p4-assisted period-28 glider gun

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p4-assisted period-28 glider gun
x = 35, y = 23, rule = B3/S23 6b2o8b2o$4bo2bo8b2o$4b2obob2o$5bobo2bo$2b3o2bo17b2o2b2o$bo23bobo2bo$bo b2obobo13b2obob2o$2obo4b2o12bo2bobo3bo$bobo5bo15bo2b4o$bob2obo2bo$2obo 5bo6b3o5bobob2o$3bo4b2o4b2ob2o4b2o4bo$3b2obobo5b3o6bo5bobo$23bo6b2o$b 4o2bo15bo$bo3bobo2bo12b2o2bo2b2o$4b2obob2o10b3ob2o4bo$4bo2bo23bob2o$6b 2o19b3obo2bo$12b2o12bo2bob2o$13bo12b2obo$10b3o16bo$10bo18b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 12 AUTOSTART GPS 7 LOOP 28 ]]
Pattern type Gun
Number of cells 157
Bounding box 35×23
Period 28
Barrels 1
Discovered by James Pascua
iNoMed
Year of discovery 2022

The p4-assisted period-28 glider gun was found by James Pascua on February 14, 2022.[1] It is the current smallest p28 glider gun, beating out the original design from 2020, and is also the fifth-smallest known gun overall with a unique period as of June 2022.[2] Although its optimal bounding box (35×23[3]) requires it to have only one barrel, the mechanism is rotationally symmetric and can be reconfigured to have two barrels, as shown below.

Gallery

x = 37, y = 23, rule = B3/S23 4b2o18bo$5bo16b3o$5bob2o12bo$2b2obo2bo12b2o$o2bob3o19b2o2b2o$2obo23bob o2bo$3bo4b2ob3o10b2obob2o$3b2o2bo2b2o12bo2bobo3bo$11bo15bo2b4o$3b2o6bo $3bobo5bo6b3o5bobob2o$5bo4b2o4b2ob2o4b2o4bo$5b2obobo5b3o6bo5bobo$25bo 6b2o$3b4o2bo15bo$3bo3bobo2bo12b2o2bo2b2o$6b2obob2o10b3ob2o4bo$4bo2bobo 23bob2o$4b2o2b2o19b3obo2bo$14b2o12bo2bob2o$15bo12b2obo$12b3o16bo$12bo 18b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 6 ]]
Two-barreled version (37×23)
(click above to open LifeViewer)
RLE: here Plaintext: here
x = 34, y = 28, rule = B3/S23 6b2o8b2o$4bo2bo8b2o$4b2obob2o$5bobo2bo13b2o$2b3o2bo17bo3b2o$bo23bobo2b o$bob2obobo13b2obob2o$2obo4b2o12bo2bobo3bo$bobo5bo15bo2b4o$bob2obo2bo$ 2obo5bo6b3o5bobob2o$3bo4b2o4b2ob2o4b2o4bo$3b2obobo5b3o6bo5bobo$23bo6b 2o$b4o2bo15bo$bo3bobo2bo12b2o2bo$4b2obob2o10b3ob2o$4bo2bo$6b2o9bobo7b 3o$12b2o4b2o6bo$13bo4bo7b2o3bo$10b3o16b2obo$10bo21bo$32b2o$15b4o$10b2o 7bo$10b2o2b2o3bo$14b2o2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 6 ]]
Smallest known period-56 glider gun,
using a blocker as a filter[4] (34×29)
(click above to open LifeViewer)
RLE: here Plaintext: here
x = 110, y = 84, rule = B3/S23 27b2o3b2o4b2o$27bo4bo6bo15b2o36b2o$20bo7b3obo6bobo13bobo22b3o11bo5bobo $20bo2bo6bobob2o4b2o2b2o35b2o9bobob2obob2o2bo$15b2o3bo2bo7bob2o10bo33b o2b2o2bobob5o2bobo3b3o$15bo4bo3bo5b2o4bo6b2o19b2o13b2o3bobo8bobo2b2o$ 16b2o2bo2bo2b3o2b6o6b3o3bo7b2o5bo2bo16bo4bo5bob2obob2o$18b2o4b7o14b2ob 2o11b2obob2o11b2o12bo2bobo5bo$16b2ob2o11bobo10b2o14b2obobo3bo9bo9bo7bo 2b2obo$15bo2bobo12b2o4b2o7b2o15bob4o9bobo7b2o6bo3b3ob2o$15b2o2bo19bobo 5b3o2b2o3bo6bobo14b2o6b2obo5bob2o4bo$37bobo2bo5b2obo2bobobo3b3o2b2o19b 5o8bo3bo2bo$26bo3bo6b2obobo3b3o2bo7bo2b3o3bo32bobo2b3o$27b3obo8bob2o2b 3o3bobobo2bob2o5bobo12bobo16bob2o$22bo5bo4bobo4bo3bobo6bo3b2o2b3o5b2o 12b2o18bo2bo$5b2o11b3obo5bobo4bo5b3obo15b2o21bo3b5o12b2o$6bo11b4o8bo4b o8bobob2o14b2o3b2o17bob2o$4bo17b3o2bob3o2bo8b2obob2o6bo4b2ob2o4bo18b2o 7b2o$4b5ob2o3b2o5b2o4bo3bo10bo2bo7bobo4bo3b3o2bob2o16bo7bo$bo6bobo4bo 29b2o8b2o9b3obo2bo10b2obo6b2o3b3o$b6o4b3obo35b2o12bo2bob2o4bobo5b2o5bo 2b2o5bo$13bobob2o5b2o7b3o6bo9bo12b2obo7b2o7bo2bo4bo$3bo10bo2bo6bobo13b obo6b3o16bo8bo6bob2ob2ob6o$3b2o3bo10bobo6b5o8b2o6bo18b2o11b2o3bo10bo$ 6bob2ob2ob6ob7o2b4o29bo17bo10bo2bo$7bo2bo4bo11b2o3b3o2b2o22bobo27bobob 2o$6b2o5bo2b2o5b3obo10bo23b2o15b6o4b3obo$6b2obo6b2o4bobobobo7b2o31bo2b obo4bo6bobo5b3o$10bo11bo3bob3o5b3o10bo19bo12b5ob2o6bo$20bobo3bo4bo6b2o 7bobo19b2o11bo4bo3bo$11b3o6b2o3b2o3b2o6bo9b2o19bobobo10bobo2b3o$10bo3b o24b3o28bo12b2ob3o$9bo5bo25bo26bobo18bo6b2o3b2o$b2o6bo5bo53b2o17b2o6bo 4bo2b2o$b2o6bo5bo65bo15b3obo3bo$10bo3bo41bo23b2o8b3o6bobobo$11b3o6bobo 31bobo23bobo6bo10bo2b2o$21b2o32b2o18bo13b2o3bo10bo$14bo6bo53b3o14bob2o b2ob6o$7b2o6bob2o59bo14bo2bo4bo$7b2o2bo5b2o56b2obo13b2o5bo2b2o$9bo4bo 2bo50bobo4bobob2o7bo3b2obo6b2o$5b6ob2ob2obo44bo7bo5bo3bo5b2o7bo$5bo10b o3b2o5bobo31bobo7bo4b2o2b2o5bobo$7bo2bo10bo6b2o32b2o4bo2bo3b3o$6b2obob o16bo40b3o3b3o2b4o16b3o$9bob3o4b6o51b3o2bo2bo9bob2obo4bo4b2o$9bo4bobo 6bo51b2obo2bobob2o6bo3bobo3bo4b2o$8b2o3b2ob5o14b2o12b2o12b2o11b3ob2o2b o2bo5bo4bob2obo$20bo12b2ob2o9b2ob2o9b2ob2o4bo5b2o4bobo2bo6b3o$18bo14b 4o10b4o10b4o3bobo7bob2o2bob2ob2o$18b2o14b2o12b2o12b2o5b2o9b2o2bo3bobo$ 73bo7b2obo3bo11bo$23b3o38bo9bo4b3o2bobobo4b2o11b2o$25bo15bo15b2ob2o3bo 6b3o4b2o3bob2o5b2o2bo5bo2b2o$24bo16b3o10bobobobo5bo17bo10bo4bo4bo$44bo 7b3obobo2b3obob2o8bo4bo3b2o3b6ob2ob2ob6o$33b3o7b2o6bo4bob3o5b2obo5bobo 5b2obobo2bo17bo$7b2o18b2o4bo18b3obo4b4o4bo6b2o7bo2bo4bo2bo7bo2bo$4b2o 2b3o16bo6bo11b2o6bobob3o3b5o11bo4bobo4b2obobo2bo2bobob2o$3bob2o4bo4b3o 5b2obo16bob2o7bob2o2b2o18bo4bo8bob7obo$3bo6b2o6bo5b2obob2o13b2ob3o6bo 3bo2b4o12b3o13bo9bo$2ob4o10bo8b2obo2bo15b2o3b3ob4o2bo2bo29b6o3b2o$obo 4bo12bo8bob2o18bob2o29bo13bo2bo$2bo2b3o12bo3bo4bo10b3o5bob5o2b2o5bo17b obo$2b2o2bo13bo2b2o3b2o10bo6b2ob3o4b2o3b3o18b2o$2o3b3o14b3o16bo19bo25b o$bo4b2o5b3o6b2o4b2o31b2o25bo$bob2obo5bob2o6b2o3bobo28bo27b3o$2bobobo 5bo3bo5bo4bo22b2o2bo4b2o7b2o$4b3o6b2obo5bobob2o21b2obob2o4bo5bo2bo21bo $4b3o6b3o7b3o21b2o3bobo3b3o4bob2o20bobo$2b2ob2o14bobo2b4o17bo3b2obob2o 6bobo2b3o18b2o$2b2o2bo13bo2bobo3bo18bo3bo2b2o7bo3bo2bo22bo$6bo13b2obob 2o17b2o15bob2o4bo25bo$2b4o17bo2bo16bobo15b2o4bob2o22b3o$2bo2b2o16b2o 18bo18b3ob2o$4bo2bo10b2o22b2o10b3obo4bobobo30bo$4o2b2o10bobo26bo4b5obo b2obob2o29bobo$o5bob2o10bo21b2o2bobobo2bobo2bobo2b2o32b2o$3b2obob2o10b 2o20bo7bobobob2o2bobo3b3o$3bo2bo37bob2o9bob2obob2o2bo$5b2o36b2o10bobo 5bobo$56b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 4 WIDTH 640 HEIGHT 480 ]]
Smallest known pseudo-p14 glider gun[5] (110×84)
(click above to open LifeViewer)
RLE: here Plaintext: here

References

  1. James Pascua (February 14, 2022). Re: Gun Discussion Thread (discussion thread) at the ConwayLife.com forums
  2. Adam P. Goucher. "synthesis-costs/gun". Catagolue. Retrieved on June 20, 2022.
  3. Carson Cheng (June 20, 2022). Re: Gun Discussion Thread (discussion thread) at the ConwayLife.com forums
  4. iNoMed (June 20, 2022). Message in #cgol on the Conwaylife Lounge Discord server
  5. iNoMed (June 20, 2022). Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums