Period-88 glider gun

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Not to be confused with the period-44 glider gun with a period-doubling mechanism.

Period-88 glider gun
#C By Matthias Merzenich, September 2009 #C Blocker supports by Jason Summers x = 46, y = 45, rule = B3/S23 14b2o14b2o$14b2o14b2o$30b2o$31bo$13b2obo13bobo$14bobo12b2obo$15bo$14b 2o$14b2o14b2o$14b2o14b2o4$4b2o35bo$4o4b2o26b3ob2o2b2o$3ob2o2b2o11b3o 12b4o4b2o$5bo14bo2bo16b2o$20bobo$21bo2$28b2o$27bo2bo$15b2o11bobo$15bob o11b2o$15bo2bo$16b2o2$24bo$23bobo$4b2o16bo2bo14bo$2o4b4o12b3o11b2o2b2o b3o$2o2b2ob3o26b2o4b4o$4bo35b2o3$14b2o2$13bo3bo12bo$12bo4bo11bobo$11bo bobo6bo5bo3bo$10bobobo8b2o4bo3bo$8bo4bo8b2o6bo3bo$8bo3bo18bo3bo$32bobo $10b2o21bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 5 GPS 15 HEIGHT 480 ]]
Pattern type Gun
Number of cells 160
Bounding box 46 × 44
Period 88
Barrels 4
Discovered by Matthias Merzenich
Year of discovery 2009


Period-88 glider gun is a true period-88 glider gun discovered by Matthias Merzenich in September 2009, and later improved by Jason Summers by using blockers to stabilize the oscillating portion.[1] The core reaction is four rotationally symmetric wings that interact with each other and are sparked to produce a mirrored image of itself after 44 generations. The figure eights create a glider in addition to stabilizing the period-88 oscillator. It can be made to have more than 1 barrel; for each additional barrel, the bounding box is decreased by two rows or columns, and population is unaffected.

The associated period-88 oscillator, which has eight blockers instead of six blockers and two figure eights, has 156 cells, heat 146.2, and volatility 0.96. The population is lower because advancing by one generation puts the blockers in a less dense phase but the figure eights in a denser phase.

References

  1. Matthias Merzenich (April 24, 2021). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums