Crystal
Classic rule · B5/S3-5
Crystalline lattices grow from dense seeds.
How the rule works
- Each cell has 26 neighbours: every cell that shares a face, an edge or a corner with it (the Moore neighbourhood).
- An empty cell comes alive when exactly 5 of its neighbours are alive.
- A live cell stays alive when 3 to 5 of its neighbours are alive; otherwise it dies.
Picking it in the app restarts the world from a random block in the middle of the box, 50% full and two thirds as wide as the box. Its seed is fixed, so it is the same world every time, one still alive 40 generations later in the default 15×15×15 box; N tries another seed.
Notation
| Birth/survival | B5/S3-5 |
|---|---|
| Softology, MCell (S/B/C/N) | 3-5/5/2/M |
| Weighted counting | B15/S9,12,15 (faces count 3, edges 2, corners 1) |
| Neighbourhood | Moore (26 cells) |
B lists the neighbour counts at which an empty cell is born, S those at which a live cell survives, and C the number of states. How to read a rule
More classic rules
- Standard
B4-5/S4-6 - Stable
B4/S4-5 - Chaotic
B3-6/S2-5 - Die-Off
B5-6/S5-6 - Explosive
B2-6/S1-6 - Pulsating
B4-6/S3-4 - Maze
B3-4/S3-4 - Sparse
B6/S5
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