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x = 6, y = 6, rule = B3/S23 bo$obo$b2o$3b2o$3bobo$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Strict still life
Number of cells 10
Bounding box 6×6
Frequency class 13.7
Discovered by Unknown
Year of discovery 1972

Boat-tie (or boat tie boat) is a 10-cell still life whose name is a pun on "bow tie" and is a combination of two boats.


Boat-tie is the twentieth most common still life on Adam P. Goucher's Catagolue, being less common than shillelagh but more common than snake. Among all still lifes with 10 cells, it is the absolute most common, followed by very long ship.[1] It is also the twenty-seventh most common object overall on Catagolue.

Boat-tie is also the twentieth most common still life in Achim Flammenkamp's census, being less common than integral sign but more common than snake.[2]


Two copies of boat-tie can be seen in a symmetric constellation that evolves from two traffic light predecessors. This constellation is in the ash of a 3-glider collision that is essentially a glider crashing into a B-heptomino.

x = 8, y = 7, rule = B3/S23 bo$3o4$6bo$5b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 10 THUMBSIZE 2 ]]
Two T-tetromino react to make two copies of boat-tie
and four blinkers. Other traffic light predecessors also work.
(click above to open LifeViewer)
RLE: here Plaintext: here

Glider synthesis

There is a 3-glider collision that produces a constellation of a boat-tie and a loaf, leading to a two-stage 4-glider synthesis for the still life. Other 4-glider collisions that make a clean boat-tie are also known.

See also


  1. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 17, 2022.
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on November 7, 2009.

External links