Period-20 glider gun

From LifeWiki
Jump to navigation Jump to search
Period-20 glider gun
x = 78, y = 42, rule = B3/S23 25bo14bo$24bobo12bobob2o$23bo2bo2b2o7bo2bobobob2o$23bob2obobo8b3obobob o$22b2o4bo13b4obo2bo$24b2o2b2o9b3o5bobobo$24bo3b3o7bo4b2o2bobobo$21b2o bo3b3o7b2o2bo3b2ob2o$22bob2o2b3o11b3o2bo$22bo5b3o12b2ob2o$23b3o2b2o15b 2ob2o$25bo22bo2bo$29b2obo12bo2bob2o$29bo2bo7b2ob2o4bo$29bo2bo7bo4b3obo 4bo6b2o$31b2o8bo6bo4bobo4bo2bo2bo4b2o$26b2o5b2o8bob3o4bo2bo4bobo3b3o2b obo2b2o$15b2o5b2obobo5bo7b5o6b4ob2obo2b3o3bobo2bo2bo$5b2o4bo2bo2bo3bob obobobobo8bobo14bobobobo2bo2bob2obobo$2o2bobo2b3o3bobo3bo3bo2b2o9b2obo 11b3o3b2o4bo2bo4bob2o$o2bo2bobo3b3o2bob2ob4o4b2ob2o7b2o9bo6bo2bo3bo3b 2obo$bobobo2bo2bo2bobobobo9bo4bo5b2o8b3o2bobo2b2o2bobobo4bo$2obo2bobo 2b2obobo4bobo7bo6bobo10b2obobob2o2bobob2ob5o$3bob2ob2o2b2obo6bobo7bob 2o3bo10bo4bo4b2o2bo3bo$3bo4bobo2bob2o3bobo26bo3b2obobobo3bo3bo2bo$4b5o b2obobo2bo6b2o15bo6bo3bo2b2obo2bob2o3b3o$9bo3bo2b2obobo3b2o13b2ob2o4bo 4bo4bob2o$6bo2bo3bo3bobobobo2bo8bo6bo6bo3bo2b2obo2bob2o3b3o$6b3o3b2obo 2bob2o4bo7b3o12bo3b2obobobo3bo3bo2bo$15b2obo3bobo2bo5b2ob2o12bo4bo4b2o 2bo3bo$6b3o3b2obo2bob2o4bo7b3o14b2obobob2o2bobob2ob5o$6bo2bo3bo3bobobo bo2bo8bo15b3o2bobo2b2o2bobobo4bo$9bo3bo2b2obobo3b2o26bo6bo2bo3bo3b2obo $4b5ob2obobo2bo6b2o27b3o3b2o4bo2bo4bob2o$3bo4bobo2bob2o3bobo34bobobobo 2bo2bob2obobo$3bob2ob2o2b2obo6bobo8bo2bo15b4ob2obo2b3o3bobo2bo2bo$2obo 2bobo2b2obobo4bobo7bo2b2o2bo13bo2bo4bobo3b3o2bobo2b2o$bobobo2bo2bo2bob obobo10bo2b2o2bo14bobo4bo2bo2bo4b2o$o2bo2bobo3b3o2bob2ob4o7b4o17bo6b2o $2o2bobo2b3o3bobo4bo2bo5bobo2bobo$5b2o4bo2bo2bo4bobo6b2o4b2o$15b2o6bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 6 AUTOSTART OFF ]]
Pattern type Gun
Number of cells 672
Bounding box 78×42
Period 20
Barrels 1
Discovered by Matthias Merzenich
Noam Elkies
Year of discovery 2013

Period-20 glider gun is a true period-20 glider gun that was discovered by Matthias Merzenich in 2013 and improved by Karel Suhajda[1], based on Elkies' true period 24 gun. This is the shortest-period true-period gun known so far.

Filtering the output of the gun with a blocker yields the smallest known period-40 glider gun, beating the eponymous period-40 glider gun at its own game. The further addition of Rich's p16 doubles the period again, resulting in the smallest known period-80 gun, and adding 68P32.1 on top of that doubles the period once more to 160.

Image gallery

Animation of period-20 gun

References

  1. Matthias Merzenich (May 13, 2013). "p20 gun". Retrieved on March 17, 2015.