Weekender is a 2c/7 orthogonal spaceship that was found by David Eppstein on January 12, 2000. 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). 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.
On April 27, 2000, Stephen Silver found a tagalong for a pair of weekenders, as shown below.
Two weekenders followed by a tagalongRLE: 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. 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 settled on the name "doo-dah" for the tagalong.
Soon after, Matthias Merzenich discovered that a component from the side of 186P7H2V0 can attach to a weekender.
- 36P7H2V0.1 at Heinrich Koenig's Game of Life Object Catalogs