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#N Simkin's glider gun
#O Michael Simkin
#C A true period 120 glider gun, found on April 28, 2015.
#C www.conwaylife.com/wiki/Simkin%27s_glider_gun
x = 33, y = 21, rule = B3/S23
2o5b2o$2o5b2o2$4b2o$4b2o5$22b2ob2o$21bo5bo$21bo6bo2b2o$21b3o3bo3b2o$
26bo4$20b2o$20bo$21b3o$23bo!Code: Select all
x = 8, y = 5, rule = B38/S23
3b2o$2ob2o$2o3b2o$5bobo$5b3o!Well, ditching the eater leaves a 29-cell gun with a 22-cell predecessor:However he could also have meant the opinion: "the double diamond is the smallest possible gun (by number of cells)."
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x = 33, y = 14, rule = B3/S23
o6bo$2o5b2o2$4bo$4b2o4$27bo$22bo4b2o$21bo$20b2o9bo$21b2o8b2o$22bo!
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x = 5, y = 36, rule = B3/S23
o$2o5$o$obo$2o3$2o$obo$b2o9$3b2o$2bobo$bo2bo2$bo$2o$2bo6$2b2o$3bo!Code: Select all
x = 33, y = 20, rule = B3/S23
2o5b2o$2o5b2o2$4b2o$4b2o5$22b2ob2o$21bo5bo$21bo6bo2b2o$21b3o3bo3b2o$
26bo5$24bob2o$24b2obo!
Wow! I think the LifeWiki article should mention this variation. Even as a pseudo-period gun this still officially beats out the GGG as the smallest single-barrelled glider gun.The Turtle wrote: Here is a trivial reduction of Simkin's Glider Gun to 35 cells.
This was mentioned right away as the "standard form" because it has the smallest bounding box. Sorry to steal any thunder.The Turtle wrote:Here is a trivial reduction of Simkin's Glider Gun to 35 cells. I couldn't find this anywhere else.The glider stream has period is 120, and the gun has period 240.Code: Select all
x = 33, y = 20, rule = B3/S23 2o5b2o$2o5b2o2$4b2o$4b2o5$22b2ob2o$21bo5bo$21bo6bo2b2o$21b3o3bo3b2o$ 26bo5$24bob2o$24b2obo!
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x = 38, y = 49, rule = B3/S23
3b2o4bo$3b2o4b3o$12bo$11b2o2$b2o2$13b3o$12b2ob2o$12b2ob2o$2o3b2o5b5o$b5o5b2o3b2o$b2ob2o$b2ob2o$2b3o2$12b2o2$6bo$5bobo$4bob2o$3b2ob2o23bo2bo$4bob2o27bo$5bobo23bo3bo$6bo25b4o5$5b2o5b2o$5b2o5b2o$12bo2$10bo3b2o$13bo2bo$13bo3bo$13bo$10bo5bo15b2o$11b2o2bo16b2o$14bo5bo$18bobo8b2o5b2o$19b2o8b2o5b2o6$29bob2o$29b2obo!