Dueling banjos

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Dueling banjos
x = 20, y = 25, rule = B3/S23 16b2o$16b2o2$16b4o$2o14bo2bo$bo$bobo$2b2o5bo$8b2o$7b2o6b3o$8b2o4bobo$ 14b2o2$14b2o$8b2o4bobo$7b2o6b3o$8b2o$2b2o5bo$bobo$bo$2o14bo2bo$16b4o2$ 16b2o$16b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ AUTOSTART GPS 12 LOOP 24 THUMBSIZE 3 ZOOM 16 HEIGHT 480 ]]
Pattern type Oscillator
Number of cells 62
Bounding box 25×20
Period 24
Mod 24
Heat 33
Volatility 0.86
Strict volatility 0.86
Discovered by Apple Bottom
Year of discovery 2019

Dueling banjos is a period-24 oscillator found (in tetramer form, via apgsearch) by Apple Bottom on January 10, 2019.

Matthias Merzenich provided a monomer form,[1]. Starting from an initial p24 gun by Tanner Jacobi,[2] he found a way to adjust the sparkers to produce a true period gun slightly smaller than the previous record-holder, p24 gun.[3]

x = 40, y = 31, rule = B3/S23 5b2ob2o15b2ob2o$5b2obo17bob2o$8bo5bo5bo5bo$8b2o4b2o3b2o4b2o$14bobobobo $3bobo9b2ob2o13b3o$b3ob3o24b6o$o7bo23bob3obo$2ob4obo22bo3bob2o$bo3bo 25b4ob4o$bobo2b2o4b2obo3bob2o6b2o4bob3o$2bobob2o5b3o3b3o5b2obob2obo2b 2o$3bob3o6bo5bo5b2o2bob2obob2o$5b3o18b3obo4b2o$5b3o18b4ob4o$5b3o19b2ob o3bo$6b2o19bob3obo$7bo20b6o$5bobobo4b3o13b3o$4bobob2o12bobo$4bobo6bobo bo5b2o$5b2o4b3obob3o3bo$10bo5bo3bo$9bobob2o2b2obo$9bob2o2b2o2bo$8b2o4b o2b2o9bobo$6bo2bobobo2bo12b2o$6b2o2b2ob4o12bo$12bo$12bobo$13b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 6 LOOP 2400 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 10 HEIGHT 400 ]]
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Mark Niemiec posted a 19-glider synthesis of the oscillator on January 13th.[4]

References

  1. Matthias Merzenich. Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  2. Matthias Merzenich. Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums
  3. Tanner Jacobi. Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  4. Mark D. Niemiec. Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums