Searching for Spaceships (2002) [4 citations — 0 self]
by
David Eppstein
MORE GAMES OF NO CHANCE
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@INPROCEEDINGS{Eppstein02searchingfor,
author = {David Eppstein},
title = {Searching for Spaceships},
booktitle = {MORE GAMES OF NO CHANCE},
year = {2002},
pages = {4003},
publisher = {Publications. Cambridge Univ. Press}
}
author = {David Eppstein},
title = {Searching for Spaceships},
booktitle = {MORE GAMES OF NO CHANCE},
year = {2002},
pages = {4003},
publisher = {Publications. Cambridge Univ. Press}
}
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Abstract:
We describe software that searches for spaceships in Conway's Game of Life and related two-dimensional cellular automata. Our program searches through a state space related to the de Bruijn graph of the automaton, using a method that combines features of breadth first and iterative deepening search, and includes fast bit-parallel graph reachability and path enumeration algorithms for finding the successors of each state. Successful results include a new 2c/7 spaceship in Life, found by searching a space with 2^126 states.
