Cloverleaf interchange: Difference between revisions

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|bx          = 13
|bx          = 13
|by          = 13
|by          = 13
|symmetry    = *c
|discoverer  = Adam P. Goucher
|discoverer  = Adam P. Goucher
|discoveryear = 2016
|discoveryear = 2016<!--should we be listing this as the discovery year if it was known beforehand?-->
|rulemin      = B/S23
|rulemin      = B/S23
|rulemax      = B378/S012345678
|rulemax      = B378/S012345678
|rulespecial  = [[Conway's Game of Life|Conway Life]]
|rulespecial  = [[Conway's Game of Life|Conway Life]]
|synthesis    = 12
|isorulemin  = B/S2cik
|isorulemax  = B2ikn34-inw5-ry6-i78/S012345678
|synthesis    = 9
|plaintext    = true
|rle          = true
|rle          = true
|viewerconfig = #C [[ THUMBSIZE 2 HEIGHT 480 ]]
|viewerconfig = #C [[ THUMBSIZE 2 HEIGHT 480 ]]
|apgcode      = xs56_g8861u0u1688gz8ll55o0o55ll8zx3430343
}}
}}
:''For other uses of "cloverleaf", see [[Cloverleaf (disambiguation)]].''
{{for|other uses of cloverleaf|Cloverleaf (disambiguation)}}


'''Cloverleaf interchange''' (or '''fourfold [[racetrack]]-[[weld]]-racetrack''') is a [[:Category:Strict still lifes with 56 cells|56]]-cell [[still life]] exhibiting D8_1 [[symmetry]].  
'''Cloverleaf interchange''' (or '''fourfold [[racetrack]]-[[weld]]-racetrack''') is a {{slcells|56|text=56-cell}} [[still life]] exhibiting D8_1 [[symmetry]].  


A natural occurrence was found in the [[ash]] of a random [[soup]] by [[:Category:Patterns found by Adam P. Goucher|Adam P. Goucher]] on August 12, [[:Category:Patterns found in 2016|2016]].<ref name="calcymanhaul" /> This makes it the largest known still life to occur completely naturally, surpassing the previous record holder, the 46-cell [[professor]]; it had previously arisen semi-naturally in various higher symmetries, including C2_1, C4_1, D2_+1, D4_+1, D4_+2 and D4_x1.  
While known for many years beforehand due to its ability to be [[hassle]]d, it is notable due to a natural occurrence being found in the [[ash]] of a random [[asymmetric]] [[soup]] by [[Adam P. Goucher]] on August 12, {{year|2016}}.<ref name="haul10a1c7a48df686717596631e275383a5" /><ref name="post34242" /> This made it the single largest known still life to occur completely [[natural]]ly, surpassing the previous record holder, the 46-cell [[professor]]; it had previously arisen semi-naturally in various higher symmetries, including C2_1, C4_1, D2_+1, D4_+1, D4_+2 and D4_x1. It has since been tied in C1 by another, unnamed 56-cell still life found by [[John Goodman]] in September {{year|2021}}.<ref name="post135613" />


'BlinkerSpawn' found a 12-[[glider]] [[glider synthesis|synthesis]] on the same day.<ref name="12synthesis" />
[[BlinkerSpawn]] found a {{gliders|12}} [[Glider synthesis|synthesis]] on August 12, 2016.<ref name="post34243" /> [[GUYTU6J]] improved this to {{gliders|10|text=10 gliders}} on February 5, 2020.<ref name="post88936" /> [[KtT]] further reduced the cost to {{gliders|9|text=9 gliders}} on September 23, 2024.<ref name="post194679" />


==References==
A cloverleaf interchange can be hassled by [[carnival shuttle]]s:
 
{{EmbedViewer
|pname        = p12cloverleafhassler
|viewerconfig = #C [[ AUTOSTART THUMBSIZE 2 ZOOM 8 WIDTH 600 HEIGHT 600 GPS 6 LOOP 12 ]]
|position    = center
|apgcode      = xp12_y65981aowuk0ggxgg0kuwoa1895zya13x24045054042x31zbg1m0gyb2q202q2ybg0m1gbz08o9p1hyah9h0h9hyah1p9o8zy0680dxe044ew4aa9870789aa4we440exd086zwg0m1gbx70227w255p1u0u1p552w72207xbg1m0gz0h1p9o8ya8p808p8ya8o9p1hzd086yd4540454yd680dzya8swgk2gia0aig2kgws8zy6a91851w72y527w15819a
}}
 
== References ==
<references>
<references>
<ref name="calcymanhaul">{{cite web
<ref name="haul10a1c7a48df686717596631e275383a5">{{citeCatagolue
|url        = https://catagolue.appspot.com/haul/b3s23/C1/10a1c7a48df686717596631e275383a5
|page      = haul/b3s23/C1/10a1c7a48df686717596631e275383a5
|title      = Haul
|title      = Haul
|author    = Adam P. Goucher
|author    = Adam P. Goucher
Line 33: Line 47:
|accessdate = August 12, 2016
|accessdate = August 12, 2016
}}</ref>
}}</ref>
<ref name="12synthesis">{{cite web
<ref name="post34242">{{LinkForumThread
|url        = http://conwaylife.com/forums/viewtopic.php?f=2&t=1452&p=34254#p34243
|format = ref
|title  = Re: Soup search results
|p      = 34242
|author = Apple Bottom
|date  = August 12, 2016
}}</ref>
<ref name="post135613">{{LinkForumThread
|format = ref
|title  = Re: Soup search results
|p      = 135613
|author = dani
|date  = September 8, 2021
}}</ref>
<ref name="post34243">{{LinkForumThread
|format    = ref
|title      = Re: Soup search results
|f         = 2  
|t         = 1452  
|p         = 34243
|author    = BlinkerSpawn
|author    = BlinkerSpawn
|title      = Re: Soup search results
|work      = ConwayLife.com forums
|date      = August 12, 2016
|date      = August 12, 2016
|accessdate = August 12, 2016
}}</ref>
<ref name="post88936">{{LinkForumThread
|format = ref
|title  = Re: Thread for your unsure discoveries
|p      = 88936
|author = GUYTU6J
|date  = February 5, 2020
}}</ref>
<ref name="post194679">{{LinkForumThread
|format = ref
|title  = Re: Still Life Synthesis Thread
|f      = 2
|t      = 3267
|p      = 194679
|author = KtT
|date  = September 23, 2024
}}</ref>
}}</ref>
</references>
</references>


==External links==
== External links ==
{{LinkCatagolue|xs56_g8861u0u1688gz8ll55o0o55ll8zx3430343}}
* {{LinkWikipedia|Cloverleaf_interchange}}
{{LinkWikipedia|Cloverleaf_interchange|name=Cloverleaf interchange}}
* {{LinkCatagolue|xs56_g8861u0u1688gz8ll55o0o55ll8zx3430343}}


{{Symmetry|full}}
{{natural}}

Latest revision as of 18:59, 26 September 2024

Cloverleaf interchange
x = 13, y = 13, rule = B3/S23 4bo3bo4b$3bobobobo3b$3bobobobo3b$b2o2bobo2b2ob$o4bobo4bo$b4o3b4ob$13b$ b4o3b4ob$o4bobo4bo$b2o2bobo2b2ob$3bobobobo3b$3bobobobo3b$4bo3bo4b! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 3 ZOOM 21 HEIGHT 400 SUPPRESS ]] #C [[ THUMBSIZE 2 HEIGHT 480 ]]
View static image
Pattern type Strict still life
Number of cells 56
Bounding box 13 × 13
Static symmetry *c (D8_1)
Discovered by Adam P. Goucher
Year of discovery 2016
For other uses of cloverleaf, see Cloverleaf (disambiguation).

Cloverleaf interchange (or fourfold racetrack-weld-racetrack) is a 56-cell still life exhibiting D8_1 symmetry.

While known for many years beforehand due to its ability to be hassled, it is notable due to a natural occurrence being found in the ash of a random asymmetric soup by Adam P. Goucher on August 12, 2016.[1][2] This made it the single largest known still life to occur completely naturally, surpassing the previous record holder, the 46-cell professor; it had previously arisen semi-naturally in various higher symmetries, including C2_1, C4_1, D2_+1, D4_+1, D4_+2 and D4_x1. It has since been tied in C1 by another, unnamed 56-cell still life found by John Goodman in September 2021.[3]

BlinkerSpawn found a 12-glider synthesis on August 12, 2016.[4] GUYTU6J improved this to 10 gliders on February 5, 2020.[5] KtT further reduced the cost to 9 gliders on September 23, 2024.[6]

A cloverleaf interchange can be hassled by carnival shuttles:

x = 49, y = 49, rule = B3/S23 10b2obo21bob2o$14bo3bo11bo3bo$10bo7b2o9b2o7bo$11b2ob2o2bo11bo2b2ob2o$ 15bo2b2ob2o3b2ob2o2bo$14b2o7bobo7b2o$15bo3bo9bo3bo$20bob2ob2obo3$obo 43bobo$o2bo17b3ob3o17bo2bo$3bo41bo$o21bo3bo21bo$bobobo16bo3bo16bobobo$ 3b4o14b3ob3o14b4o3$b4o17bo3bo17b4o$2bobobo14bobobobo14bobobo$7bo13bobo bobo13bo$4bo6bo3bo3b2o2bobo2b2o3bo3bo6bo$4bo2bo3bob3o2bo4bobo4bo2b3obo 3bo2bo$5bobo3bo3bo3b4o3b4o3bo3bo3bobo2$5bobo3bo3bo3b4o3b4o3bo3bo3bobo$ 4bo2bo3bob3o2bo4bobo4bo2b3obo3bo2bo$4bo6bo3bo3b2o2bobo2b2o3bo3bo6bo$7b o13bobobobo13bo$2bobobo14bobobobo14bobobo$b4o17bo3bo17b4o3$3b4o14b3ob 3o14b4o$bobobo16bo3bo16bobobo$o21bo3bo21bo$3bo41bo$o2bo17b3ob3o17bo2bo $obo43bobo3$20bob2ob2obo$15bo3bo9bo3bo$14b2o7bobo7b2o$15bo2b2ob2o3b2ob 2o2bo$11b2ob2o2bo11bo2b2ob2o$10bo7b2o9b2o7bo$14bo3bo11bo3bo$10b2obo21b ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART THUMBSIZE 2 ZOOM 8 WIDTH 600 HEIGHT 600 GPS 6 LOOP 12 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagolue: here

References

  1. ↑ Adam P. Goucher. "Haul". Catagolue. Retrieved on August 12, 2016.
  2. ↑ Apple Bottom (August 12, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  3. ↑ dani (September 8, 2021). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  4. ↑ BlinkerSpawn (August 12, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  5. ↑ GUYTU6J (February 5, 2020). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
  6. ↑ KtT (September 23, 2024). Re: Still Life Synthesis Thread (discussion thread) at the ConwayLife.com forums
Retrieved from "https://conwaylife.com/w/index.php?title=Cloverleaf_interchange&oldid=155859"