44P12.3

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44P12.3
x = 14, y = 14, rule = B3/S23 7bo$6b2o$5b2o$4bo$3bob4o$2bobo4bo$b2obob2obo2b2o$2o2bob2obob2o$4bo4bob o$5b4obo$9bo$7b2o$6b2o$6bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 3 GPS 5 ZOOM 24 HEIGHT 500 WIDTH 500 ]]
Pattern type Oscillator
Number of cells 44
Bounding box 14 × 14
Period 12
Mod 12
Heat 38
Volatility 0.87
Strict volatility 0.87
Discovered by Nicolay Beluchenko
Year of discovery 2009

44P12.3 (or Eye of Sauron[1]) is a period-12 oscillator discovered by Nicolay Beluchenko on March 26, 2009.[2][3]

It is commonly used as a sparker, for example in some variants of p48 pi-heptomino hassler and pi orbital. On January 12, 2019, Tanner Jacobi used it along with dueling banjos, a heavyweight emulator variant, and pipsquirter 1 to build a period-24 glider gun which was then optimized by Matthias Merzenich the next day to be smaller than the previous record holder.[4][5]

Martin Grant found a 81-glider synthesis for this oscillator on January 5, 2015.[6] This was improved to 79 gliders by Matti Ward on February 17, 2018,[7] followed by 62 gliders in June 2019 due to incremental reductions by Jeremy Tan, BlinkerSpawn, Goldtiger997, and Luka Okanishi.[8][9] GUYTU6J reduced the synthesis further to 54 gliders in February 2020.[10]

References

  1. Jeremy Tan (June 10, 2019). Re: Synthesizing Oscillators (discussion thread) at the ConwayLife.com forums
  2. New Oscillators at Game of Life News. Posted by Heinrich Koenig on April 14, 2009.
  3. Jason Summers' pattern collections.
  4. Tanner Jacobi (January 12, 2019). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  5. Matthias Merzenich (January 13, 2019). Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums
  6. Martin Grant (January 5, 2015). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  7. Matti Ward (February 17, 2018). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  8. BlinkerSpawn (June 10, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  9. Luka Okanishi (June 14, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  10. GUYTU6J (February 26, 2020). Re: Soup-based syntheses (discussion thread) at the ConwayLife.com forums

External links

  • 44P12.3 at Heinrich Koenig's Game of Life Object Catalogs