Carrier siamese shillelagh

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Carrier siamese shillelagh
x = 8, y = 3, rule = B3/S23 2o4b2o$o2b2o2bo$b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]]
Pattern type Strict still life
Number of cells 12
Bounding box 3 × 8
Frequency class 30.2
Static symmetry Unspecified
Discovered by Robert Wainwright
Everett Boyer
Year of discovery 1973

Carrier siamese shillelagh is a 12-cell still life.

Construction

Carrier siamese shillelagh is known to be constructible with 5 gliders.[1] A 6-glider synthesis of this still life was found in January 2020.[2] Some known alternate syntheses can be found in Mark Niemiec's database.[3]

x = 62, y = 54, rule = B3/S23 60bo$59bo$59b3o4$38bo$37bo$37b3o11$16b2o19bo$17bo18bo$15bo20b3o$15b2o$16bo$15bo17b2o$15bobo14bobo$16b2o16bo25$3o$2bo$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THEME Book ZOOM 8 X 0 Y -4 AUTOSTART GPS 12 T 0 PAUSE 3 T 112 PAUSE 1 T 119 PAUSE 1 T 121 PAUSE 2 LOOP 122 ]]
A 5G synthesis[1]
(click above to open LifeViewer)
x = 73, y = 41, rule = B3/S23 b2o$2bo31bobo$o33b2o$2o33bo$bo$o$obo$b2o35bo$38bobo$38b2o2$41bo$40bo$24bo15b3o$24bobo$24b2o4$28b3o$28bo$29bo17$70b2o$70bobo$70bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 450 THEME Book ZOOM 8 X -8 Y -8 AUTOSTART GPS 12 T 0 PAUSE 3 T 122 PAUSE 1 T 158 PAUSE 2 LOOP 159 ]]
A 6G synthesis[2]
(click above to open LifeViewer)
x = 40, y = 41, rule = B3/S23 21bo$21bobo$21b2o$12b2o$13b2o$12bo$22bo$21b2o$21bobo$33bo$32bo$32b3o6$b2o$2bo$o$2o$bo$o$obo$b2o4$37b3o$37bo$38bo6$13bo$13b2o$12bobo22b3o$37bo$38bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THEME Book ZOOM 8 X 0 Y 0 AUTOSTART GPS 12 T 0 PAUSE 3 T 7 PAUSE 1 T 56 PAUSE 2 LOOP 57 ]]
A 7G synthesis[3]
(click above to open LifeViewer)

Occurrence

Among the still lifes with 12 cells, this is the 68th most common still life according to Catagolue.

There are no occurrences of this still life in final patterns of collisions in octohash, octo3obj or octo3g databases.

References

  1. 1.0 1.1 xs12_3pcz643 at Adam P. Goucher's Catagolue
  2. 2.0 2.1 Ian07 (January 18, 2020). Re: Randomly enumerating glider syntheses (discussion thread) at the ConwayLife.com forums
  3. 3.0 3.1 The 121 twelve-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 12/12-80.rle)

External links