Long ship

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Long ship
x = 4, y = 4, rule = B3/S23 2o$obo$bobo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Strict still life
Number of cells 8
Bounding box 4×4
Frequency class 13.3
Discovered by JHC group
Year of discovery 1970

Long ship is an 8-cell still life discovered by the JHC group in 1970[1] and is the first extension of ship.

Long ship is the smallest still life by bounding box for which there is no clean one-glider destruction. In terms of population it ties with canoe.[2]

Commonness

Long ship is the seventeenth most common still life on Adam P. Goucher's Catagolue, being less common than paperclip but more common than integral sign. Among all still lifes with 8 cells, it is the fourth most common, being less common than long barge but more common than shillelagh.[3] It is also the twenty-fourth most common object overall on Catagolue.

Long ship was also the seventeenth most common still life in Achim Flammenkamp's census, being less common than paperclip, but more common than shillelagh.[4]

Occurrence

A long ship can be created when a traffic light predecessor hits a tub. By itself, it does not survive long, but it can survive in a soup if there are nearby active regions.

x = 7, y = 5, rule = B3/S23 o$2o$o4bo$4bobo$5bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 8 THUMBSIZE 2 STOP 15 ]]
The reaction described above
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RLE: here Plaintext: here

Glider synthesis

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

In other rules

Unlike the regular ship, this survives in HighLife due to the lack of any B6 regions.

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
  2. gameoflifeboy (November 6, 2015). Re: Gustavo Ramos Rehermann's patterns (discussion thread) at the ConwayLife.com forums
  3. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 17, 2022.
  4. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.

External links