Highway robber

A highway robber is any mechanism that can retrieve a signal from a spaceship lane while allowing spaceships on nearby lanes (even those a single lane away) to pass by unaffected. In practice the spaceship is generally a glider. The spaceship is removed from the lane in question, an output signal is generated elsewhere, and the highway robber returns to its original state. A competent highway robber does not affect spaceships even on the lane adjacent to the affected spaceship stream, except perhaps during the highway robber's recovery period.[1]

A stable highway robber with repeat time 878 was assembled by Chris Cain in 2016,[2] with an update by Entity Valkyrie in January 2019[3] to simplify the extraction of the output signal. A simpler highway robber with improved clearance and repeat time 876 was constructed by Louis-François Handfield in May 2020,[4] with subsequent improvements made by Goldtiger997.[5] The next version made use of the Bandersnatch to reduce the repeat time to 863 ticks.[6] On June 23, Goldtiger997 posted a larger staged recovery highway robber with a repeat time of 742 ticks.[7]

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A stable highway robber with 742-tick repeat time,
allowing gliders to pass by on the same lane 47+ ticks after
the activating glider. There are three possible glider outputs,
but two of them are awkwardly close to other glider lanes.
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

References
  1. Dave Greene (January 22, 2007). "Stable pseudo-Heisenburp device and other P1 wiring projects". Retrieved on December 2, 2018.
  2. Chris Cain (March 28, 2015). "Re: The Hunting of the New Herschel Conduits". Retrieved on December 2, 2018.
  3. Entity Valkyrie (January 10, 2019). "RLE:Highwayrobber".
  4. Louis-François Handfield (May 25, 2020). "Re: Highway robber challenge". Retrieved on May 25, 2020.
  5. Goldtiger997 (May 25, 2020). Re: Highway robber challenge (discussion thread) at the ConwayLife.com forums
  6. Goldtiger997 (June 5, 2020). Re: Highway robber challenge (discussion thread) at the ConwayLife.com forums
  7. Goldtiger997 (June 23, 2020). Re: Highway robber challenge (discussion thread) at the ConwayLife.com forums
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