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Soon after, [[Matthias Merzenich]] discovered that a component from the side of [[186P7H2V0]] can attach to a weekender.<ref name="post114802" /> On March 19, {{year|2021}}, Merzenich discovered a width-22 [[symmetric]] tagalong for a single weekender<ref name="post126154" /> and proved that this is the only such period-7 symmetric tagalong at that width.<ref name="post126432" />
Soon after, [[Matthias Merzenich]] discovered that a component from the side of [[186P7H2V0]] can attach to a weekender.<ref name="post114802" /> On March 19, {{year|2021}}, Merzenich discovered a width-22 [[symmetric]] tagalong for a single weekender<ref name="post126154" /> and proved that this is the only such period-7 symmetric tagalong at that width.<ref name="post126432" />
[[Caleb R. Hilton]] found a [[scholar]] with the [[traffic light]] in front removed can act as a [[tagalong]] for a pair of scholars or weekenders. <ref name="post179218" />
{{EmbedViewer
|rle = x = 44, y = 86, rule = B3/S23
29bo12bo$28b3o10b3o$28b3o10b3o$b3o10b3o$o3bo8bo3bo$31bo3b2o3bo$4bo8bo
15bob4o2b4obo$o7b2o7bo11bob4o2b4obo$2b3o2bo2bo2b3o$3b2ob2o2b2ob2o3b3o
5b3o4b6o$32b2o4b2o$32b2o4b2o$5b8o5b3o5b3o$6bob2obo7bo7bo$18bo9bo$16bo
3b2o3b2o3bo$16b2ob3o3b3ob2o$15bobo11bobo$17b2ob2o3b2ob2o$20bo5bo$17b2o
9b2o$18b3o5b3o$17bo11bo$21bo3bo$13b2obo5bobo5bob2o$12bo2b4o3b3o3b4o2b
o$12bo4bo2bob3obo2bo4bo$13b5obo7bob5o$15b3ob2o5b2ob3o$17b2obobobobob2o
2$17b2o3bobo3b2o$17b2o3bobo3b2o$16b2ob3o3b3ob2o$16b2o3bo3bo3b2o$16b2o
11b2o$16b2o2bo5bo2b2o$14bobob2o7b2obobo$19b2o5b2o$16bo3bo5bo3bo$14b2o
b3ob2ob2ob3ob2o$15bo6bobo6bo$22bobo$22bobo$16b6o3b6o$14bo2bobo7bobo2b
o$13b3o3b3o3b3o3b3o$14bo17bo$18bobo5bobo$17b2obobobobob2o$17b2obobobo
bob2o$18bo2bo3bo2bo$17b2o2bo3bo2b2o$16bo4bo3bo4bo$21bo3bo$21bo3bo$20b
o5bo$16bob2o7b2obo$17b4o5b4o$20bo5bo$21bo3bo$20b2o3b2o$17b2o9b2o$22bo
bo$22bobo$19bo2bobo2bo2$15b2o2b2o5b2o2b2o$14bo2b2o2b5o2b2o2bo$15bo3bo
2b3o2bo3bo$15b2o2bo3bo3bo2b2o$15b2o2bo7bo2b2o$15bo2b2o7b2o2bo$16bo13b
o$14bob2o11b2obo$23bo$23bo$16b3o3bobo3b3o$23bo$18b2o3bo3b2o$18b2o7b2o
$18bobo5bobo$17bo11bo$16b4o7b4o$15bo15bo$15b2ob2o7b2ob2o!
|viewerconfig = #C [[ THUMBSIZE 2 HEIGHT 600 WIDTH 600 ]]
|position    = center
|caption      = Scholar as weekender tagalong
|style        = width:300px;
}}


==See also==
==See also==
Line 150: Line 124:
|author = KtT
|author = KtT
|date  = February 9, 2024
|date  = February 9, 2024
}}
<ref name="post179218">{{LinkForumThread
|format = ref
|title  = Re: Spaceship Discussion Thread
|p      = 179218
|author = Caleb R. Hilton
|date  = February 28, 2024
}}</ref>
}}</ref>
</references>
</references>


==External links==
==External links==

Revision as of 05:28, 29 February 2024

Weekender
#N Weekender #O David Eppstein #C An orthogonal period 7 spaceship with speed 2c/7. #C www.conwaylife.com/wiki/Weekender x = 16, y = 11, rule = B3/S23 bo12bo$bo12bo$obo10bobo$bo12bo$bo12bo$2bo3b4o3bo$6b4o$2b4o4b4o2$4bo6bo $5b2o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 7 TRACKLOOP 7 0 -2/7 THUMBSIZE 2 ]]
View animated image
View static image
Pattern type Spaceship
Number of cells 36
Bounding box 18 × 12
Direction Orthogonal
Period 7 (mod: 7)
Speed 2c/7 | 2c/7
Heat 45.1
Kinetic symmetry Unspecified
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 n − 1 tagalongs constituted the only known spaceships with speed 2c/7, besides self-sustaining loops of weekender conduits. These were the only known period-7 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 79-glider synthesis, as well as a p451/p457+ glider-to-weekender converter.[3] On September 6, 2021, iNoMed produced a 33-glider recipe[4] based on 35- and 34-glider recipes from a week earlier. A 32-glider synthesis was found in November 2023.[5] On February 9, 2024, iNoMed reduced the synthesis to 29 gliders,[6][7] followed by a reduction to 28 gliders by KtT the same day.[8][9]

Tagalongs

On April 27, 2000, Stephen Silver found a tagalong for a pair of weekenders, as shown below.

x = 37, y = 24, rule = B3/S23 bo12bo7bo12bo$bo12bo7bo12bo$obo10bobo5bobo10bobo$bo12bo7bo12bo$bo12bo 7bo12bo$2bo3b4o3bo9bo3b4o3bo$6b4o8bo8b4o$2b4o4b4o2b5o2b4o4b4o$15bobobo bo$4bo6bo13bo6bo$5b2o2b2o6bobo6b2o2b2o$14bo2bobo2bo$14bo2bobo2bo$14bob o3bobo3$14b2o5b2o$14b2o5b2o2$16b2ob2o$15bobobobo$15bobobobo$17bobo$15b 2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 ]]
Two weekenders followed by a tagalong
(click above to open LifeViewer)
RLE: here Plaintext: here

On December 6, 2020, John Winston Garth found doo-dah, a small period-21 tagalong for a single weekender, which in its simplest phase consists entirely of two R-pentomino descendants.[10][11] 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 higher-period spaceships and puffers. Garth chose the name "doo-dah" for the tagalong.[12]

Soon after, Matthias Merzenich discovered that a component from the side of 186P7H2V0 can attach to a weekender.[13] On March 19, 2021, Merzenich discovered a width-22 symmetric tagalong for a single weekender[14] and proved that this is the only such period-7 symmetric tagalong at that width.[15]

See also

References

  1. ↑ Jason Summers' jslife pattern collection.
  2. ↑ Martin Grant (January 25, 2015). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  3. ↑ Chris Cain (September 26, 2015). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  4. ↑ 33-glider recipe
  5. ↑ shinjuku (#5443374497) (November 2, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  6. ↑ iNoMed (February 9, 2024). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
  7. ↑ shinjuku (#6136674566) (February 9, 2024). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  8. ↑ KtT (February 9, 2024). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
  9. ↑ shinjuku (#6139137922) (February 9, 2024). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  10. ↑ Jiahao Yu (December 6, 2020). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
  11. ↑ praosylen (December 6, 2020). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
  12. ↑ John Winston Garth (December 6, 2020). Message in #cgol on the Conwaylife Lounge Discord server
  13. ↑ Matthias Merzenich (December 8, 2020). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
  14. ↑ Matthias Merzenich (March 19, 2021). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
  15. ↑ Matthias Merzenich (March 21, 2021). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums


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