Block-laying switch engine

The block-laying switch engine (or block-making switch engine) is a puffer that was found by Charles Corderman. It consists of a switch engine reacting with blocks to create an infinite number of new blocks (eight new blocks every 288 generations).

Block-laying switch engine
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>18bo10b$b3o8bo5bo10b$o3bo6bo7bo9b$b2o9b4o2b2o9b$3b2ob2o9b3o9b$5b2o11bo bo8b$19bo7b2o$19bo7b2o11$7b2o20b$7b2o20b7$15b2o12b$15b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ TRACK -1/12 -1/12 THUMBSIZE 2 HEIGHT 480 X 7 Y 5 Z 8 GPS 12 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
Pattern type Puffer
Number of cells 43
Bounding box 29×28
Frequency class 19.6
Direction Diagonal
Period 288
Speed c/12
Discovered by Charles Corderman
Year of discovery 1971

Because of its easy construction (see the predecessor below), it has appeared in some superlinear growth patterns including mosquito 1 and mosquito 2.[1]


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

The blocks left behind by the block-laying switch engine
A simple predecessor of the block-laying switch engine
RLE: here


  1. "Mosquito 1". The Life Lexicon. Stephen Silver. Retrieved on June 1, 2009.
  2. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
This article is issued from Conwaylife. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.