Period-30 glider gun

A period-30 glider gun is any glider gun with true period 30. The first one is the Gosper glider gun found by Bill Gosper in November 1970. Many known period-30 glider guns are made from two or more interacting queen bees. Paul Callahan found 30 different ways that three queen bees react to form a period 30 glider gun. One of them is shown below.

x = 37, y = 27, rule = B3/S23 2o$bo$bobo6bo13bo$2b2o6b4o8bobo$11b4o6bobo$11bo2bo5bo2bo$11b4o6bobo$ 10b4o8bobo8b2o$10bo13bo8bobo$35bo$35b2o2$16b3o$15b2ob2o$15b2ob2o$15b5o $14b2o3b2o7$14b2o$15bo$12b3o$12bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 Z 12 HEIGHT 480 GPS 10 AUTOSTART PAUSE 2 ]]

(click above to open LifeViewer) RLE: here Plaintext: here

Other than the Gosper glider gun, there are three reactions involving two queen bees that produce gliders, of which two are "self-destructive" because the output gliders react with the queen bees before they can escape.

These were last reported by Mark Niemiec:

x = 87, y = 13, rule = B3/S23 50b2o$51bo$12bo38bobo7bo$12bobo7bo29b2o7bobo$13bobo5bobo40b2o8bo$13bo 2bo2b2o3bo39b2o6bobo$13bobo3b2o3bo39b2o5bobo$2b2o8bobo4b2o3bo36bobo6bo 2bo$bobo8bo8bobo8b2o27bo9bobo$bo20bo9bobo37bobo8b2o$2o32bo39bo8bobo$ 34b2o49bo$85b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 Z 8 HEIGHT 320 WIDTH 800 GPS 10 AUTOSTART PAUSE 2 T 20 PAUSE 2 LOOP 21 ]]

(click above to open LifeViewer) RLE: here Plaintext: here

The reaction below with an additional clock was found by Entity Valkyrie:

x = 24, y = 24, rule = B3/S23 8bo$6b3o$5bo$5b2o6$2o3b2o$2o3b2o$b5o$2bobo$22b2o$2b3o17bo$11bobo6bobo$ 9bo3bo6b2o$9bo$8bo4bo$9bo$bo7bo3bo$bobo7bobo$obo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 Z 12 HEIGHT 480 WIDTH 480 GPS 10 AUTOSTART PAUSE 2 T 23 PAUSE 2 LOOP 24 ]]

(click above to open LifeViewer) RLE: here Plaintext: here

On February 15, 2022, Charity Engine found a tetramer version of this gun (monomerised below), which only uses a single copy of the queen bee shuttle:

x = 27, y = 17, rule = B3/S23 12b2o$12b2o3$6b2o3b3o$7bo3b2obo2b2o$b2ob3o6b2o2b2o$b2obo8b2o$4bo19b2o$ b3o20bobo$o2b2o3b2o15b2o$2o6bobo10bo$11bo8bobo$8bo2bo7bo3bo$11bo8bobo$ 8bobo10bo$8b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 Z 12 HEIGHT 480 WIDTH 480 GPS 10 AUTOSTART ]]

(click above to open LifeViewer) RLE: here Plaintext: here

On March 1, 2022, David Raucci found a p30 pi factory, which iNoMed used to create the first p30 gun with no queen bees.

x = 38, y = 31, rule = B3/S23 14bo$14b3o$17bo$16b2o$4bo5bo$3bobo3bobo$2bo2bo3bobo18b8o$2bobob2obob2o 17bob4obo$3b2obob2o3bo16b8o$5b2o3b2ob2o5b2o$3b2o3b2o4bo4bobo$3bo2bo3bo 3bo5b2o$2obob4obo3bo5bo$bo2b2o2bobo3bo$bo5bo2bob2o$2b4obob2obo$6bo2bo 2bo$4bo4bobo4b2o5bo$4b2o4bo3b3o2b3obo$13bo4bob2ob3o$12bo2b4o7bo$13b3o 3b2ob4o$17bob2obo$15b3o5bo$14bo6b3o$12bo2b2obo5b2o$12b2obobo2bob2o2bo$ 15bo2b3obo2bo$15bo7b2o$16b3o$18bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 Z 12 HEIGHT 480 WIDTH 480 GPS 10 AUTOSTART ]]

(click above to open LifeViewer) RLE: here Plaintext: here

External links

• p30 gun at the Life Lexicon
• Period-30 glider gun at Adam P. Goucher's Catagolue