Egyptian walk

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Egyptian walk
x = 7, y = 4, rule = B3/S23 ob2o$2obo$3bob2o$3b2obo! #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 7 × 4
Frequency class 35.3
Discovered by Robert Wainwright
Everett Boyer
Year of discovery 1973

Egyptian walk is a 12-cell still life.

Construction

This still life is known to be constructible with 6 gliders.[1] A 6-glider synthesis was found by Chris Cain on March 13, 2015 based on a suggested predecessor from Matthias Merzenich.[2] Some known syntheses can be found in Mark Niemiec's database.[3]

x = 43, y = 30, rule = B3/S23 10bo$11bo13bo$9b3o14bo$24b3o6$11b3o$13bo9b3o10bob2o$12bo12bo10b2obo$7b 2o15bo14bob2o$6bobo30b2obo$8bo13$3o$2bo$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THEME Book ZOOM 10 AUTOSTART GPS 6 T 0 PAUSE 3 T 8 PAUSE 1 T 65 PAUSE 1 T 70 PAUSE 2 LOOP 71 ]]
A 6G synthesis[2][1]
(click above to open LifeViewer)
x = 37, y = 30, rule = B3/S23 12bo$13b2o$12b2o$20bo$19bo$19b3o3$24bo$24bobo$12bo11b2o$13b2o$12b2o$ 30bob2o$30b2obo$33bob2o$33b2obo2$10b2o$b2o6bobo$obo8bo$2bo3$5b3o$7bo$ 6bo$13b2o$12b2o$14bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THEME Book ZOOM 10 AUTOSTART GPS 6 T 0 PAUSE 3 T 14 PAUSE 1 T 25 PAUSE 2 LOOP 26 ]]
A 8G synthesis[3]
(click above to open LifeViewer)

Occurrence

Among the 121 still lifes with 12 cells, this is the 114th most common (i.e. 8th rarest) still life according to Catagolue.

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

See also

References

  1. 1.0 1.1 xs12_321f84c at Adam P. Goucher's Catagolue
  2. 2.0 2.1 Chris Cain (March 13, 2015). Re: Soup search results (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: 12/12-117.rle)

External links