Karel's p15

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Karel's p15
x = 10, y = 11, rule = B3/S23 2bo4bo$2b6o$2bo4bo4$2b6o$bo6bo$o8bo$bo6bo$2b6o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 3 ZOOM 14 LOOP 15 ]]
Pattern type Oscillator
Number of cells 28
Bounding box 16×14
Period 15
Mod 15
Heat 34.9
Volatility 1.00
Strict volatility 1.00
Discovered by Karel Suhajda
Year of discovery 2002

Karel's p15 is a period-15 oscillator discovered by Karel Suhajda on December 11, 2002.[1] It consists of a period 15 rotor supported by the domino spark of a pentadecathlon. A pentadecathlon can support 2 Karel's p15s. It provides accessible sparks that can be used to perturb reactions. The p15 bouncer mechanism is an example. In the same month of its discovery, Mark Niemiec found an 18-glider synthesis of this oscillator.[2]

This oscillator first appeared semi-naturally in March 2015.[3]

Image gallery

Period 435 gun shows how this pattern thins out the glider stream and triples the period.

See also


  1. Jason Summers' all-osc pattern collection.
  2. Jason Summers' jslife pattern collection.
  3. Dongook Lee (March 15, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums

External links

  • 28P15.3 at Heinrich Koenig's Game of Life Object Catalogs