Achim's p144

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Achim's p144
x = 28, y = 19, rule = B3/S23 2o24b2o$2o24b2o$18b2o$17bo2bo$18b2o$14bo$13bobo$12bo3bo$12bo2bo2$12bo 2bo$11bo3bo$12bobo$13bo$8b2o$7bo2bo$8b2o$2o24b2o$2o24b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 144 GPS 24 THUMBSIZE 2 ]]
Pattern type Oscillator
Number of cells 42
Bounding box 30 × 19
Period 144
Mod 72
Heat 31.9
Volatility 1.00
Strict volatility 0.95
Discovered by Achim Flammenkamp
Dean Hickerson
David Bell
Year of discovery 1994

Achim's p144 is a period-144 oscillator that was found (minus all the blocks) on a cylinder of width 22 by Achim Flammenkamp on July 21, 1994. Dean Hickerson reduced it to a finite form using figure eights the same day. The neater finite form shown here - replacing the figure eights with blocks - was found by David Bell on August 8, 1994.[1]

It first appeared semi-naturally on May 2, 2019, in a symmetric soup submitted to Catagolue by carybe.[2]

Ian07 reduced the glider synthesis of this oscillator to 13 gliders in December, 2019.[3] This was reduced further to 11 gliders with wwei23's observations on February 28, 2021.[4]

See factory for a use of this oscillator.

On October 16, 2021, iNoMed found a new "production line"[5] variant of this oscillator which can be used as a powerful active-region factory,[6][7] as well as to reduce several glider guns with period 144n.[8]

See also


  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. Ian07 (May 26, 2019). Re: Soup search results (discussion thread) at the forums
  3. Ian07 (December 25, 2019). Re: Synthesising Oscillators (discussion thread) at the forums
  4. GUYTU6J (February 28, 2021). Re: Thread For Your Useless Discoveries (discussion thread) at the forums
  5. iNoMed (October 16, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  6. iNoMed (October 16, 2021). Re: Oscillator Discussion Thread (discussion thread) at the forums
  7. dani (October 16, 2021). Message in #cgol on the Conwaylife Lounge Discord server
  8. iNoMed (October 17, 2021). Re: Gun Discussion Thread (discussion thread) at the forums

External links