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x = 13, y = 11, rule = B3/S23 4bo3bo$o2bobobobo2bo$obo2bobo2bobo$bo2b2ob2o2bo$5bobo$2b2o5b2o$2bo7bo$ 4bo3bo2$bo2bo3bo2bo$2b2o5b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 27 GPS 3 LOOP 7 HEIGHT 480 WIDTH 480 ]]
Pattern type Oscillator
Number of cells 38
Bounding box 15×11
Period 7
Mod 7
Heat 23.4
Volatility 0.82
Strict volatility 0.82
Discovered by Nicolay Beluchenko
Year of discovery 2009

38P7.2 is an unnamed period-7 oscillator discovered by Nicolay Beluchenko on February 17, 2009.[1] It provides six sparks in generation 4 that are useful in creating p7 bumper as well as non-trivial oscillators of higher periods such as snacker on 38P7.2. A variation of this oscillator can be created by displacing one half of the oscillator by two cells.

It first appeared semi-naturally in March 2016.[2] gmc_nxtman found an 18-glider synthesis of this oscillator on August 13, 2017.[3] Goldtiger997 improved this to 14 gliders on February 12, 2018.[4]

In March 2018, Josh Ball found a pattern that can be stabilized by copies of 38P7.2 without blocks.[5]

Image gallery

An alternate form of this oscillator
RLE: here

See also


  1. Jason Summers' all-osc pattern collection.
  2. Adam P. Goucher (March 19, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  3. gmc_nxtman (August 13, 2017). Re: Soup Search Results (discussion thread) at the ConwayLife.com forums
  4. Goldtiger997 (February 12, 2018). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. Josh Ball (March 27, 2018). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums

External links

  • 38P7.2 at Heinrich Koenig's Game of Life Object Catalogs