Weekender
Weekender  
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Pattern type  Spaceship  

Number of cells  36  
Bounding box  18 × 12  
Direction  Orthogonal  
Period  7  
Mod  7  
Speed  2c/7  
Speed (unsimplified)  2c/7  
Heat  45.1  
Discovered by  David Eppstein  
Year of discovery  2000  
 
 
 

Weekender is a 2c/7 orthogonal spaceship that was found by David Eppstein on January 12, 2000.^{[1]} Before the discovery of scholar in 2019, n weekenders pulling n1 tagalongs constituted the only known spaceships with speed 2c/7, besides selfsustaining loops of weekender conduits. These were the only known period7 spaceships until the discovery of lobster in 2011, loafer in 2013 and spaghetti monster in 2016.
Despite the relative simplicity of its components, a glider synthesis for the weekender had been elusive since its discovery. A weekender synthesis was completed on January 25, 2015, 15 years after its discovery (and coincidentally, on a weekend).^{[2]} On September 26, 2015, Chris Cain announced a p444 weekender gun based on a 79glider synthesis, as well as a p451/p457+ glidertoweekender converter.^{[3]} On September 6, 2021, iNoMed produced a 33glider recipe^{[4]} based on 35 and 34glider recipes from a week earlier.
Tagalongs
On April 27, 2000, Stephen Silver found a tagalong for a pair of weekenders, as shown below.
Two weekenders followed by a tagalong (click above to open LifeViewer) RLE: here Plaintext: here 
On December 6, 2020, John Winston Garth found doodah, a small period21 tagalong for a single weekender, which in its simplest phase consists entirely of two Rpentomino descendants.^{[5]}^{[6]} The spaceship was found using a combination of ikpx2 and apgsearch, with partial results from the former being inputted into the latter via ikpx2's "standard input" feature, with the goal of searching higherperiod spaceships and puffers. Garth chose the name "doodah" for the tagalong.^{[7]}
Soon after, Matthias Merzenich discovered that a component from the side of 186P7H2V0 can attach to a weekender.^{[8]} On March 19, 2021, Merzenich discovered a width22 symmetric tagalong for a single weekender^{[9]} and proved that this is the only such period7 symmetric tagalong at that width.^{[10]}
See also
References
 ↑ Jason Summers' jslife pattern collection.
 ↑ Martin Grant (January 25, 2015). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
 ↑ Chris Cain (September 26, 2015). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
 ↑ 33glider recipe
 ↑ Jiahao Yu (December 6, 2020). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
 ↑ praosylen (December 6, 2020). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
 ↑ John Winston Garth (December 6, 2020). Message in #cgol on the Conwaylife Lounge Discord server
 ↑ Matthias Merzenich (December 8, 2020). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
 ↑ Matthias Merzenich (March 19, 2021). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
 ↑ Matthias Merzenich (March 21, 2021). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
External links
 Searching for Spaceships  Eppstein's paper describing the discovery of the weekender
 Weekender at the Life Lexicon
 Life (B3/S23) at David Eppstein's Glider Database
 Weekender at Adam P. Goucher's Catagolue
 36P7H2V0.1 at Heinrich Koenig's Game of Life Object Catalogs
 Patterns
 Spaceships with 36 cells
 Periodic objects with minimum population 36
 Patterns with 36 cells
 Patterns found by David Eppstein
 Patterns found in 2000
 Patterns that can be constructed with 33 gliders
 Spaceships
 Spaceships with period 7
 Orthogonal spaceships
 Spaceships with speed 2c/7
 Spaceships with unsimplified speed 2c/7
 Spaceships with heat 45
 Spaceships with mod 7
 Nonmonotonic spaceships
 Patterns with bilateral orthogonal symmetry