Copperhead: Difference between revisions
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===Cottonmouth=== | ===Cottonmouth=== | ||
[[Cottonmouth|A true pushalong]] was found by [[AforAmpere]] on March 24, 2018.<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=2031&hilit=cottonmouth&start=600#p58357|title=Re: Spaceship Discussion Thread|author=AforAmpere|date=March 24, 2018|accessdate=August 30, 2018}}</ref> | [[Cottonmouth|A true pushalong]] was found by [[AforAmpere]] on March 24, 2018.<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=2031&hilit=cottonmouth&start=600#p58357|title=Re: Spaceship Discussion Thread|author=AforAmpere|date=March 24, 2018|accessdate=August 30, 2018}}</ref> | ||
===Beehive tagalong=== | |||
A 2c/20 tagalong is also known.<ref>http://www.conwaylife.com/forums/viewtopic.php?f=2&t=576&p=64623#p64623</ref> | |||
==Synthesis== | ==Synthesis== | ||
Revision as of 09:35, 30 November 2018
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| Pattern type | Spaceship | ||||||||
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| Number of cells | 28 | ||||||||
| Bounding box | 6 × 12 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 10 (mod: 10) | ||||||||
| Speed | c/10 | Unknown | ||||||||
| Heat | 27.8 | ||||||||
| Kinetic symmetry | Unspecified | ||||||||
| 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]
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.[2] 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.
Fireship
Simon Ekström found what appeared to be a tagalong with a large spark on March 20, 2016.[3] 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.[4] However, blocks hauled by the tagalongs in tagalong pyramids are unaffected, and are thus true tagalongs.
Cottonmouth
A true pushalong was found by AforAmpere on March 24, 2018.[5]
Beehive tagalong
A 2c/20 tagalong is also known.[6]
Synthesis
The first synthesis was proposed by Aidan F. Pierce 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. A copperhead gun was then completed by Alexey Nigin on March 6, 2016.[7] A faster gun was constructed one day later.[8]
gmc_nxtman reduced the copperhead's synthesis cost to 14 gliders on July 9, 2017;[9] 2718281828 posted a 13-glider synthesis on January 9, 2018.[10]
Soup search results
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.[11] Several more copperheads have since been found in this and other related symmetries. It is the first and currently only spaceship with a non-standard speed to appear in a symmetric soup search.
Naming
Various names were proposed on the day of the ship's discovery; for example copperhead, blockhauler, decapod, cuttlefish and blockfish. zdr settled on copperhead.[12]
Gallery
 View animated image |
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In other rules
In the cellular automaton 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.
See also
References
- ↑ zdr (March 5, 2016). "is this c/10 spaceship known?". Retrieved on March 5, 2016.
- ↑ Dean Hickerson (6 March, 2016). "Re: is this c/10 spaceship known?".
- ↑ Simon Ekström (March 20, 2016). "Re: is this c/10 spaceship known?". Retrieved on March 20, 2016.
- ↑ towerator (20 March 2016). "Re: is this c/10 spaceship known?". Retrieved on 30 June 2016.
- ↑ AforAmpere (March 24, 2018). "Re: Spaceship Discussion Thread". Retrieved on August 30, 2018.
- ↑ http://www.conwaylife.com/forums/viewtopic.php?f=2&t=576&p=64623#p64623
- ↑ Alexey Nigin (March 6, 2016). "Re: is this c/10 spaceship known?". Retrieved on March 6, 2016.
- ↑ gmc_nxtman (7 March, 2016). "Re: is this c/10 spaceship known?". Retrieved on 8 March, 2016.
- ↑ gmc_nxtman (July 9, 2017). "Re: is this c/10 spaceship known?". Retrieved on July 9, 2017.
- ↑ 2718281828 (January 9, 2018). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
- ↑ Apple Bottom (April 4, 2016). "Haul". Catagolue. Retrieved on April 4, 2016.
- ↑ zdr (6 March 2016). "Re: is this c/10 spaceship known?". Retrieved on 5 July 2016.
External links
- 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
- 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 heat 27
- Spaceships with mod 10
- Non-monotonic spaceships
- Patterns with bilateral orthogonal symmetry