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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 [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 42 ]]
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. The name "ship-tie" is derived from boat-tie, while "half-fleet" reflects the fact that ship-ties are almost always formed via predecessors of fleet, a constellation that is a pair of ship-ties.



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 2-glider or 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.


There are 3-glider collisions that produce a ship-tie with junk that can be removed with another glider. Other 1-stage 4-glider collisions that make a clean ship-tie are also known and can be found in Mark Niemiec's glider synthesis database.

x = 245, y = 67, rule = B3/S23 93bo$93bobo$93b2o3$213bo$o210b2o$b2o209b2o$2o50b2o58b2o58b2o58b2o$51bo bo57bobo57bobo57bobo$51b2o58b2o58b2o35b2o21b2o$49b2o58b2o58b2o38b2o2bo bo13b2o$48bobo41bobo13bobo57bobo37bo4b2o13bobo$48b2o42b2o14b2o38bobo 17b2o44bo13b2o5b2o$87bobo3bo19bo35b2o84b2o$88b2o22bobo34bo$11bo76bo22b o2bo117b2o$9bobo100b2o118b2o$10b2o4bo221b3o$14b2o101b3o21bo96bo$15b2o 100bo23b2o2b3o91bo$118bo21bobo2bo$40b2o104bo$39bo2bo5bo$40bobo5bobo 132b2o$41bo6b2o132bo2bo$183b2o$42bo136b2o$41bobo134bobo$42bo137bo10$ 157bo$155b2o$156b2o3$212bo$212bobo$212b2o2$32b2o18b2o58b2o58b2o58b2o$ 31b2o18bobo57bobo57bobo57bobo$33bo17b2o58b2o58b2o58b2o$29bo19b2o5bo52b 2o58b2o38bo19b2o$28b2o18bobo4bobo50bobo5b2o50bobo37b2o18bobo6bo$23bobo 2bobo17b2o4bo2bo50b2o5bobo50b2o33bobo2bobo17b2o7bo$24b2o29b2o25bobo30b 2o63b3o21b2o31bo$24bo57b2o29b2o89bo$52b2o6b3o20bo28bobo118b3o3b3o$52b 2o6bo51b2o24bobo$61bo77b2o96bo5b2o$83b2o54bo3bobo40b3o48bo4b2o$84b2o 26bo30b2o41bo50bo6bo$83bo28bo8b3o20bo42bo$112bo8bo$122bo$87b2o$86b2o$ 88bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 4 WIDTH 1100 HEIGHT 400 ]]
Some 2-stage 4-glider syntheses of a ship-tie
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RLE: here Plaintext: here
x = 12, y = 10, rule = B3/S23 9b2o$8bo2bo$2o6bo2bo$o8b2o$b3o$3bo2$9b2o$9bobo$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 12 X 0 Y -2 AUTOSTART GPS 12 T 0 PAUSE 2 T 58 PAUSE 1 LOOP 59 ]]
A 1G seed for the ship-tie from the octohash database
(click above to open LifeViewer)

See also


  1. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on November 8, 2009.

External links