Achim's p8

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Achim's p8
x = 9, y = 9, rule = B3/S23 b2o$o$bo3bo$bo3b2o$3bobo$2b2o3bo$3bo3bo$8bo$6b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 8 GPS 4 THUMBSIZE 2 ]]
Pattern type Oscillator
Number of cells 18
Bounding box 9 × 9
Frequency class 43.5
Period 8
Mod 4
Heat 14
Volatility 0.90
Strict volatility 0.70
Discovered by Achim Flammenkamp
Year of discovery 1994

Achim's p8 is a period-8 oscillator discovered by Achim Flammenkamp on July 20, 1994.[1]

Synthesis

In August 2004 Jason Summers and Mark Niemiec found a 13-glider synthesis of this oscillator.[2] On July 8, 2017, gmc_nxtman reduced the cost to 9 gliders.[3] Chris857 further reduced the cost to 8 gliders on December 31, 2022,[4] with iNoMed posting an alternate 8G synth the same day.[5]

Commonness

On Catagolue, it is the fifth most common period 8 oscillator, being slightly less common than smiley.[6] It first occurred naturally on August 21, 2015, in a soup submitted to Catagolue by Tanner Jacobi.[7]

See also

References

  1. Dean Hickerson's oscillator stamp collection.
  2. Jason Summers' jslife pattern collection.
  3. gmc_nxtman (July 8, 2017). Re: Thread for your unsure discoveries (discussion thread) at the ConwayLife.com forums
  4. Chris857 (December 31, 2022). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. iNoMed (December 31, 2022). Message in #cgol on the Conwaylife Lounge Discord server
  6. Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
  7. gameoflifeboy (August 21, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums

External links