This week's featured article

A switch engine is a methuselah that was found by Charles Corderman in 1971. It is unstable by itself, but it can be used to make c/12 diagonal puffers and spaceships.
There are two basic types of stabilized switch engine, both of which were also found by Charles Corderman: the period 288 blocklaying switch engine (the more common of the two) and period 384 gliderproducing switch engine. These two puffers are the most natural infinite growth patterns in Life, being by far the most common ones to occur from nonsymmetric random starting patterns.

In the news

 February 26: Keith Amling discovers a period6 c/2 greystretcher in which the stripes are bounded by coiled snakes.
 February 24: P1GG completes a nonperioddoubling stabilization of iNoMed's p19 partial, which also allows for a stabilization of the wick. The result is goban, the second known period19 oscillator. EvinZL notes that there are two variants with slightly different connection points.
 February 23: Period1GliderGun (P1GG) discovers that a period19 partial result by iNoMed can be completed with a perioddoubling catalyst, giving a period38 oscillator. May13 notices that the p19 component can be extended to form a wick.
 February 23: Keith Amling discovers two different c/2 orthogonal stretchers for a pair of coiled snakes.
 February 18: Period1GliderGun notices that a previously unrecognized pattern by Mitchell Riley from September 7, 2022 is actually a complete period171 oscillator and is in fact the smallest known p171 oscillator.
 January 29February 2: Keith Amling, with some help from Matthias Merzenich, discovers new c/4 diagonal spaceships ([1], [2], [3]) capable of eating a variety of objects including ships, blocks, boats, beacons, beehives, barges, loaves, tubs, toads, and mangoes.
 January 2628: Goldtiger997 completes a 259glider synthesis of 77P6H1V1, making it the first c/6 diagonal spaceship to be synthesized.
 January 22: iNoMed discovers the first true period53 glider gun based on a partial result by goldenratio.
 January 20: Adam P. Goucher proves that every finite phoenix has period 2.
 January 1415: Keith Amling discovers c/4 diagonal eaters for blocks and blinkers and uses the block eater to construct the first period40 c/4 diagonal ship. David Bell and May13 use these to reduce the p72, p80, and p116 rakes. Matthias Merzenich notices that an incidental reaction in the blinker eater allows a known ship to eat a glider stream and can also be used to complete the first c/4 diagonal ships of periods 28, 32, and 36.


Did you know...

 ... that the clock is almost 5,000 times rarer than the toad, despite both having 6 cells and fitting in a 4 × 4 bounding box?
 ... that the quadpole is more common than the tripole in random soup, due to a relatively common bottleneck reaction involving a century variant hitting a ship?
 ... that a half blockade can be struck by a single glider to produce a threeblock constellation that becomes its mirror image when hit by another glider, while also releasing another glider in the same direction?
 ... that a series of increasingly larger greyships, starting with Canada Grey, can all be constructed incrementally by colliding gliders with a gradually accreting still life target?
 ... that oblique puffers and rakes based on elementary spaceships were unknown in Conway's Life until Dylan Chen and Adam P. Goucher constructed combinations of sprayer knightships in May 2021?
 ... that a configuration of two ponds and two blocks recovers back to its original position when sparked in a certain way, allowing for the creation of some period multipliers?
 ... that the thirdsmallest uniqueperiod gun (at the time) was discovered just six hours after the secondsmallest uniqueperiod gun, despite the two being completely unrelated?
 ... that despite 22P36 having been known since 1995, one half of it was not generalized to a versatile traffic stop catalyst until 26 years later?
 ... that Merzenich's p64 and 32P21 are both hassling two beehives and two Rpentominoes, and 56P27 hassles four of each?
 ... that a 56cell pattern based on the p129 Rpentomino hassler is the smallest known periodic pattern by population that is isotropically endemic to Conway's Life?

Pattern collection

The LifeWiki contains one of the most comprehensive catalogues of patterns available on the internet. Within it you will find:

