p10 traffic light hassler

P10 traffic light hassler is a period-10 oscillator found by David Buckingham on May 1, 1983,[1] consisting of eight blocks hassling four traffic light predecessors. The version in the infobox is the introvert, with all the blocks on the sides of the traffic light towards the center. The extrovert is also possible, with the blocks closer to the edge:

<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 17, y = 20, rule = B3/S23 5b2o3b2o$5b2o3b2o4$2o2b3o3b3o2b2o$2o13b2o$4bobo3bobo$5bo5bo3$5bo5bo$4bobo3bob o$2o13b2o$2o2b3o3b3o2b2o4$5b2o3b2o$5b2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART THUMBSIZE 2 GPS 2 LOOP 10 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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p10 traffic light hassler
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 17, y = 20, rule = B3/S23 5b2o3b2o$5b2o3b2o4$4b3o3b3o$2o13b2o$2o2bobo3bobo2b2o$5bo5bo3$5bo5bo$2o2bobo3b obo2b2o$2o13b2o$4b3o3b3o4$5b2o3b2o$5b2o3b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ AUTOSTART THUMBSIZE 2 GPS 2 LOOP 10 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> File:Introvert.png <html></noscript></canvas></div></html>
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Pattern type Oscillator
Number of cells 56
Bounding box 17×20
Period 10
Mod 10
Heat 44
Volatility 0.91
Strict volatility 0.91
Discovered by David Buckingham
Year of discovery 1983

Combinations of introverts and extroverts are also possible, and blocks can also be shared with other introverts or extroverts, or with another p10 oscillator.

The first known semi-natural appearance of this oscillator was in November 2014 in a soup found by Adam P. Goucher using apgsearch.[2]

On January 7, 2020, Jeremy Tan reduced the syntheses for both introvert and extrovert to 22 gliders.[3] Matti Ward and Ian07 further reduced the introvert synthesis to 18 gliders on January 9,[4] and Jeremy Tan reduced the extrovert to 20 gliders the next day.[5]

References
  1. Dean Hickerson's oscillator stamp collection. Retrieved on October 20, 2019.
  2. Adam P. Goucher (November 25, 2014). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  3. Jeremy Tan (January 7, 2020). Re: Soup-based syntheses (discussion thread) at the ConwayLife.com forums
  4. Ian07 (January 9, 2020). Re: Soup-based syntheses (discussion thread) at the ConwayLife.com forums
  5. Jeremy Tan (January 10, 2020). Re: Soup-based syntheses (discussion thread) at the ConwayLife.com forums
  • 56P10.2 at Heinrich Koenig's Game of Life Object Catalogs
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