Period-24 glider gun

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True period 24 gun
x = 43, y = 32, rule = B3/S23 23bo2bo$21b6o$17b2obo8bo$13b2obobobob8o2bo$11b3ob2o3bobo7b3o$10bo4b3o 2bo3bo3b2o$11b3o3b2ob4obo3bob2o$12bobo3bo5bo4bo2bo4b2obo$10bo8bob2o2b 2o2b2o5bob2obo$10b5ob4obo4b3o7bo4bo$15b2o4bo4bob3o2b2obob2ob2o$12b5ob 3o4b2ob2o3bobobobobo$11bo5b2o4b2obob2o5bo5bo$12b5o6b2obo3bo3bobob2ob2o $2ob2o9b2o2bo5bobo4bo2b3obobo$bobobobob2o3b3obo6bo2bobo4b3o2bo$o2bo7bo 6b2o3b3o8bobob2o$3o2bo4b2o11bo10bo$5b4obo17b2o4b2o$2b2obo6bo14bo3bo2b 2o$bo4bo3bo16bo6b2o$b3obo4bo16bo3bo2bo$11bo2bo3bo9b2o4bobob2o$b3obo4bo 8b2o3bo10b3o2bo$bo4bo3bo7bo6bo8b3obobo$2b2obo6bo10b3o8bobob2ob2o$5b4ob o24bo5bo$3o2bo4b2o21bobobobobo$o2bo7bo9b2o10b2obob2ob2o$bobobobob2o10b o8bo5bo4bo$2ob2o17b3o6bo4bob2obo$24bo4b3o5b2obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]]
Pattern type Gun
Number of cells 335
Bounding box 43×32
Period 24
Barrels 1
Discovered by Noam Elkies
Year of discovery 1997

Period-24 glider gun is a true period 24 gun discovered by Noam D. Elkies in 1997.[1] It uses four large period 4 oscillators (two of them variants of fountain, the other two adjoined by common casing) to hassle two T-tetrominos, which react together to produce gliders. The form on the right is a reduced variant found by Karel Suhajda.[2] The eater 1 can be replaced with a unix for compacting purposes, such as in the period-48 glider gun.

No more than five days after the initial discovery, Elkies found a method to double the period of the gun, resulting in the first known period 48 glider gun.[1] A smaller version was found in 2016 by Tanner Jacobi, using Rich's p16 to double the period.[3]

Image gallery

Original period 24 glider gun.
Period 48 glider gun.
[[:RLE:P24LWSS]] #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 24 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 4 HEIGHT 480 ]]
A p24 LWSS gun, used in broken lines.
(click above to open LifeViewer)
RLE: here Plaintext: here
x = 40, y = 31, rule = B3/S23 5b2ob2o15b2ob2o$5b2obo17bob2o$8bo5bo5bo5bo$8b2o4b2o3b2o4b2o$14bobobobo $3bobo9b2ob2o13b3o$b3ob3o24b6o$o7bo23bob3obo$2ob4obo22bo3bob2o$bo3bo 25b4ob4o$bobo2b2o4b2obo3bob2o6b2o4bob3o$2bobob2o5b3o3b3o5b2obob2obo2b 2o$3bob3o6bo5bo5b2o2bob2obob2o$5b3o18b3obo4b2o$5b3o18b4ob4o$5b3o19b2ob o3bo$6b2o19bob3obo$7bo20b6o$5bobobo4b3o13b3o$4bobob2o12bobo$4bobo6bobo bo5b2o$5b2o4b3obob3o3bo$10bo5bo3bo$9bobob2o2b2obo$9bob2o2b2o2bo$8b2o4b o2b2o9bobo$6bo2bobobo2bo12b2o$6b2o2b2ob4o12bo$12bo$12bobo$13b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 24 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 12 HEIGHT 372 ]]
A smaller p24 gun based on dueling banjos.
(click above to open LifeViewer)
RLE: here Plaintext: here
x = 71, y = 67, rule = B3/S23 10b2ob2o15b2ob2o$10b2obo4b2o5b2o4bob2o$13bo2bo3b2ob2o3bo2bo$13b2obo11b ob2o6bo$16bo11bo8b3o$8bobo6bo3bobo3bo7b2o3bo$6b3ob3o5b3o3b3o8b3o2b2o$ 5bo7bo5bo5bo14bobo$6bob6o3b3o5b3o4b2o2b4ob3o$6b2o4bo4b3o5b3o4b2obo4bo 3bo$8bo3b2o4b2o5b2o4bobobob2obo3b2o$7bobo2bobo5bo3bo5b2o3bob2obobobo$ 8bo2bo6bo2bobo2bo4bo3bo4bob2o$11bo3bobo3bobo3bo4b3ob4o2b2o$11bo3bo2bo 2bobo2bo6bobo16bo3bo$11bo6b3o3b3o7b2o2b3o10bobobobo$11bo2bo20bo3b2o11b 2ob2o$12bo7bo15b3o$10bobobo5bo16bo$9bobob2o33b2o9b2o$9bobo6bo3bo7bo17b ob4ob4obo$10b2o4b3obob3o6bo17bo3bobo3bo$15bo3b2o4bo3b3o17bo3bobo3bo$ 15bob2o2b2obobo23b3o3b3o$16bo2b2o2b2obo$17b2o2b2obob2o$11b3o5bo2bobobo 2bo6bo$10b6o3b4ob2o2b2o7bo4bo2bo20bo2bo$10bob3obo6bo11b3o8bo23bo$9bo3b ob2o4bobo7b2o9bo3bo19bo3bo$9b4ob4o3b2o9b2o9b4o20b4o$7b2o4bob3o13bo$5b 2obob2obo2b2o$4b2o2bob2obob2o17b2o$4b3obo4b2o18b2o$4b4ob4o12b2o8bo$2o 3b2obo3bo13b2o25b2o$2o3bob3obo13bo26bobo$6b6o40bo$4o4b3o29b2o4b2o2b2ob 4o$o2bo35b2o5bo2bobo4bo$19b2o5b2o13bo6b2obob2o2b2o$20b2o5bo21bobo3b2o 2bo$10bo8bo5bo23bobob2o2b2obo$10b2o11b4o23bo4bo4bo$2b3o6b2o9bo4bo2b2o 14b2o3b3obob3o4b2o$3bobo4b2o9bob2ob2o2bo9b2o3b2o6b2ob2o6bobo$4b2o15bo 2bo3b2o2bo6bo2bo4bo13b2obobo$20b2obo2b2o2b5o3bobobo18bobobo$4b2o12bo4b obobobo5bobo2bob2o19bo$3bobo4b2o6bob2o2bo2bobob2ob2ob2obo3bo17b2o$2b3o 6b2o5bo3bobob2obob2obo5b2ob3o15b3o$10b2o8b2obobo3bo5bobobo3b3o15b3o$ 10bo10bobobo3bob3obo2b2o3b3o4bo5bo4b3o$21bo2bo5b2o2b2o7b3o3b3o3b3o3b3o 3bo$22b2o9bobo2bob2o2bo3bo2b2ob2o2bo3b2o2bobo$o2bo14b2o8b3ob2ob4obob2o 4b3o5b3o7bo2bo$4o3b2o10bo8bo2bo3bo3b2obo20bo$6bo3b9o10bobob2ob2o3bo2bo 18b6obo$2o4bobob7o2b3o6b2ob2obobob2obob2o17bo7bo$2o3b2ob2o2b4o2bo2bo 18bobo20b3ob3o$8bo2bo7b2o19bobo8b2ob2o9bobo$5b2obobobo28bo7b2obobob2o$ 6bo4bo32b2o3bo7bo3b2o$6bob3o33bo4b3o3b3o4bo$7b2o32b2obo17bob2o$41b2ob 2o15b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 6 WIDTH 480 HEIGHT 480 ]]
A p48 LWSS gun, using Rich's p16.
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

Period-20 glider gun

External links

References

  1. 1.0 1.1 Paul Callahan (February 11, 2001). "p24 "true" gun (mail digest)". Retrieved on March 17, 2016.
  2. Jason Summers (December 30, 2012). "Pattern Collections, jslife/osc". Retrieved on March 17, 2016.
  3. Tanner Jacobi (2016-07-05). "Re: Soup search results". ConwayLife.com forums. Retrieved on 2016-07-05.