Middleweight spaceship

Middleweight spaceship
3bo$bo3bo$o$o4bo$5o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ Y 1.5 TRACKLOOP 4 -1/2 0 THUMBSIZE 2 GPS 4 ]]
View animated image
View static image
Pattern type	Spaceship
Family	XWSS
Number of cells	11
Bounding box	6 × 4
Frequency class	13.2
Direction	Orthogonal
Period	4 (mod: 2)
Speed	c/2 | 2c/4
Heat	15
Kinetic symmetry	n-c
Discovered by	John Conway
Year of discovery	1970
Rules Outer-totalistic rules B3/S23 – B3468/S238 # of rules 24 = 16 Isotropic rules B3aij/S2eik3aijnr – B2n345-a67e8/S1e234-aw5-ijy6-k7e8
Glider synthesis Fewest gliders 3 Catagolue-generated RLE synthesis Uploaded synthesis RLE mwss_synth.rle
Pattern files Plaintext mwss.cells RLE mwss.rle
Identifiers apgcode xq4_27dee6 Pentadecathlon ID 11P4H2V0.1

The middleweight spaceship (commonly abbreviated to MWSS) or (rarely) medium fish is the third most common spaceship after the glider and lightweight spaceship. It was found by John Conway in 1970 and travels at c/2 orthogonally. It can support various non-standard components, such as pushalong 1.

Construction

A three-sided, one-step 3-glider synthesis was recorded on Lifeline Volume 3, involving a glider hitting a pre-pre-block freshly made from a 2-glider collision.

A number of different ways to construct a MWSS can be found in Mark Niemiec's glider synthesis database.

There is a three-object one-glider seed for the middleweight spaceship, shown below; the constellation of three blocks itself can be constructed with four gliders, thus providing a 5-glider synthesis for the MWSS. There are also 14 matches for the middleweight spaceship in the octo3obj database.

x = 14, y = 9, rule = B3/S23 obo$b2o$bo3$4bo$4b2o5b3o$3bobo5bo$12bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book AUTOSTART GPS 8 ZOOM 14 T 0 PAUSE 1 T 31 PAUSE 1 LOOP 32 ]] 3G synthesis for the MWSS (click above to open LifeViewer)

x = 9, y = 9, rule = B3/S23 bo5b2o$2bo4b2o$3o4$7b2o$b2o4b2o$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book AUTOSTART GPS 8 ZOOM 14 T 0 PAUSE 1 T 47 PAUSE 1 LOOP 48 ]] A 3-block 1G seed for the MWSS (click above to open LifeViewer)

Occurrence

See also: List of natural spaceships

The MWSS occurred about one fourth as commonly as the LWSS in soups investigated by Achim Flammenkamp. It is also the twenty-third most common object on Adam P. Goucher's Catagolue.

There are 167 results in the octohash database, 1798 results in the octo3obj database, and 182 results in the octo3g database with at least one escaping MWSS.

See also

• Lightweight spaceship, Heavyweight spaceship
• LWSS on MWSS 1, MWSS on MWSS 1, MWSS on HWSS 1
• Coe ship
• Middleweight emulator
• Middleweight volcano
• Fake xWSS

External links

• MWSS at the Life Lexicon
• Middleweight spaceship at Adam P. Goucher's Catagolue
• 11P4H2V0.1 at Heinrich Koenig's Game of Life Object Catalogs