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the wiki for Conway's Game of Life.
Currently contains 2,141 articles.
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This week's featured article

Caterloopillar diagram small.png

Caterloopillar is the name given to a family of spaceships containing two major parts - the front and the back. In Caterloopillar each part has the properties of a universal constructor, and thus each part is constructing the building blocks of the other part, while also reading and moving a construction tape. As the name suggests, this creates somewhat paradoxical design, similar to the "strange loop" concept.

The basic Caterloopillar design can be trivially adapted to produce spaceships with an infinite number of different speeds -- in theory, any rational speed strictly less than c/4.

The Caterloopillar was voted the Pattern of the Year 2016 on ConwayLife.com.

In the news

Pattern collection

The LifeWiki contains one of the most comprehensive catalogues of patterns available on the internet. Within it you will find:
Download.gif Download pattern collection
2 MB .zip archive containing the 1500+ RLE pattern files used on the wiki

Did you know...

  • ... that Garden of Eden patterns with only 45 ON cells have been found?
  • ... that it is known that no Garden of Eden patterns exist that are 1, 2, or 3 cells high, but that it is currently an open question whether a 4-cell-high GoE can be constructed?
  • ... that 6-cell-high Garden of Eden patterns were constructed as far back as 1973, but 5-cell-high GoEs were unknown until Steven Eker found some in 2016?
  • ... that in 2016, patterns were found that have great-great-grandparents but no great-great-great-grandparents?
  • ... that no way is known for a 3×3 pattern to be tiled into an M×N rectangle to produce a Garden of Eden, but that there are 4×3, 4×4 and larger tiles that can be repeated in this way to produce GoEs?
  • ... that there are spaceship stabilizations of agars?
  • ... that block is the only known finite strict still life where each living cell has exactly 3 neighbours?
  • ... that all strict still lifes up to and including 14 cells have been found by apgsearch in asymmetrical 16×16 soups?
  • ... that c/2 orthogonal and c/4 diagonal were the only speeds of spaceships seen to emerge from asymmetric soups on Catagolue until 2020?
  • ... that all currently known standard Herschel conduits produce the same Herschel great-grandfather pattern, except for Fx158?          
Showing 10 items out of 104 More did you know...