Glider-producing switch engine

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Glider-producing switch engine
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Pattern type Puffer
Number of cells 123
Bounding box 67 × 60
Frequency class 21.0
Direction Diagonal
Period 384
Speed c/12
Discovered by Charles Corderman
Year of discovery 1971

The glider-producing switch engine (or glider-making switch engine) is a puffer that was found by Charles Corderman in the early 1970s.[1] It consists of a switch engine reacting with blocks to produce various still lifes, several blinkers, and a glider every 384 generations.

Because of its easy construction (see its predecessors below), it has appeared in some superlinear growth patterns including mosquito 3.

Commonness

The glider-producing switch engine is the second most common naturally-occurring pattern that exhibits infinite growth, the most common being the block-laying switch engine. It is also the ninety-first most common object on Adam P. Goucher's Catagolue.[2]

Time bomb

The time bomb is a 17-cell pattern found by Douglas G. Petrie that evolves into a glider-producing switch engine.[3][4]

Synthesis

Although a clean synthesis of the glider-producing switch engine requires 4 gliders, Michael Simkin found a 3-glider collision in October 2014 which includes the puffer in its ash.[5] This collision has the minimum number of gliders necessary to exhibit infinite growth, and is the only known 3-glider collision to do so.

bo11b2o$obo4bo6bo$7bo4bo2b$2bo2bo3bo2bo2b$2b2o6bo4b$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
Time bomb

(click above to open LifeViewer)
RLE: here Plaintext: here
x = 28, y = 6, rule = B3/S23 bobo$o$bo2bo$3b3o$26b2o$26b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
Another simple predecessor of the glider-producing switch engine

(click above to open LifeViewer)
RLE: here Plaintext: here
The debris left behind by the glider-producing switch engine


References

  1. ↑ Robert Wainwright (December 1971). Lifeline, vol 4, page 2.
  2. ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
  3. ↑ Robert Wainwright (June 1973). Lifeline, vol 10, page 3.
  4. ↑ "Time bomb". The Life Lexicon. Stephen Silver. Retrieved on May 16, 2009.
  5. ↑ Michael Simkin (October 24, 2014). Re: Making switch-engines (discussion thread) at the ConwayLife.com forums
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