Copperhead: Difference between revisions
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|z = c/10 | |z = c/10 | ||
|h = 27.8 | |h = 27.8 | ||
|symmetry = -e | |||
|discoverer = zdr | |discoverer = zdr | ||
|discoveryear = 2016 | |discoveryear = 2016 | ||
|rulemin = B3/S23 | |rulemin = B3/S23 | ||
|rulemax = B38/S0238 | |rulemax = B38/S0238 | ||
|isorulemin = B3-ceky/S23-cik | |isorulemin = B3-ceky/S23-cik | ||
|isorulemax = B34ceq5aeijk6aen7c8/S0234ceijyz5ekn6-a7e8 | |isorulemax = B34ceq5aeijk6aen7c8/S0234ceijyz5ekn6-a7e8 | ||
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|pentadecathlonid = 28P10H1V0.1 | |pentadecathlonid = 28P10H1V0.1 | ||
}} | }} | ||
'''Copperhead''' is a [[c/10 orthogonal]] [[spaceship]] discovered by [[zdr]] on March 5, {{year|2016}} using a | '''Copperhead''' is a [[c/10 orthogonal]] [[spaceship]] discovered by [[zdr]] on March 5, {{year|2016}}<ref name="post27988" /> using a new program that later came to be known as [[zfind]], based on David Eppstein's [[gfind]] search program. It was the first spaceship of this speed to be discovered, and surprised many due to its small size and high period. | ||
Various names were proposed on the day of the ship's discovery; for example copperhead, blockhauler, decapod, cuttlefish and blockfish. zdr settled on copperhead.<ref name="post28078" /> | Various names were proposed on the day of the ship's discovery; for example copperhead, blockhauler, decapod, cuttlefish and blockfish. zdr settled on copperhead.<ref name="post28078" /> | ||
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<div style="clear:left"> | <div style="clear:left"> | ||
==Reactions== | |||
== Reactions == | |||
The ship hauls a [[block]] behind it, which makes for interesting reactions involving other ships. [[Dean Hickerson]] built a [[sawtooth]] that uses copperhead's ability to turn a [[heavyweight spaceship]] into a [[loaf]].<ref name="post28119" /> It can also eat gliders and [[middleweight spaceship]]s cleanly from behind, and [[lightweight spaceship]]s from the side of the block. Its front end can cleanly burn through [[blinker]]s, creating [[blinker fuse#c/10 orthogonal|a c/10 blinker fuse]]. | The ship hauls a [[block]] behind it, which makes for interesting reactions involving other ships. [[Dean Hickerson]] built a [[sawtooth]] that uses copperhead's ability to turn a [[heavyweight spaceship]] into a [[loaf]].<ref name="post28119" /> It can also eat gliders and [[middleweight spaceship]]s cleanly from behind, and [[lightweight spaceship]]s from the side of the block. Its front end can cleanly burn through [[blinker]]s, creating [[blinker fuse#c/10 orthogonal|a c/10 blinker fuse]]. | ||
{{EmbedViewer | {{EmbedViewer | ||
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}} | }} | ||
===Fireship=== | === Fireship === | ||
{{main|Fireship}} | {{main|Fireship}} | ||
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A [[Fireship#Beehive tagalong|2c/20 tagalong for the fireship]] is also known, discovered by [[Christoph Reinthaler]] on October 11, 2018.<ref name="post64623" /> | A [[Fireship#Beehive tagalong|2c/20 tagalong for the fireship]] is also known, discovered by [[Christoph Reinthaler]] on October 11, 2018.<ref name="post64623" /> | ||
===Cottonmouth=== | === Cottonmouth === | ||
{{main|Cottonmouth}} | {{main|Cottonmouth}} | ||
A true [[pushalong]] known as the [[cottonmouth]] was found by [[AforAmpere]] on March 24, 2018 for both the copperhead and the similar [[fireship]]. Because its front end matches that of the copperhead, it is infinitely [[extensible]] by stacking on itself.<ref name="post58357" /> | A true [[pushalong]] known as the [[cottonmouth]] was found by [[AforAmpere]] on March 24, 2018 for both the copperhead and the similar [[fireship]]. Because its front end matches that of the copperhead, it is infinitely [[extensible]] by stacking on itself.<ref name="post58357" /> | ||
==Occurrence== | == Occurrence == | ||
The first copperhead to emerge from the [[ash]] of a [[soup]] appeared on April 4, 2016 in a [[D2_+2]] [[haul]] submitted to [[Catagolue]] by [[Apple Bottom]].<ref name="post29637" /> Several more copperheads have since been found in this and other related symmetries. It was the first spaceship with a [[Standard spaceship|non-standard speed]] to appear in a soup search, and the only such spaceship until the [[c/7 orthogonal]] [[loafer]] in 2020. | The first copperhead to emerge from the [[ash]] of a [[soup]] appeared on April 4, 2016 in a [[D2_+2]] [[haul]] submitted to [[Catagolue]] by [[Apple Bottom]].<ref name="post29637" /> Several more copperheads have since been found in this and other related symmetries. It was the first spaceship with a [[Standard spaceship|non-standard speed]] to appear in a soup search, and the only such spaceship until the [[c/7 orthogonal]] [[loafer]] in 2020. | ||
==Synthesis and guns== | == Synthesis and guns == | ||
The first final step for a [[glider synthesis]], starting from a large, unsynthesized still life, was proposed by [[praosylen]] on the day of discovery. An alternative synthesis utilising [[fumarole]] as a predecessor, presented by [[Tanner Jacobi]] an hour later, was much more efficient. After optimizations by [[Mark Niemiec]] and [[Chris Cain]] the total synthesis cost made 22 gliders.<ref name="post28085" /> In a different approach, [[gmc_nxtman]] reduced the copperhead's synthesis cost to 14 gliders on July 9, 2017;<ref name="post46308" /> [[2718281828]] posted a 13-glider synthesis on January 9, 2018.<ref name="post54874" /> | The first final step for a [[glider synthesis]], starting from a large, unsynthesized still life, was proposed by [[praosylen]] on the day of discovery. An alternative synthesis utilising [[fumarole]] as a predecessor, presented by [[Tanner Jacobi]] an hour later, was much more efficient. After optimizations by [[Mark Niemiec]] and [[Chris Cain]] the total synthesis cost made 22 gliders.<ref name="post28085" /> In a different approach, [[gmc_nxtman]] reduced the copperhead's synthesis cost to 14 gliders on July 9, 2017;<ref name="post46308" /> [[2718281828]] posted a 13-glider synthesis on January 9, 2018.<ref name="post54874" /> | ||
Based on the fumarole route, [[Alexey Nigin]] constructed a period-690 copperhead [[gun]] on March 6, 2016,<ref name="post28101" /> and gmc_nxtman constructed a period-376 gun one day later.<ref name="post28176" /> On August 16, 2018, [[Goldtiger997]] posted a stable glider-to-copperhead [[converter]] based on the latter route, allowing for copperhead guns with period at least 197 to be built.<ref name="post62681" /> | Based on the fumarole route, [[Alexey Nigin]] constructed a period-690 copperhead [[gun]] on March 6, 2016,<ref name="post28101" /> and gmc_nxtman constructed a period-376 gun one day later.<ref name="post28176" /> On August 16, 2018, [[Goldtiger997]] posted a stable glider-to-copperhead [[converter]] based on the latter route, allowing for copperhead guns with period at least 197 to be built.<ref name="post62681" /> | ||
==Gallery== | == Gallery == | ||
{{gallery top}} | {{gallery top}} | ||
{{gallery item|{{EmbedViewer | {{gallery item|{{EmbedViewer | ||
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|viewerconfig = #C [[ ZOOM 12 WIDTH 640 HEIGHT 400 AUTOSTART GPS 5 PAUSE 2 LOOP 80 ]] | |viewerconfig = #C [[ ZOOM 12 WIDTH 640 HEIGHT 400 AUTOSTART GPS 5 PAUSE 2 LOOP 80 ]] | ||
|position = center | |position = center | ||
|caption = Left: a copperhead [[eater]] found by Simon Ekström.<ref name="post28146" /> Right: a copperhead-to-glider converter found by [[James Pascua]].<ref name="post108519" /> Both involve a [[claw with tail]] | |caption = Left: a copperhead [[eater]] found by Simon Ekström.<ref name="post28146" /> Right: a copperhead-to-glider converter found by [[James Pascua]].<ref name="post108519" /> Both involve a [[claw with tail]]. | ||
|style = width:300px; | |style = width:300px; | ||
}}}} | }}}} | ||
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{{gallery bottom}} | {{gallery bottom}} | ||
== | == In other rules == | ||
[[File:Goldenhead.png|frame|right|DryLife's goldenhead.]] | [[File:Goldenhead.png|frame|right|DryLife's goldenhead.]] | ||
In {{rl|DryLife}}, an extremely similar spaceship (dubbed the '''goldenhead''') also travels at c/10 orthogonal. It differs from the normal copperhead by 2 cells in one phase. A normal copperhead at this phase will turn into a goldenhead in DryLife, and conversely this phase will return to a copperhead in normal Life. | In {{rl|DryLife}}, an extremely similar spaceship (dubbed the '''goldenhead''') also travels at c/10 orthogonal. It differs from the normal copperhead by 2 cells in one phase. A normal copperhead at this phase will turn into a goldenhead in DryLife, and conversely this phase will return to a copperhead in normal Life. | ||
{{EmbedViewer | |||
|pname = goldenhead | |||
|viewerconfig = #C [[ ZOOM 16 HEIGHT 350 GPS 5 AUTOSTART TRACKLOOP 10 0 -0.1 ]] | |||
|position = center | |||
|caption = Goldenhead | |||
|style = width:300px; | |||
|apgcode = xq10_o5995ozes88sezw33/b37s23 | |||
}} | |||
==See also== | == See also == | ||
* [[Loafer]] | * [[Loafer]] | ||
==References== | == References == | ||
<references> | <references> | ||
<ref name="post27988">{{LinkForumThread | <ref name="post27988">{{LinkForumThread | ||
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</references> | </references> | ||
==External links== | == External links == | ||
* {{LinkCatagolue|xq10_o5995ozes88sezw33}} | * {{LinkCatagolue|xq10_o5995ozes88sezw33}} | ||
* {{LinkPentadecathlonObject|28P10H1V0.1}} | * {{LinkPentadecathlonObject|28P10H1V0.1}} | ||
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[[Category:Non-monotonic spaceships]] | [[Category:Non-monotonic spaceships]] | ||
[[Category:Patterns discovered by pseudonymous users]] | [[Category:Patterns discovered by pseudonymous users]] | ||
{{seminatural}} | {{seminatural}} | ||
__NOTOC__ | __NOTOC__ | ||
Latest revision as of 23:29, 14 February 2026
| Copperhead | |||||||||
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| View static image | |||||||||
| Pattern type | Spaceship | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 28 | ||||||||
| Bounding box | 6 × 12 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 10 (mod: 10) | ||||||||
| Speed | c/10 | c/10 | ||||||||
| Heat | 27.8 | ||||||||
| Kinetic symmetry | -e | ||||||||
| Discovered by | zdr | ||||||||
| Year of discovery | 2016 | ||||||||
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Copperhead is a c/10 orthogonal spaceship discovered by zdr on March 5, 2016[1] using a new program that later came to be known as zfind, based on David Eppstein's gfind search program. It was the first spaceship of this speed to be discovered, and surprised many due to its small size and high period.
Various names were proposed on the day of the ship's discovery; for example copperhead, blockhauler, decapod, cuttlefish and blockfish. zdr settled on copperhead.[2]
Copperhead ranked second place in the Pattern of the Year 2016 competition on the ConwayLife.com forums, behind the caterloopillars.[3]
Reactions
The ship hauls a block behind it, which makes for interesting reactions involving other ships. Dean Hickerson built a sawtooth that uses copperhead's ability to turn a heavyweight spaceship into a loaf.[4] It can also eat gliders and middleweight spaceships cleanly from behind, and lightweight spaceships from the side of the block. Its front end can cleanly burn through blinkers, creating a c/10 blinker fuse.
| The c/10 copperhead blinker fuse (click above to open LifeViewer) RLE: here Plaintext: here |
Fireship
- Main article: Fireship
Simon Ekström found what appeared to be a tagalong with a large spark on March 20, 2016.[5] Unlike most tagalongs, this tagalong actually temporarily interacts with the hauled block, and is thus not a true tagalong but a whole new spaceship, named fireship due to its unusual spark. However, blocks hauled by the tagalongs in tagalong pyramids are unaffected, and are thus true tagalongs.[6]
A 2c/20 tagalong for the fireship is also known, discovered by Christoph Reinthaler on October 11, 2018.[7]
Cottonmouth
- Main article: Cottonmouth
A true pushalong known as the cottonmouth was found by AforAmpere on March 24, 2018 for both the copperhead and the similar fireship. Because its front end matches that of the copperhead, it is infinitely extensible by stacking on itself.[8]
Occurrence
The first copperhead to emerge from the ash of a soup appeared on April 4, 2016 in a D2_+2 haul submitted to Catagolue by Apple Bottom.[9] Several more copperheads have since been found in this and other related symmetries. It was the first spaceship with a non-standard speed to appear in a soup search, and the only such spaceship until the c/7 orthogonal loafer in 2020.
Synthesis and guns
The first final step for a glider synthesis, starting from a large, unsynthesized still life, was proposed by praosylen on the day of discovery. An alternative synthesis utilising fumarole as a predecessor, presented by Tanner Jacobi an hour later, was much more efficient. After optimizations by Mark Niemiec and Chris Cain the total synthesis cost made 22 gliders.[10] In a different approach, gmc_nxtman reduced the copperhead's synthesis cost to 14 gliders on July 9, 2017;[11] 2718281828 posted a 13-glider synthesis on January 9, 2018.[12]
Based on the fumarole route, Alexey Nigin constructed a period-690 copperhead gun on March 6, 2016,[13] and gmc_nxtman constructed a period-376 gun one day later.[14] On August 16, 2018, Goldtiger997 posted a stable glider-to-copperhead converter based on the latter route, allowing for copperhead guns with period at least 197 to be built.[15]
Gallery
| Left: a copperhead eater found by Simon Ekström.[16] Right: a copperhead-to-glider converter found by James Pascua.[17] Both involve a claw with tail. (click above to open LifeViewer) RLE: here Plaintext: here |
In other rules
In DryLife, an extremely similar spaceship (dubbed the goldenhead) also travels at c/10 orthogonal. It differs from the normal copperhead by 2 cells in one phase. A normal copperhead at this phase will turn into a goldenhead in DryLife, and conversely this phase will return to a copperhead in normal Life.
| Goldenhead (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
See also
References
- ↑ zdr (March 5, 2016). is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ zdr (March 6, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ Alexey Nigin (June 3, 2017). Pattern of the Year 2016 (Results) (discussion thread) at the ConwayLife.com forums
- ↑ Dean Hickerson (March 6, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ Simon Ekström (March 20, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ towerator (March 20, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ Christoph Reinthaler (October 11, 2018). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
- ↑ AforAmpere (March 24, 2018). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Apple Bottom (April 4, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Chris Cain (March 6, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ gmc_nxtman (July 9, 2017). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ 2718281828 (January 9, 2018). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ Alexey Nigin (March 6, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ gmc_nxtman (March 7, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ Goldtiger997 (August 16, 2018). Re: Stable signal converters (discussion thread) at the ConwayLife.com forums
- ↑ Simon Ekström (March 6, 2016). Re: is this c/10 spaceship known? (discussion thread) at the ConwayLife.com forums
- ↑ James Pascua (October 30, 2020). Re: Stable signal converters (discussion thread) at the ConwayLife.com forums
External links
- Copperhead at Adam P. Goucher's Catagolue
- 28P10H1V0.1 at Heinrich Koenig's Game of Life Object Catalogs
- Copperhead at the Life Lexicon
- Alexey Nigin: New Spaceship Speed in Conway’s Game of Life
Categories:
- Patterns
- Spaceships with 28 cells
- Periodic objects with minimum population 28
- Patterns with 28 cells
- Patterns found by zdr
- Patterns found in 2016
- Patterns that can be constructed with 13 gliders
- Spaceships
- Spaceships with period 10
- Orthogonal spaceships
- Spaceships with speed c/10
- Spaceships with unsimplified speed c/10
- Spaceships with heat 27
- Spaceships with mod 10
- Spaceships with -e symmetry
- Pattern of the Year top contenders
- Non-monotonic spaceships
- Patterns discovered by pseudonymous users
- Semi-natural periodic objects