Fore and back
| Fore and back | |||||||||
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| Pattern type | Oscillator | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Oscillator type | Billiard table | ||||||||
| Number of cells | 24 | ||||||||
| Bounding box | 7 × 7 | ||||||||
| Frequency class | 30.6 | ||||||||
| Period | 2 | ||||||||
| Mod | 1 | ||||||||
| Heat | 4 | ||||||||
| Volatility | 0.15 | ||||||||
| Strict volatility | 0.15 | ||||||||
| Rotor type | Pole 2 | ||||||||
| Discovered by | Achim Flammenkamp | ||||||||
| Year of discovery | 1994 | ||||||||
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Fore and back (or complementary blinker [1]) is a period 2 oscillator that was found by Achim Flammenkamp in July 1994. Its rotor is the same as the blinker.
Commonness
Fore and back is about the thirty-eighth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than boat on spark coil and griddle and block, about as common as 21P2, and more common than trans-block and long hook eating tub and trans-beacon down and long hook.[2]
Synthesis
In August, 2013 a 24-glider synthesis of this oscillator was found by Martin Grant, based on a soup, provided by Lewis Patterson. Several days later Mark Niemiec improved this result, having found a 20-glider synthesis.[3]
In October 2014, Tanner Jacobi found a predecessor for this pattern based on a soup from Adam P. Goucher's apgsearch script, which was eventually optimized to a 6-glider synthesis[4] in November.
See also
References
- ↑ "Complementary blinker". The Life Lexicon. Stephen Silver. Retrieved on December 3, 2018.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ "Synthesising Oscillators". Retrieved on September 10, 2013.
- ↑ "Soup search results". Retrieved on November 9, 2014.
External links
- Fore and back at the Life Lexicon
- 24P2.142 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 30
- Natural periodic objects
- Oscillators with 24 cells
- Periodic objects with minimum population 24
- Patterns with 24 cells
- Patterns found by Achim Flammenkamp
- Patterns found in 1994
- Patterns that can be constructed with 6 gliders
- Oscillators
- Billiard tables
- Oscillators with period 2
- Oscillators with mod 1
- Oscillators with heat 4
- Oscillators with volatility 0.15
- Oscillators with strict volatility 0.15
- Oscillators with rotor Pole 2
- Patterns with 180-degree rotation symmetry
- Flipping oscillators