Block on griddle

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Block on griddle
x = 6, y = 7, rule = B3/S23 3bo$bobo$o4bo$6o2$2b2o$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 THUMBSIZE 2 ]]
Pattern type Oscillator
Family Griddle
Number of cells 15
Bounding box 6×7
Frequency class 30.0
Period 2
Mod 1
Heat 6
Volatility 0.33
Strict volatility 0.33
Rotor type Flutter
Discovered by Robert Wainwright
Year of discovery 1972

Block on griddle (or singular flip flop) is a period-2 oscillator that was discovered by Robert Wainwright in July 1972.[1]


Block on griddle is about the thirty-sixth most common naturally-occurring oscillator in Achim Flammenkamp's census, being slightly less common than the cis-beacon down on long bookend, approximately as common as the boat on spark coil, and more common than fore and back and xp2_8e1t2gozw23.[2] It is the 32nd most common oscillator on Adam P. Goucher's Catagolue.

It is the most common griddle oscillator, being about 5 1/2 times more common than second place, beehive on griddle.

Glider synthesis

In October 2014, Ivan Fomichev found a 6-glider synthesis for this pattern based on a soup from Adam P. Goucher's apgsearch script.[3] A 5-glider synthesis was found in July 2020.[4]

See also


  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  3. "Soup search results". Retrieved on November 9, 2014.
  4. Ian07 (July 18, 2020). Re: Randomly enumerating glider syntheses (discussion thread) at the forums

External links

  • 15P2.28 at Heinrich Koenig's Game of Life Object Catalogs