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Revision as of 19:36, 15 February 2020

Welcome to LifeWiki,
the wiki for Conway's Game of Life.
Currently contains 2,159 articles.
Overview · How to contribute · ConwayLife.com Image gallery · A–Z index

This week's featured article

DemonoidUCselfdestruct.png

Demonoid is the first type of self-constructing diagonal spaceship in the B3/S23 rule. A small "0hd Demonoid" was completed by Chris Cain in December 2015, shortly after a much larger 10hd version constructed in November in collaboration with Dave Greene.

The 0hd spaceship displaces itself by 65 cells diagonally every 438,852 generations. As of 2018 it is the only case where a spaceship gun pattern was completed before the actual spaceship -- the first 0hd Demonoid was fired by a gun. Unlike its Gemini predecessor, removal of old construction arms is not done by a separate destruction arm, but rather by "self-destruct circuitry" -- a scattering of still lifes that allow a single glider to cleanly destroy the entire mechanism, as shown at right.

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 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 are the only speeds of spaceships seen to emerge from asymmetric soups on Catagolue?
  • ... that all currently known standard Herschel conduits produce the same Herschel great-grandfather pattern, except for Fx158?
  • ... that eater 1 is the smallest asymmetric still life?
  • ... that in Life, no spaceship can exist with a speed of (m,n)c/x where (m+n)/x > 0.5?
  • ... that even without using fixed-cost reverse caber tosser technology, an N-bit strict still life – specifically, some length of long long (...) boat or bargecan be constructed for any odd integer N using no more than 34 gliders, and for any even integer N using no more than 33 gliders, using a temporary tubstretcher?
  • ... that even without using fixed-cost reverse caber tosser technology, an N-bit period-2 oscillator can be constructed for any odd integer N using no more than 45 gliders, and for any even integer N using no more than 46 gliders, using a temporary tubstretcher?
  • ... that it is currently an open question as to if there exists a periodic pattern whose only predecessors are its own evolutionary sequence?          
Showing 10 items out of 102 More did you know...