List of Life-like rules

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The following is a list of Life-like rules. A more up-to-date and complete list can be found on Catagolue.

Rulestring Name Description
B0123478/S01234678 AntiLife The black/white reversal of Conway's Game of Life.
B0123478/S34678 InverseLife A rule by Jason Rampe, showing similar oscillators and gliders to Conway's Game of Life. The black/white reversal of B3678/S23.
B028/S0124 Invertamaze A strobing rule which makes mazes that invert themselves each generation (SEIZURE WARNING).
B08/S4 Neon Blobs A strobing rule in which patterns become neon-like explosive patterns.
B1/S012345678 H-trees An exploding rule where H-shaped branches grow from pattern borders.
B1/S014567 Fuzz An exploding rule in which solid patterns appear.
B1/S1 Gnarl A simple exploding rule by Kellie Evans that forms complex patterns from even a single live cell.
B1/S134567 Snakeskin A rule in which patterns explode and form snake-like patterns.
B12678/S15678 Solid islands grow amongst static A rule in which patterns grow exponentially and form solid patters inside static-like patterns.
B1357/S1357 Replicator A rule in which every pattern is a replicator.
B1357/S02468 Fredkin A rule in which, like Replicator, every pattern is a replicator. Also known as "Replicator 2".
B1358/S0247 Feux An explosive rule where patterns turn into replicators and flash in and out of existence.
B2/S Seeds An exploding rule by Brian Silverman in which every cell dies in every generation. It has many simple orthogonal spaceships, though it is in general difficult to create patterns that don't explode.
B2/S0 Live Free or Die An exploding rule in which only cells with no neighbors survive. It has many spaceships, puffers, and oscillators, some of infinitely extensible size and period.
B2/S13 B2/S13 An exploding rule, one of the few B2 life-like rules that has a replicator.
B2/S2345678 B2/S2345678 An exploding rule, with still lifes that may form indestructible barriers to growth, which can be used as casing for single-use wires, with which logic gates can be constructed.[1]
B234/S Serviettes[2] An exploding rule in which every cell dies in every generation (like seeds). This rule is of interest because of the fabric-like beauty of the patterns that it produces. Also known as "Persian Rug".
B25/S4 B25/S4 An exploding rule, it has a one-dimensional asymmetric replicator.
B25678/S5678 Iceballs Small masses of solid living cells flicker in and out of existence. Some reach a critical mass and begin to slowly grow. Also known as "Ice nine".
B3/S012345678 Life without death An expanding rule that produces complex flakes, featuring dense wickstretchers named "ladder". Also known as "Flakes" or "Inkspot".
B3/S023 DotLife An exploding rule closely related to Conway's Life. The B-heptomino is a common infinite growth pattern in this rule, though it can be stabilized into a spaceship.
B3/S0248 Star Trek
B3/S12 Flock Patterns tend to quickly settle into dominoes, duoplets and period 2 oscillators. There is a common period 14 shuttle oscillator involving the pre-beehive.
B3/S1234 Mazectric An expanding rule that crystalizes to form maze-like designs that tend to be straighter (ie. have longer "halls") than the standard maze rule.
B3/S12345 Maze An expanding rule that crystalizes to form maze-like designs.
B3/S1237 SnowLife
B3/S124 Corrosion of Conformity A rule similar to Mazectric but without S3. A slow burn from almost any starting pattern, resulting in a rusting away of the local continuum.
B3/S128 EightFlock
B3/S13 LowLife
B3/S2 B3/S2 This rule has 6 small still lifes, the tub, the hive, the aircraft carrier, the loaf, the mango, and the pond. However, there are no still lifes with more than 8 and less than 20 cells. There are also a few common oscillators, including the blinker and the toad, and lots of rare ones.
B3/S23 Conway's Life A chaotic rule that is by far the most well-known and well-studied. It exhibits highly complex behavior.
B3/S238 EightLife Also known as "Pulsar Life".
B3/S4567 Lifeguard 2
B3/S45678 Coral An exploding rule in which patterns grow slowly and form coral-like textures.
B34/S34 3-4 Life An exploding rule that was initially thought to be a stable alternative to Conway's Life, until computer simulation found that most patterns tend to explode. It has many small oscillators and simple period 3 orthogonal and diagonal spaceships.
B34/S35 Dance
B34/S456 Bacteria[3]
B345/S0456 Never happy An explosive rule where patterns slowly form diamond-like shapes and slowly explode.
B345/S2 Blinkers
B345/S4567 Assimilation A very stable rule that forms permanent diamond-shaped patterns with partially filled interiors. Like in 2×2, patterns made of blocks will permanently remain made of blocks.
B345/S5 Long Life A stable rule that gets its name from the fact that it has many simple extremely high period oscillators.
B34568/S15678 Spiral and polygonal growth A rule with "plow" structures that move along an edge of a polygon, increasing its size (turning corners and thickening it as they go), corner-extenders that create these in their wake, and nontrivial interactions based on these (such as a 16-cell methuselah that takes 12127116559 generations to become a period-2 oscillator)[4]
B3457/S4568 Gems An exploding rule with many smaller high-period oscillators and a c/5648 spaceship.
B34578/S456 Gems Minor An exploding rule with many smaller high-period oscillators and a c/2068 spaceship.
B35/S23 Grounded Life A stable rule "one outer-totalistic condition away from Life", where neither of the standard spaceships works, and the most common spaceship is an orthogonal 2c/5 spaceship called "Glider 3736".
B35/S234578 Land Rush Expanding chaos organizing itself into plowed fields.
B35/S236 B35/S236 An exploding rule explored by Dean Hickerson and David Eppstein.[5]
B3567/S15678 Bugs[3]
B35678/S34567 Cheerios An explosive rule where patterns explode while "cheerios" form in the chaotic mess.
B35678/S4678 Holstein[6] A rule symmetric under on-off reversal. Black regions are surrounded by froth and tend to eventually collapse starting from the corners, but can be stabilized in various ways by oscillators on their boundaries. There are also three known spaceships.
B35678/S5678 Diamoeba A chaotic pattern that forms large diamonds with chaotically oscillating boundaries. Known to have quadratically-growing patterns. Like in 2×2, patterns made of blocks will permanently remain made of blocks.
B357/S1358 Amoeba A chaotic rule that is well balanced between life and death; it forms patterns with chaotic interiors and wildly moving boundaries.
B357/S238 Pseudo Life A chaotic rule with evolution that resembles Conway's Life, but few patterns from Life work in this rule because the glider is unstable.
B3578/S24678 Geology A very well-balanced and chaotic rule that forms large "continents" of live cells surrounded by chaos at a roughly 50% density, but they eventually erode away into smaller "islands". It is symmetric under on-off reversal.
B36/S12 HighFlock
B36/S125 2×2 A chaotic rule with many simple still lifes, oscillators and spaceships. Its name comes from the fact that it sends patterns made up of 2 × 2 blocks to patterns made up of 2 × 2 blocks.
B36/S128 IronFlock
B36/S23 HighLife A chaotic rule very similar to Conway's Life that is of interest because it has a simple replicator.
B36/S234578 Land Rush 2 An exploding rule that got confused with Land Rush, likely due to a typo. It does contain a period 4 orthogonal c/2 ship.
B36/S235 Blinker Life An exploding rule where the T-tetromino is a blinker puffer, appropriate because it evolves into traffic light in Life, also made of blinkers.
B36/S238 IronLife
B36/S245 Sqrt replicator rule Name comes from a dirty orthogonal replicator.
B367/S125678 Slow Blob
B367/S23 DrighLife A mix between DryLife and HighLife
B3678/S1258 2x2 2
B3678/S135678 Castles A rule where patterns almost explode into castle-like stable patterns.
B3678/S23 B3678/S23 Black/white reversal of InverseLife.
B3678/S235678 Stains A stable rule in which most patterns tend to "fill in" bounded regions. Most nearby rules (such as coagulations) tend to explode.
B3678/S34678 Day & Night A stable rule that is symmetric under on-off reversal. Many patterns exhibiting highly complex behavior have been found for it.
B368/S12578 B368/S12578 An exploding 2x2-like rule with a small 4c/13o replicator, of which guns and W110 unit cells had been constructed [7]
B368/S128 LowFlockDeath
B368/S236 Life SkyHigh A rule that is similar to HighLife but adds a B8 and S6 to the rulestring, hence, the name "SkyHigh".
B368/S238 LowDeath HighLife's replicator works in this rule, albeit with a different evolution sequence due to the result of B38/S23's "pedestrian" effect.
B368/S245 Morley A rule in which random patterns tend to stabilize extremely quickly. Has a very common slow-moving spaceship and slow-moving puffer. Also known as "Move".
B37/S012345678 DryLife without Death
B37/S12 DryFlock
B37/S1234 Mazectric with Mice Some "mice" run back and forth in the halls of the maze.
B37/S12345 Maze with Mice Similar to B37/S1234, some "mice" run back and forth in the continually-stretching halls of the maze.
B37/S23 DryLife An exploding rule closely related to Conway's Life, named after the fact that standard spaceships bigger than the glider do not function in the rule. Has a small 9c/28 orthogonal puffer based on the R-pentomino, which resembles the switch engine in the possibility of combining several to form a spaceship.
B378/S012345678 Plow World An explosive rule, some of the patterns can turn into wickstretchers.
B378/S235678 Coagulations An exploding rule in which patterns tend to expand forever, producing a thick "goo" as it does so. Suprisingly, Coagulations actually has one less birth condition than Stains.
B38/S012345678 Pedestrian Life without Death
B38/S12 Pedestrian Flock A mix between Pedestrian Life and Flock
B38/S128 HoneyFlock
B38/S23 Pedestrian Life A close Life variant with a number of distinctive natural growth patterns and (5,2)c/190 oblique spaceships.
B38/S238 HoneyLife
B45/S12345 Electrified Maze
B45/S1235 Oscillators Rule[8] Random patterns shrink to tiny oscillators, with periods anywhere between 1 ("still lifes") and 16. Larger periods are rare.
B45678/S2345 Walled cities A stable rule by David Macfarlane that forms centers of pseudo-random activity separated by walls.
B45678/S5678 Majority[3]
B4678/S35678 Vote 4/5[9] A modification of the standard Gérard Vichniac voting rule, also known as "Anneal", used as a model for majority voting.
B48/S234 Lifeguard 1
B56/S14568 Rings 'n' Slugs A rule in which patterns stabilize into "Rings" and "Slugs".
B5678/S45678 Vote[9] Standard Gérard Vichniac voting rule, also known as "Majority", used as a model for majority voting.

See also


External links