Blocker
| Blocker | |||||||||
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| Pattern type | Oscillator | ||||||||
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| Number of cells | 15 | ||||||||
| Bounding box | 10 × 5 | ||||||||
| Frequency class | 27.2 | ||||||||
| Period | 8 (mod: 4) | ||||||||
| Heat | 9 | ||||||||
| Volatility | 0.89 | 0.89 | ||||||||
| Kinetic symmetry | Unspecified | ||||||||
| Discovered by | Robert Wainwright | ||||||||
| Year of discovery | Unknown | ||||||||
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Blocker is a period-8 oscillator found by Robert Wainwright.[1] It is a useful dot sparker consisting of two blocks hassling an unnamed object which is a dying spark. It reappears halfway through its cycle rotated 180°.
Blockers can also be infinitely connected by "sharing" blocks, as long as adjacent reactions are no more than one phase apart. They can also be connected with Coe's p8, which uses blocks as hasslers in a similar manner.
A blocker can double the period of a glider stream that is a multiple of 4 but not 8 by deleting every second glider.
| Blockers sharing blocks (click above to open LifeViewer) RLE: here Plaintext: here |
Commonness
- Main article: List of common oscillators
Blocker is about the sixteenth most common naturally-occurring oscillator in Achim Flammenkamp's census, being less common than mazing but more common than jam.[2] On Catagolue, it is the second most common period 8 oscillator, being less common than the figure eight but more common than Coe's p8.[3]
The first natural blocker stator variant, blocker on cap, occurred in September 2015.[4]
Glider synthesis
All strict still lifes with a population of 23 or fewer cells, all oscillators with 16 or fewer cells, and all spaceships with 35 or fewer cells are known to be glider-constructible. A glider synthesis of this object can be found in the infobox to the right.
See also
References
- ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
- ↑ Billabob (September 9, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
- Blocker at the Life Lexicon
- Blocker at Adam P. Goucher's Catagolue
- 15P8.1 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 27
- Natural periodic objects
- Oscillators with 15 cells
- Periodic objects with minimum population 15
- Patterns with 15 cells
- Patterns found by Robert Wainwright
- Patterns that can be constructed with 5 gliders
- Oscillators
- Oscillators with period 8
- Oscillators with mod 4
- Oscillators with heat 9
- Oscillators with volatility 0.89
- Oscillators with strict volatility 0.89
- Non-flipping oscillators that turn 180 degrees
- Sparkers
- Sparkers with period 8
- Dot sparkers
- Strong sparkers