Die-Off
Classic rule · B5-6/S5-6
Solid shapes thin out and vanish, but a random block spreads until about a quarter of the box churns.
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 5 or 6 of its neighbours are alive.
- A live cell stays alive when 5 or 6 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 a third 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 | B5-6/S5-6 |
|---|---|
| Softology, MCell (S/B/C/N) | 5-6/5-6/2/M |
| Weighted counting | B15,18/S15,18 (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 - Explosive
B2-6/S1-6 - Crystal
B5/S3-5 - Pulsating
B4-6/S3-4 - Maze
B3-4/S3-4 - Sparse
B6/S5
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