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x = 6, y = 6, rule = B3/S23 2o$obo$b2o$3b2o$3bobo$4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Strict still life
Number of cells 12
Bounding box 6×6
Frequency class 7.6
Discovered by Unknown
Year of discovery Unknown

Ship-tie (or half-fleet) is a 12-cell still life. Its name is derived from boat-tie.


Main article: List of common still lifes

Ship-tie is the ninth most common still life on Adam P. Goucher's Catagolue, being less common than long boat but more common than barge. Among all still lifes with 12 cells, it is the absolute most common, followed by mirrored table.[1] It is also the twelfth most common object overall on Catagolue, and is the most common object for which there exists no 3-glider synthesis.

In Achim Flammenkamp's census, the ship-tie was also ranked ninth most common, again between the long boat and barge.[2]

Compared to Catagolue's typical 16×16 soups, the ship-tie is 13% more common in 8×8 soups and 8% more common in 10×10 soups. This is because fleets take up a lot of room, and if it's the only constellation in the universe, it won't hit anything else that will destroy it.


Ship-ties are almost always born in pairs, forming the fleet constellation:


Glider synthesis

x = 485, y = 31, rule = B3/S23 397bo$93bo301b2o$93bobo300b2o$93b2o2$452bo$213bo238bobo$o210b2o239b2o$ b2o209b2o$2o50b2o58b2o58b2o58b2o38b2o18b2o58b2o58b2o58b2o$51bobo57bobo 57bobo57bobo37b2o18bobo57bobo57bobo57bobo$51b2o58b2o58b2o35b2o21b2o40b o17b2o58b2o58b2o58b2o$49b2o58b2o58b2o38b2o2bobo13b2o38bo19b2o5bo52b2o 58b2o38bo19b2o$48bobo41bobo13bobo57bobo37bo4b2o13bobo37b2o18bobo4bobo 50bobo5b2o50bobo37b2o18bobo6bo$48b2o42b2o14b2o38bobo17b2o44bo13b2o5b2o 26bobo2bobo17b2o4bo2bo50b2o5bobo50b2o33bobo2bobo17b2o7bo$87bobo3bo19bo 35b2o84b2o27b2o29b2o25bobo30b2o63b3o21b2o31bo$88b2o22bobo34bo114bo57b 2o29b2o89bo$11bo76bo22bo2bo117b2o58b2o6b3o20bo28bobo118b3o3b3o$9bobo 100b2o118b2o58b2o6bo51b2o24bobo$10b2o4bo221b3o60bo77b2o96bo5b2o$14b2o 101b3o21bo96bo84b2o54bo3bobo40b3o48bo4b2o$15b2o100bo23b2o2b3o91bo84b2o 26bo30b2o41bo50bo6bo$118bo21bobo2bo177bo28bo8b3o20bo42bo$40b2o104bo 205bo8bo$39bo2bo5bo313bo$40bobo5bobo132b2o142b2o$41bo6b2o132bo2bo140b 2o$183b2o143bo$42bo136b2o$41bobo134bobo$42bo137bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 4 WIDTH 2000 ]]
Selected 2-stage 4-glider syntheses of a ship-tie
(click above to open LifeViewer)
RLE: here Plaintext: here

There are lots of 3-glider collisions that produce a ship-tie as well as junks that can be removed with another glider. Other 4-glider collisions that make a clean ship-tie are also known.

See also


  1. Adam P. Goucher. "Statistics". Catagolue. Retrieved on July 5, 2022.
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on November 8, 2009.

External links