Snorkel loop: Difference between revisions

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{{Stilllife|name=Snorkel loop|pname=snorkelloop|bx=6|by=5|c=12|life105=true|life106=true|plaintext=true|rle=true|synthesis=6}}
{{Stilllife
'''Snorkel loop''' (or '''12-loop''' or '''twelve loop''') is the 83rd most common [[still life]], being less common than [[beehive and table]] but more common than [[trans-barge with tail]].<ref>{{cite web|url=http://wwwhomes.uni-bielefeld.de/achim/freq_top_life.html |title=Most seen natural occurring ash objects in Game of Life |author=Achim Flammenkamp |date=September 7, 2004 |accessdate=January 15, 2009}}</ref>
|name             = Snorkel loop
|pname           = snorkelloop
|c                = 12
|bx               = 6
|by               = 5
|fc              = 21.3
|symmetry        = n
|discoverer      = Robert Wainwright
|discoverer2      = Everett Boyer
|discoveryear    = 1973
|rulemin          = B/S23
|rulemax          = B3678/S012345678
|rulespecial      = [[Conway's Game of Life|Conway Life]], [[HighLife]]
|isorulemin      = B/S2-in3nr
|isorulemax      = B2in34-aijk5-kqr678/S012345678
|synthesis        = 4
|synthesisRLE    = true
|plaintext       = true
|rle             = true
|apgcode          = xs12_2egm93
|niemiecid        = 12.113
|pentadecathlonid = 12.34
|viewerconfig    = [[ ZOOM 48 ]]
}}{{Distinguish|Twelve loop}}
'''Snorkel loop''' is a {{slcells|12|text=12-cell}} [[still life]].
It can be interpreted as a [[claw]] with an attached [[hooked tail]].


==See also==
== Glider synthesis ==
*[[Eleven loop]]
A snorkel loop can be [[Glider synthesis|constructed]] with four gliders; known alternate syntheses are available in [[Mark Niemiec's database]].<ref name="niemiec" />
*[[Loop]]
*[[List of common still lifes]]


==References==
{{EmbedViewer
<references />
|rle          = x = 35, y = 16, rule = B3/S23
bo$2bo$3o3$4bobo$5b2o$5bo2$33b2o$29b2obobo$22bo7bobo$20b2o8bo2bo$13bo
7b2o8b2o$14b2o$13b2o!
|viewerconfig = #C [[ THEME Book ZOOM 12 X 4 Y 2 AUTOSTART GPS 12 T 0 PAUSE 3 T 48 PAUSE 2 LOOP 49 ]]
|position    = center
|caption      = A 4G synthesis
|style        = width:360px;
}}


==External links==
== Commonness ==
*[http://home.interserv.com/~mniemiec/still12.htm Life Twelve-Bit Still-Lifes] by [[Mark Niemiec]]
Snorkel loop is the eighty-third [[List of common still lifes|most common still life]] in [[Achim Flammenkamp's census]], being less common than [[beehive on table]] but more common than [[trans-barge with tail]].<ref>{{citeAchim|accessdate=January 15, 2009}}</ref>
 
It is the 83rd [[List of common still lifes|most common still life]] on [[Adam P. Goucher]]'s [[Catagolue]], being less common than [[boat tie eater tail]] but more common than [[beehive on table]]. It is the 9th most common still life with 12 cells, being less common than [[boat tie eater tail]] but more common than [[beehive on table]].<ref>{{citeCatagolueStats|May 4, 2023}}</ref>
 
There are two collisions in the [[octo3obj database]] with a snorkel loop in the ash.{{refn|Headerless RLEs of the collisions are {{headerlessRLE|3b2o3b2o$3b2o3b2o2$8b2o$4b2o2b2o$4b2o2$2o6b2o$2o2b2ob2o$4b2o3bo!}} and {{headerlessRLE|4b2ob2o$4b2ob2o$2o$2o3$b2o$b2o2b2ob2o$5b2ob2o$bo$2o$obo!}}}}
 
{{EmbedViewer
|rle          = x = 31, y = 42, rule = LifeSuper
3.D$.3D$D$D.2D$.D2.D$3.2D29$29.2A$29.2A4$10.A$10.2A$9.2A!
|position    = center
|viewerconfig = #C [[ GPS 60 THUMBSIZE 2 ]]
|caption      = The combination of an [[R-pentomino]] and a [[block]] in these positions creates a lot of ash including a snorkel loop.
}}
 
== See also ==
* [[Loop#Loop family]]
 
== References ==
<references>
 
<ref name="niemiec">{{LinkNiemiec|p1-12.htm|The 121 twelve-bit still-lifes|rle=12/12-113.rle|nobullet=nobullet}}</ref>
 
</references>
 
== External links ==
* {{LinkCatagolue|xs12_2egm93}}
* {{LinkPentadecathlonObject|12.34}}
 
__NOTOC__

Latest revision as of 15:43, 3 August 2025

Snorkel loop
x = 6, y = 5, rule = B3/S23 2b2o$bo2bo$2bobo$obob2o$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] [[ ZOOM 48 ]]
View static image
Pattern type Strict still life
Number of cells 12
Bounding box 6 × 5
Frequency class 21.3
Static symmetry n (C1)
Discovered by Robert Wainwright
Everett Boyer
Year of discovery 1973
Not to be confused with Twelve loop.

Snorkel loop is a 12-cell still life. It can be interpreted as a claw with an attached hooked tail.

Glider synthesis

A snorkel loop can be constructed with four gliders; known alternate syntheses are available in Mark Niemiec's database.[1]

x = 35, y = 16, rule = B3/S23 bo$2bo$3o3$4bobo$5b2o$5bo2$33b2o$29b2obobo$22bo7bobo$20b2o8bo2bo$13bo 7b2o8b2o$14b2o$13b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THEME Book ZOOM 12 X 4 Y 2 AUTOSTART GPS 12 T 0 PAUSE 3 T 48 PAUSE 2 LOOP 49 ]]
A 4G synthesis
(click above to open LifeViewer)

Commonness

Snorkel loop is the eighty-third most common still life in Achim Flammenkamp's census, being less common than beehive on table but more common than trans-barge with tail.[2]

It is the 83rd most common still life on Adam P. Goucher's Catagolue, being less common than boat tie eater tail but more common than beehive on table. It is the 9th most common still life with 12 cells, being less common than boat tie eater tail but more common than beehive on table.[3]

There are two collisions in the octo3obj database with a snorkel loop in the ash.[4]

x = 31, y = 42, rule = LifeSuper 3.D$.3D$D$D.2D$.D2.D$3.2D29$29.2A$29.2A4$10.A$10.2A$9.2A! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 60 THUMBSIZE 2 ]]
The combination of an R-pentomino and a block in these positions creates a lot of ash including a snorkel loop.
(click above to open LifeViewer)

See also

References

  1. ↑ The 121 twelve-bit still-lifes at Mark D. Niemiec's Life Page (download pattern file: 12/12-113.rle)
  2. ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  3. ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on May 4, 2023.
  4. ↑ Headerless RLEs of the collisions are 3b2o3b2o$3b2o3b2o2$8b2o$4b2o2b2o$4b2o2$2o6b2o$2o2b2ob2o$4b2o3bo! and 4b2ob2o$4b2ob2o$2o$2o3$b2o$b2o2b2ob2o$5b2ob2o$bo$2o$obo!


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