2-engine Cordership
2-engine Cordership | |||||||||||
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Pattern type | Spaceship | ||||||||||
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Family | Cordership | ||||||||||
Number of cells | 100 | ||||||||||
Bounding box | 41×48 | ||||||||||
Direction | Diagonal | ||||||||||
Period | 96 | ||||||||||
Mod | 96 | ||||||||||
Speed | c/12 | ||||||||||
Speed (unsimplified) | 8c/96 | ||||||||||
Heat | 110.4 | ||||||||||
Discovered by | Aidan F. Pierce | ||||||||||
Year of discovery | 2017 | ||||||||||
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The 2-engine Cordership is a c/12 diagonal spaceship that was discovered by Aidan F. Pierce on December 31, 2017.[1] It is the Cordership that uses the fewest number of switch engines known to be possible (ahead of the 3-engine Cordership) as well as the smallest Cordership in terms of population (ahead of a variant of the 4-engine Cordership) and the smallest engineered spaceship.
The 2-engine Cordership was voted the Pattern of the Year 2017 on ConwayLife.com.[2]
Reactions
Dave Greene noted that the 2-engine Cordership, like its 3-engine counterpart, can be stopped by a single glider from behind without releasing any gliders or other spaceships,[3] and updated Martin Grant's Model D Heisenburp device for the 2-engine Cordership.[3]
Dave Greene, Blinkerspawn and Matthias Merzenich noted that the 2-engine Cordership can be eaten by a constellation of two eaters and three blocks:[3]
2-engine Cordership eater (click above to open LifeViewer) RLE: here Plaintext: here |
gmc_nxtman pointed out that the 2-engine Cordership can reflect a glider 180 degrees, while preserving its mod-4 timing, resulting in an updated version of glider loop.[4]
Synthesis and seeds
Dave Greene found a 13-glider synthesis of the 2-engine Cordership on the day of its discovery,[5] which Luka Okanishi improved to 9 gliders.[6]
Two-glider seeds using as few as 9 still lifes and one-glider seeds using 15 still lifes are known.[7][8]
Slow salvo construction of a one-glider seed (click above to open LifeViewer) RLE: here Plaintext: here |
Uses
David Bell built a log(t) growth from four 2-engine Corderships,[9] and a 4-engine Cordership rake from two adjacent 2-engine Corderships,[10] both on January 3rd, 2018. 2718281828, Dave Greene and Chris Cain posted glider syntheses for this rake on January 7th, allowing for the construction of breeders.[11][12][13]
Bell further built two different period 96 c/12 forward rakes, one using the the 4-engine rake, along with the 2-engine Cordership and an older 3-engine block puffer,[14] the other using a new Cordership boat and block puffer, two 2-engine Corderships, and a sideways rake, both on January 6th, 2018.[14] He also built a different Cordership made from a two-engine boat puffer and a 2-engine Cordership that contains a glider which can escape if the boat is deleted by a sideways or forward glider.[14]
Chris Cain updated the infinite glider hotel to use the 2-engine Cordership on January 3rd, 2018.[15]
'Entity Valkyrie' built an 714×501 2-engine Cordership gun on January 6, 2018, using Luka Okanishi's 9-glider synthesis;[16] BlinkerSpawn noted that this gun could be compacted to 385×253 using the quadri-Snark.[17] Dave Greene built an unrelated period-556 2-engine Cordership gun on January 7th, 2018.[18][19] 'Entity Valkyrie' built a different gun using a boat keeper reaction on January 10, 2018.[20]
Aidan F. Pierce combined the 2-engine Cordership with an additional switch engine to obtain various puffers.[21]
Toward the end of 2018, Adam P. Goucher added a "0-degree" slow-salvo synthesis of a 2-engine Cordership to slmake, to allow more efficient long elbow pushes to be automatically compiled in self-constructing spaceship recipes.[22]
References
- ↑ Aidan F. Pierce (December 31, 2017). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (February 19, 2018). Re: Pattern of the Year 2017 -- votes (discussion thread) at the ConwayLife.com forums
- ↑ 3.0 3.1 3.2 Dave Greene (January 3, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ gmc_nxtman (January 3, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (December 31, 2017). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Luka Okanishi (AbhpzTa) (December 31, 2017). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (January 1, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (March 10, 2018). Re: Thread For Synthesisable Spaceship Guns (discussion thread) at the ConwayLife.com forums
- ↑ David Bell (January 3, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ David Bell (January 3, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ 2718281828 (January 7, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (January 7, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Chris Cain (January 7, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ 14.0 14.1 14.2 David Bell (January 6, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Chris Cain (January 3, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Entity Valkyrie (January 6, 2018). Guns Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ BlinkerSpawn (January 6, 2018). Re: Guns Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (January 7, 2018). Re: Guns Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (January 7, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Entity Valkyrie (January 10, 2018). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ Aidan F. Pierce (January 7, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Adam P. Goucher (September 23, 2018). Re: Slow-salvo recipes (discussion thread) at the ConwayLife.com forums
External links
- 2-engine Cordership at the Life Lexicon
- 2-engine Cordership at Adam P. Goucher's Catagolue (extended)
- Patterns
- Patterns with 100 cells
- Patterns found by Aidan F. Pierce
- Patterns found in 2017
- Patterns that can be constructed with 9 gliders
- Outer-totalistically endemic patterns
- Isotropically endemic patterns
- Spaceships
- Periodic objects with minimum population 100
- Spaceships with period 96
- Diagonal spaceships
- Spaceships with speed c/12
- Spaceships with unsimplified speed 8c/96
- Spaceships with heat 110
- Cordership variants
- Spaceships with mod 96
- Engineered spaceships
- Non-monotonic spaceships