38bo21b2o18b2o2b2o$ 3o20bo18bo21b2o18b2o$o22bobo9b3o$15bo7b2o$15bo49bo19bo$15bo49bo19bo$ 20bo44bo19bo$19bobo$19bobo$20bo$13b3o4$58bo$57b2o$57bobo4$49b2o18b2o$ 50b2o18b2o$49bo19bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 6 AUTOSTART GPS 12 T 0 PAUSE 3 T 96 PAUSE 2 LOOP 97 ]]
Four 1G seeds from the octo3obj database
(click above to open LifeViewer)


See also

References

  1. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  2. Adam P. Goucher. "Statistics". Catagolue. Retrieved on May 5, 2023.
  3. 3.0 3.1 xs12_178c453 on Catagolue
  4. The 121 twelve-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 12/12-85.rle)

External links