Difference between revisions of "X66"

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m (Removed Life 1.05 and 1.06)
(update synthesis cost, add a couple more links)
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|isorulemin      = B3-cy/S2-n3-ceky
 
|isorulemin      = B3-cy/S2-n3-ceky
 
|isorulemax      = B34ejkq5-ajk6-ai78/S234-ajkqw5-iqy6-a78
 
|isorulemax      = B34ejkq5-ajk6-ai78/S234-ajkqw5-iqy6-a78
|synthesis        = 13
+
|synthesis        = 12
 
|synthesisRLE    = true
 
|synthesisRLE    = true
 
|plaintext        = true
 
|plaintext        = true
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'''x66''' is a [[period]] [[:Category:Spaceships with period 4|4]] [[spaceship]] with [[speed]] [[c/2 orthogonal|c/2]] that was found by [[:Category:Patterns found by Hartmut Holzwart|Hartmut Holzwart]] in July [[:Category:Patterns found in 1992|1992]]. One of the symmetric halves can alternatively be escorted by a [[heavyweight spaceship]]. Its name refers to the fact that every [[cell]] (alive or dead) has at most 6 live [[Moore neighbourhood|neighbours]] (in contrast to spaceships based on [[lightweight spaceship]]s, [[middleweight spaceship]]s, or heavyweight spaceships). In fact, this spaceship was found via a search with this restriction. From this follows that the spaceship is stable also in Life-like rules allowing birth or survival for a cell with 7 or 8 neighbors.
 
'''x66''' is a [[period]] [[:Category:Spaceships with period 4|4]] [[spaceship]] with [[speed]] [[c/2 orthogonal|c/2]] that was found by [[:Category:Patterns found by Hartmut Holzwart|Hartmut Holzwart]] in July [[:Category:Patterns found in 1992|1992]]. One of the symmetric halves can alternatively be escorted by a [[heavyweight spaceship]]. Its name refers to the fact that every [[cell]] (alive or dead) has at most 6 live [[Moore neighbourhood|neighbours]] (in contrast to spaceships based on [[lightweight spaceship]]s, [[middleweight spaceship]]s, or heavyweight spaceships). In fact, this spaceship was found via a search with this restriction. From this follows that the spaceship is stable also in Life-like rules allowing birth or survival for a cell with 7 or 8 neighbors.
  
x66 was first synthesized on January 11, 2015, requiring 166 gliders. After the emergence of this spaceship in a symmetrical soup on March 8, 2015,<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=17556#p17556|title=Re: Soup search results|author=flipper77|date=March 8, 2015|accessdate=March 18, 2016}}</ref> this was drastically reduced to 13 gliders.
+
x66 was first synthesized on January 11, 2015, requiring 166 gliders.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=15974#p15974|title=
 +
Re: Small Spaceship Syntheses|author=Martin Grant|date=January 11, 2015|accessdate=March 18, 2019}}</ref> After the emergence of this spaceship in a symmetrical soup on March 8, 2015,<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=17556#p17556|title=Re: Soup search results|author=flipper77|date=March 8, 2015|accessdate=March 18, 2016}}</ref> this was drastically reduced to 13 gliders,<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?p=17556#p17556|title=Re: Soup search results|author=flipper77|date=March 8, 2015|accessdate=March 18, 2019}}</ref>, and then to 12 gliders in 2018.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=55127#p55127|title=|author=2718281828|date=January 15, 2018|accessdate=March 18, 2019}}</ref>
  
 
Half of x66 can be supported by a [[heavyweight spaceship]]. Since the heavyweight spaceship is glide symmetric, it can support two halves at once, or one half alongside a [[sidecar]].
 
Half of x66 can be supported by a [[heavyweight spaceship]]. Since the heavyweight spaceship is glide symmetric, it can support two halves at once, or one half alongside a [[sidecar]].

Revision as of 14:50, 18 March 2019

x66
2bo$2o$o2b3o2bo$o4b3o$b3o2b2o2$b3o2b2o$o4b3o$o2b3o2bo$2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 -1/2 0 THUMBSIZE 2 GPS 4 ]]
Pattern type Spaceship
Number of cells 34
Bounding box 9×11
Direction Orthogonal
Period 4
Mod 4
Speed c/2
Speed (unsimplified) 2c/4
Heat 31
Discovered by Hartmut Holzwart
Year of discovery 1992

x66 is a period 4 spaceship with speed c/2 that was found by Hartmut Holzwart in July 1992. One of the symmetric halves can alternatively be escorted by a heavyweight spaceship. Its name refers to the fact that every cell (alive or dead) has at most 6 live neighbours (in contrast to spaceships based on lightweight spaceships, middleweight spaceships, or heavyweight spaceships). In fact, this spaceship was found via a search with this restriction. From this follows that the spaceship is stable also in Life-like rules allowing birth or survival for a cell with 7 or 8 neighbors.

x66 was first synthesized on January 11, 2015, requiring 166 gliders.[1] After the emergence of this spaceship in a symmetrical soup on March 8, 2015,[2] this was drastically reduced to 13 gliders,[3], and then to 12 gliders in 2018.[4]

Half of x66 can be supported by a heavyweight spaceship. Since the heavyweight spaceship is glide symmetric, it can support two halves at once, or one half alongside a sidecar.

Image gallery

Half of x66 supported by a heavyweight spaceship
RLE: here

See also

References

  1. Martin Grant (January 11, 2015). "Re: Small Spaceship Syntheses". Retrieved on March 18, 2019.
  2. flipper77 (March 8, 2015). "Re: Soup search results". Retrieved on March 18, 2016.
  3. flipper77 (March 8, 2015). "Re: Soup search results". Retrieved on March 18, 2019.
  4. You must specify title = and url = when using {{cite web}}.2718281828 (January 15, 2018). "". Retrieved on March 18, 2019.

External links

  • 34P4H2V0.23 at Heinrich Koenig's Game of Life Object Catalogs