Noah's ark

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Noah's ark
10bobo2b$9bo5b$10bo2bob$12b3o6$bo13b$obo12b2$o2bo11b$2b2o11b$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 AUTOSTART OFF ]]
Pattern type Puffer
Number of cells 16
Bounding box 15×15
Direction Diagonal
Period 1344
Speed c/12
Discovered by Charles Corderman
Year of discovery 1971

Noah's ark is a diagonal puffer that was found by Charles Corderman in 1971.[1] It consists of two mutually stabilizing switch engines and is thus an ark. Its name comes from the variety of objects it leaves behind - in particular, every 1344 generations it produces 42 blocks, 40 blinkers, 22 beehives, eight loaves, four gliders, two boats, two block on tables, two long boats, two ships, and one beacon.

A 3-glider synthesis of a switch engine discovered by Luka Okanishi in March 2017 allowed for a 6-glider synthesis of Noah's ark.


The debris left behind every 1344 generations
x = 23, y = 23, rule = B3/S23 9bobo$10b2o$10bo6bo$16bo$16b3o$20b2o$20bobo$20bo2$o$b2o$2o5$3b2o$2bobo $4bo2$5b3o$5bo$6bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
6-glider synthesis of Noah's ark
(click above to open LifeViewer)
RLE: here Plaintext: here


  1. Robert Wainwright (December 1971). Lifeline, vol 4, page 3.

External links