Difference between revisions of "X66"
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(B78/S78 stability) 

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{{Spaceshipname=x66pname=x66bx=9by=11h=31dir=Orthogonalp=4s=c/2c=34discoverer=Hartmut Holzwartdiscoveryear=1992life105=truelife106=trueplaintext=truerle=trueanimated=true}}  {{Spaceshipname=x66pname=x66bx=9by=11h=31dir=Orthogonalp=4s=c/2c=34discoverer=Hartmut Holzwartdiscoveryear=1992life105=truelife106=trueplaintext=truerle=trueanimated=true}}  
−  '''x66''' is a [[period]] [[:Category:Spaceships with period 44]] [[spaceship]] with [[speed]] [[c/2 orthogonalc/2]] that was found by [[:Category:Patterns found by Hartmut HolzwartHartmut Holzwart]] in July [[:Category:Patterns found in 19921992]]. 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 neighbourhoodneighbours]] (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.  +  '''x66''' is a [[period]] [[:Category:Spaceships with period 44]] [[spaceship]] with [[speed]] [[c/2 orthogonalc/2]] that was found by [[:Category:Patterns found by Hartmut HolzwartHartmut Holzwart]] in July [[:Category:Patterns found in 19921992]]. 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 neighbourhoodneighbours]] (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 Lifelike rules allowing birth or survival for a cell with 7 or 8 neighbors. 
==See also==  ==See also== 
Revision as of 19:34, 18 August 2011
x66  
View animated image  
View static image  
Pattern type  Spaceship  

Number of cells  34  
Bounding box  9×11  
Direction  Orthogonal  
Period  4  
Mod  Unknown  
Speed  c/2  
Speed (unsimplified)  Unknown  
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 Lifelike rules allowing birth or survival for a cell with 7 or 8 neighbors.
See also
External links
 x66 at the Life Lexicon