Spider
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Spider  
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Pattern type  Spaceship  

Number of cells  58  
Bounding box  27×8  
Direction  Orthogonal  
Period  5  
Mod  5  
Speed  c/5  
Speed (unsimplified)  c/5  
Heat  53.6  
Discovered by  David Bell  
Year of discovery  1997  
 
 
 

Spider is an orthogonal c/5 spaceship that was discovered by David Bell in April 1997. It is the smallest known c/5 orthogonal spaceship. Its side sparks have proven to be very useful in constructing puffers and rakes.
On March 7, 2019, Martin Grant found a 601glider synthesis of spider, making it the first c/5 orthogonal spaceship to be synthesized.^{[1]} Optimizations have since been found to reduce the glider count.^{[2]}
See also
References
 ↑ Martin Grant. Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
 ↑ Jeremy Tan. Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
External links
 Spider at the Life Lexicon
 The Spider (glider 18216) at David Eppstein's Glider Database
 58P5H1V0.1 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
 Patterns
 Patterns with 58 cells
 Patterns found by David Bell
 Patterns found in 1997
 Patterns that can be constructed with 101 or more gliders
 Spaceships
 Periodic objects with minimum population 58
 Spaceships with period 5
 Orthogonal spaceships
 Spaceships with speed c/5
 Spaceships with unsimplified speed c/5
 Spaceships with heat 53
 Spaceships with mod 5
 Patterns with bilateral orthogonal symmetry