Gliderless gun

A gliderless gun is a spaceship gun that doesn't involve gliders. The most famous example is the period-44 MWSS gun, based on a glider gun by David Buckingham (see P44 pi-heptomino hassler). Additionally, Dietrich Leithner created many gliderless spaceship guns, particularly those based on the twin bees shuttle.

There is no strict definition for what constitutes a gliderless gun. For example, solutions based on Herschel tracks may produce gliders, even though they aren't utilised in the reaction. Some increasingly strict conditions might include:

• a synthesis of the output spaceship that is not a form of glider synthesis
• a core gun engine that does not output gliders
• the absence of any reactions from the gun that would output gliders
• the absence of a glider-shaped cluster at any point in the operation of the gun
• the absence of a glider-shaped polyplet at any point in the operation of the gun
• the absence of any pattern which evolves into the glider within a few generations

Below is a LWSS gun that fits all of the above criteria.

x = 40, y = 42, rule = B3/S23 23b2o$23bo$17b2ob2obo$15bo2bobobo$15b2o4bo13bo$33b3o$32bo$32b2o2$12b2o $11bobo5b2ob2o7b2o$10bo7b2o3b2o6b2o$9bo9b2ob2o$9b2o9b3o$21bo$3b2o$4bo$ 2bo$2b2o2$2b2o7bobo2bobo11bo2bo$2bobo6bo2bo3bo15bo$3bo5b2o3bobobo11bo 3bo$3o7b3obo16b4o$o6b2o5b2o$7b2o4b2o$7b2o3bo$7b2obobo$7b2obobo2$24b3o 8b2o$10b2o12bobo8b2o$6b2o2b2o5b2o5bobo$5bobo8bobo$5bo10bo19b2o$4b2o9b 2o19bo$37b3o$19b2o4bo13bo$19bo2bobobo$21b2ob2obo$27bo$27b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 Z 10 HEIGHT 480 GPS 10 AUTOSTART LOOP 46 ]]

A gun that fits all of the above criteria (click above to open LifeViewer) RLE: here Plaintext: here

External links

• Gliderless at the Life Lexicon