T-nosed p4

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T-nosed p4
4b3o4b$5bo5b2$4b3o4b$3bo3bo3b$2bo5bo2b$2bobobobo2b$b2obobob2ob$o2b2ob 2o2bo$2o7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 0 0 GPS 2 THUMBSIZE 2 ]]
Pattern type Oscillator
Oscillator type T-nose
Number of cells 31
Bounding box 11×12
Period 4
Mod 4
Heat 15
Volatility 0.55
Strict volatility 0.49
Discovered by Robert Wainwright
Year of discovery 1989

T-nosed p4 is a period 4 oscillator that was found in October 1989 by Robert Wainwright. It can be used as a filter that deletes every other lightweight spaceship in a stream of period 4n + 2.[1]

A variant based on the overweight emulator is shown below.

x = 17, y = 12, rule = B3/S23 2$7b3o2$6bo3bo$2b2obo5bob2o$2bo11bo$3b2o7b2o$3o2b7o2b3o$o2bo9bo2bo$b2o 5bo5b2o$7b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 2 LOOP 4 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 16 HEIGHT 320 ]]
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RLE: here Plaintext: here

See also

References

  1. "Filter". The Life Lexicon. Stephen Silver. Retrieved on March 15, 2009.

External links

  • 31P4.1 at Heinrich Koenig's Game of Life Object Catalogs