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
Direction Diagonal
Period 384
Speed c/12
Discovered by Charles Corderman
Year of discovery Unknown

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

It is the second most common naturally-occurring pattern that exhibits infinite growth, and is one of only two patterns that exhibits infinite growth that has been known to occur naturally (the other being the block-laying switch engine).

Because of its easy construction (see its predecessors below), it has appeared in some superlinear growth patterns including mosquito 3.[1]

Time bomb

The time bomb (shown below) is a 17-cell pattern that was found by Doug Petrie that evolves into a glider-producing switch engine.[2]

Image gallery

The debris left behind by the glider-producing switch engine
The time bomb is a predecessor of the glider-producing switch engine
RLE: here
Another simple predecessor of the glider-producing switch engine
Download RLE: click here


  1. Stephen Silver. "Mosquito 3". The Life Lexicon. Retrieved on June 1, 2009.
  2. Stephen Silver. "Time bomb". The Life Lexicon. Retrieved on May 16, 2009.

External links