AK-94

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AK-94
#C AK94 gun #C Mike Playle, 9 May 2013 #C http://conwaylife.com/wiki/AK-94 x = 38, y = 25, rule = B3/S23 15bo7b2o$15b3o5b2o$18bo$17b2o16b2o$30b2o2bo2bo$30bobo2b2o$19bo13b2o$5b o12bob2o12bo$5b3o10bo2bo12bob2o$8bo10b3o4bo4b2obo2bo$7b2o15bo2bo3b2ob 2o$25b2o3$2b2ob2o22b2o$o2bob2o22bo$2obo26b3o$3bo28bo$3b2o$b2o2bobo$o2b o2b2o$b2o16b2o$19bo10bo$13b2o5b3o8bo$13b2o7bo6b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 ZOOM 12 GPS 12 HEIGHT 480 ]]
Pattern type Gun
Number of cells 103
Bounding box 38 × 25
Period 94
Barrels 2
Discovered by Mike Playle
Year of discovery 2013

AK-94 is a 2-barrelled period-94 glider gun powered by the AK-47 reaction. The form shown to the right was completed by Mike Playle on May 9, 2013, who found additional stable catalysts with Bellman to eat the byproduct traffic lights.[1] Before discovery of these catalysts, removal of traffic lights required either multiple copies of the reaction as in P94S, or a special sparker as shown below.

x = 46, y = 25, rule = B3/S23 19bo7b2o$19b3o5b2o12b2o$22bo17bo2bo$21b2o16bo2bobo$39b2obobo$35b2o2b2o bob2o$23bo12b2o4bo$3b2o17bob2o9b2o3b3o$2bo2bo16bo2bo10b2obo3b2o$bobo2b o16b3o4bo6bob2obo2bo$bobob2o21bo2bo5bo5b2o$2obo5b2o18b2o6bo2b3o$3bobo 3bo25bo6bo$3b2o4bo26bo3bobob2o$b2o3bob2o26bo3bobobo$o2bob2obo30bob2obo $b2o3bobobo29bo2bo$3b3obo2bo30b2o$3bo2bobo$2obob6o$bobo3bo$bobo2bo16b 2o$2bo2bo17bo$3b2o12b2o5b3o$17b2o7bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 12 GPS 12 HEIGHT 480 WIDTH 640 ]]
A pseudo p94 gun with a period of 188, using a period-4 mod-2 domino sparker found by Paul Callahan on July 11, 1994[2]
(click above to open LifeViewer)
RLE: here Plaintext: here

A capped version of AK-94 is one of the honey farm shuttles, and it was the smallest known period-94 oscillator until the discovery of p94 R-pentomino hassler.

Glider synthesis

In July 2014 Martin Grant found a 60-glider synthesis for the one-barreled gun, which can be trivially turned into a two-barreled gun by removing two gliders.[3] On May 20, 2019, Jeremy Tan reduced this to 52 gliders for the one-barreled gun and 50 gliders for the two-barreled version.[4]

In other rules

In EightLife (B3/S238), the AK-94 has a slightly different evolutionary sequence from generation 34 to 37 that does not destroy the gun, so one can actually use AK-94 under this rule.

In Pedestrian Life (B38/S23), where traffic light predecessors die out naturally, there is no need for additional catalysts:

x = 12, y = 25, rule = B38/S23 2bo7b2o$2b3o5b2o$5bo$4b2o10$4bo$3bobo$2bo3bo$2bo3bo$2bo3bo$3bobo$4bo2$ 6b2o$6bo$2o5b3o$2o7bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBNAIL THUMBSIZE 2 ZOOM 10 ]]
Free-standing AK-94 in Pedestrian Life
(click above to open LifeViewer)

References

  1. Mike Playle (May 9, 2013). Re: What do you want out of (conway's) life this year? (discussion thread) at the ConwayLife.com forums
  2. Dean Hickerson's oscillator stamp collection. Retrieved on September 26, 2022.
  3. Martin Grant (July 11, 2014). Re: Scratch Your Heads: Glider Synthesis of Bellman One (discussion thread) at the ConwayLife.com forums
  4. Jeremy Tan (May 20, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums

External links