Swan

Swan
x = 24, y = 12, rule = B3/S23 bo10b2o$5o6b2o$o2b2o8bo7b2o$2b2obo5b2o6b3obo$11b2o3bob2o$5bobo6b2o$10b 3obo4bo$7b3o3bo4bo$8bo7bo$8bo6bo2$11bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 ZOOM 16 TRACKLOOP 4 -1/4 -1/4 ]]
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Pattern type	Spaceship
Number of cells	49
Bounding box	24 × 12
Direction	Diagonal
Period	4 (mod: 4)
Speed	c/4 | c/4
Heat	51.0
Kinetic symmetry	Unspecified
Discovered by	Tim Coe
Year of discovery	1996
Rules Outer-totalistic rules B3/S23 – B378/S23 # of rules 22 = 4 Isotropic rules B3/S23-y – B34eq5ce6-ak78/S234cey5cekry6ein7e
Pattern files Plaintext swan.cells RLE swan.rle
Identifiers apgcode xq4_bh1cgzw1020msze28aehnfzxopp1zw62 Pentadecathlon ID 49P4H1V1.1

Swan is a c/4 diagonal spaceship producing some useful sparks. It was found by Tim Coe in February 1996. On February 20, 1996 Noam Elkies noticed that it could be made into a small boatstretcher. It can also be combined non-trivially with a Canada goose. In November 2000 Jason Summers found a period-8 glide-reflective tagalong for two swans. This was the first c/4 diagonal spaceship with a period other than period-4 to be found.

A version stretching a tub (instead of a boat as shown below) was called TIRETRAK.LIF in Alan Hensel's lifep pattern collection from the 1990s; this was at a time when PC-compatible computers running older versions of MS-DOS were still limited to eight-character filenames.

Gallery

x = 28, y = 28, rule = B3/S23 5b2obo7b3o$5bo3bo6bo$5bo4bo7bo7b2o$7b2o7bobo4b2obo$9bobo4b3obo2b2o$3o 12bo3b2o2b2o$o10b2ob4ob2o$3bo8b7o$o2bo$bo2bo$2bo$4bobo$6b2o$7bo6b3o$6b 2o6bo2bo$5b3o5bo3bo$2ob2ob2o7bo$o3bob2o9b2o$ob3o2bo5bo6bo$5b2o8b3o3bo$ 4b3o14bo$19bo$20bo$3b3o$3b3o2$2b2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 2 ZOOM 9 TRACKLOOP 8 -1/4 -1/4 ]] Two swans pulling a period 8 tagalong (click above to open LifeViewer) RLE: here Plaintext: here

x = 24, y = 15, rule = b3/s23 12b2o10b$3o9bobo9b$o2b3o6bo9bob$bobo16b2obo$6bo4b2o2bo3b2o2bo$4bo6b2o 2bob2o2bo2b$6bob2obo3b5o4b$15b2o7b$7bo2b6o8b$8b7o9b$10b3o11b2$13bo10b$ 12bobo9b$13b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 2 ZOOM 9 TRACKLOOP 32 -1/4 -1/4 ]] A swan stretching a boat (click above to open LifeViewer) RLE: here Plaintext: here

See also

• Boatstretcher 1
• Enterprise
• Glider
• Orion

External links

• Swan at the Life Lexicon

• Swan at Adam P. Goucher's Catagolue

• 49P4H1V1.1 at Heinrich Koenig's Game of Life Object Catalogs