This week's featured article
|HighLife is a Life-like cellular automaton in which cells survive from one generation to the next if they have 2 or 3 neighbours, and are born if they have 3 or 6 neighbours; that is, it has rulestring "B36/S23". It was named by John Conway and was first considered in 1994 by Nathan Thompson. It is mainly of interest due to a simple replicator that it allows.
Because its rulestring is so similar to that of Conway's Game of Life, many simple patterns exhibit the same behavior in both rules; it's only when patterns get complex that their behavior differs. Nonetheless, it exhibits such rich structure that Conway himself stated
All of the most common still lifes, oscillators and spaceships from the standard Life rules behave the exact same under the HighLife rules, including the block, beehive, blinker, glider, lightweight spaceship, middleweight spaceship, and heavyweight spaceship. On the other hand, even though traffic lights and honey farms themselves behave the same in both rules, they do not occur naturally in HighLife with any sort of regularity due to their common predecessors being unstable.
"It seems to me that 'B36/S23' is really the game I should have found, since it's so rich in nice things."
In the news
- January 10: Alex Greason makes available a fresh set of transfer.py results. Fewer than 535 20-bit still lifes have no known glider synthesis, and 135 of these have soups available on Catagolue to assist with synthesis.
- January 10: Dylan Chen discovers 328P7H3V0, another new 3c/7 spaceship, using Andrew J. Wade's December update to LSSS. This is the first small 3c/7 spaceship with gutter symmetry.
- January 9: Rob Liston discovers 50093M, the longest-lasting known methuselah within a 16×16 bounding box, using apgsearch.
- January 5: Bullet51 uses ikpx2 to find a third elementary c/6 diagonal spaceship, 282P6H1V1.
- January 5: Martin Grant discovers a new variant of a known H-to-G conduit, NE16T14, with likely applications as a reflector and merge circuit in single-channel self-constructing circuitry.
- January 5: Sphenocorona and Luka Okanishi assemble a new elementary conduit, HF96P, which allows for the creation of several new Herschel-to-glider converters.
- January 2-3: bubblegum discovers a new 3c/7 orthogonal puffer engine, allowing Matthias Merzenich and iNoMed to construct the first clean 3c/7 rake.
|The LifeWiki contains one of the most comprehensive catalogues of patterns available on the internet. Within it you will find: