Trans-boat with tail

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Trans-boat with tail
x = 5, y = 5, rule = B3/S23 2o$obo$bobo$3bo$3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 48 ]]
Pattern type Strict still life
Number of cells 9
Bounding box 5 × 5
Frequency class 14.9
Discovered by Unknown
Year of discovery 1971

Trans-boat with tail is a 9-cell still life. It was found in 1971.[1]

This still life is comprised of the normally stable boat with a normally unstable tail attached. This is one of two possible isomers, named trans due to the corner part of the boat facing outwards from the tail; the other isomer, cis-boat with tail, has this corner part tucked inwards.


Main article: List of common still lifes

Trans-boat with tail is the twenty-fourth most common still life in Achim Flammenkamp's census, being less common than bi-pond but more common than hat.[2]

It is the 24th most common still life on Adam P. Goucher's Catagolue, being less common than bi-pond but more common than boat tie ship. It is the 2nd most common still life with 9 cells, being less common than integral but more common than hat. Compared to the cis-boat with tail, the trans-boat with tail is about 17 times as common.[3]

Glider synthesis

All strict still lifes with a population of 21 or fewer cells, all oscillators with 16 or fewer cells, and all spaceships with 31 or fewer cells are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.

See also


  1. Robert Wainwright (September 1971). Lifeline, vol 3, page 2.
  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 May 5, 2023.

External links