Boat with hooked nine

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Boat with hooked nine
x = 7, y = 5, rule = B3/S23 2b2o$bo2bo$obobo$b2obobo$5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 48 ]]
Pattern type Strict still life
Number of cells 13
Bounding box 7 × 5
Frequency class 22.7
Static symmetry Unspecified
Discovered by Unknown
Year of discovery Unknown

Boat with hooked nine is a 13-cell still life.

This still life is named in analogy to boat with hooked tail; an alternate name, 13-boat wrap eater, is also used, but discouraged.

Construction

This still life can be constructed with 4 gliders.[1] Several known alternate syntheses can be found in Mark Niemiec's database.[2] A 4-glider synthesis was found in July 2017.[3]

x = 37, y = 27, rule = B3/S23 29bo$28bo$28b3o4$2bobo$3b2o$3bo4$32b2o$31bo2bo$30bobobo$31b2obobo$35b 2o6$16b2o$16bobo$bo14bo$b2o$obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 400 THEME Book ZOOM 10 AUTOSTART GPS 12 T 0 PAUSE 1 T 20 PAUSE 3 T 66 PAUSE 2 LOOP 67 ]]
A 4G synthesis[3][4]
(click above to open LifeViewer)
x = 35, y = 20, rule = B3/S23 16bo7bo$obo12bo8bobo$b2o12b3o6b2o$bo4$30b2o$29bo2bo$28bobobo$29b2obobo $33b2o6$15b2o4b2o$15bobo3bobo$15bo5bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 10 AUTOSTART GPS 12 T 0 PAUSE 1 T 20 PAUSE 3 T 32 PAUSE 2 LOOP 33 ]]
A 5G synthesis[2]
(click above to open LifeViewer)

Occurrence

See also: List of common still lifes, List of still lifes with 13 cells

It is the 113th most common still life on Adam P. Goucher's Catagolue, being less common than trans-mango with tail but more common than bi-loaf 2. It is the 7th most common still life with 13 cells, being less common than tapeworm but more common than crinkly heptomino with hooked tail.

There is a three-glider collision with this still life in the ash.[5]

See also

References

  1. xs13_31egma4 at Adam P. Goucher's Catagolue
  2. 2.0 2.1 The 240 thirteen-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 13/13-185.rle)
  3. 3.0 3.1 Simon Ekström (July 29, 2017). Re: 4 glider syntheses (discussion thread) at the ConwayLife.com forums
  4. xs13_31egma4 (archived copy)
  5. The final population is 376 with 12 escaping gliders. The headerless RLE of the collision is 68bo$66b2o$67b2o$63bo$64bo$62b3o41$bo$b2o$obo!

External links