Boat tie eater tail

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Boat tie eater tail
x = 5, y = 7, rule = B3/S23 b2o2b$bobob$3bob$3b2o$b2o2b$obo2b$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Strict still life
Number of cells 12
Bounding box 5 × 7
Frequency class 21.3
Discovered by Robert Wainwright
Everett Boyer
Year of discovery 1973

Boat tie eater tail is a 12-cell still life.

This still life is comprised of the normally stable boat having been tied to the normally stable eater 1. This is one of two possible ties, in which the boat is attached to the "tail" segment of the eater; the other possible version, boat tie eater head, has the boat attached to the "head" segment of the eater instead.

Glider synthesis

Four gliders suffice to construct this still life; two 4G syntheses are shown below. Several other known syntheses can be found in Mark Niemiec's database.[1]

x = 45, y = 34, rule = B3/S23 bo25bobo$2bo24b2o$3o25bo3$11bo$10bo16b3o$10b3o14bo$28bo10$16b3o$16bo$b 3o13bo$3bo$2bo7$12b2o$11bobo$13bo29bo$42b2o$42bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 8 X 0 Y -4 AUTOSTART GPS 12 T 0 PAUSE 3 T 98 PAUSE 2 LOOP 99 ]]
Four-glider syntheses[1] (click above to open LifeViewer)


Main article: List of common still lifes

Boat tie eater tail is the seventy-ninth most common still life in Achim Flammenkamp's census, being less common than trans-boat on dock, but more common than trans-snake on bun.[2] It is also the ninety-fourth most common object on Adam P. Goucher's Catagolue.[3]

The still life occurs in final patterns of three collisions in the octo3obj database.[4]

See also


  1. 1.0 1.1 The 121 twelve-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 12/12-7.rle)
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  3. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
  4. Headerless RLEs of the three collisions are:

External links