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x = 6, y = 6, rule = B3/S23 4b2o$3bobo$3bo$b3o$o$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Strict still life
Number of cells 11
Bounding box 6×6
Frequency class 19.1
Discovered by Unknown
Year of discovery Unknown

Elevener (or gull[1] or intentionless[2]) is an 11-cell still life. It consists of two siamesed eater 1s that share three cells of their tails while retaining both their glider-eating and boat-bit-catching capabilities.


Elevener is the forty-seventh most common still life in Achim Flammenkamp's census (the second-most common of its size, after the boat tie ship), being less common than cis-mirrored bookend but more common than block on cap.[3] It is also the fifty-sixth most common object on Adam P. Goucher's Catagolue.[4]

Glider synthesis

An elevener can be formed by applying a banana spark to the tail of an eater 1; as both the eater 1 and the component cost two gliders, a total of four gliders are needed to synthesize an elevener. There is also a 3-glider collision that produces a constellation of an elevener, a block and a beehive, leading to another two-stage 4-glider synthesis for the still life.

In other rules

In HighLife, the elevener is almost 60 times more common than it is in Life. In B34e/S23, it is even more common, as fleet predecessors evolve into two eleveners instead of two ship-ties.

See also


  1. "Gull". The Life Lexicon. Stephen Silver. Retrieved on April 24, 2009.
  2. "Intentionless". The Life Lexicon. Stephen Silver. Retrieved on June 13, 2009.
  3. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  4. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.

External links