p5 quinti-Snark
| p5 quinti-Snark | |||||||||
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| Pattern type | Reflector Oscillator | ||||||||
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| Number of cells | 87 | ||||||||
| Bounding box | 22 × 39 | ||||||||
| Angle | 180° | ||||||||
| Period | 5 | ||||||||
| Heat | Unknown | ||||||||
| Period multiplier | 5× | ||||||||
| Colour | Colour-changing | ||||||||
| Discovered by | Tanner Jacobi | ||||||||
| Year of discovery | 2018 | ||||||||
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p5 quinti-Snark is a period-quintupling 180-degree glider reflector discovered by Tanner Jacobi on October 30, 2018.[1] It consists of a heavyweight volcano, two independent eater 1s, an eater1-with-beehive constellation as in RNE-19T84, and another bait that may be a block, beehive, honeybit, depending on the number of inputs. Removing the leftmost eater 1 leaves another beehive that makes the device a 6× period multiplier, but this can otherwise be achieved by chaining a semi-Snark to a tremi-Snark or using filters.
Even though it contains a period-5 oscillator, it can quintuple the period of glider streams of any (sufficiently large) period; the oscillator is only involved in processing every fifth glider. This makes the reflector more versatile than quinti-Snarks of other periods. The lowest "safe" period of an uninterrupted periodic input glider stream is 55, due to the glider-emitting block → HF predecessor stage.
Different choices of period-5 sparker are useful for fitting this into different geometries, as exemplified by various period-5N guns in Catagolue's glider gun collection (direct link). The following is an alternative p5 sparker that reduces the height by 6 cells and shifts the horizontal bounding box to be one less in one direction and one more in the other.
| An alternative p5 sparker (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here |
References
- ↑ Tanner Jacobi (October 30, 2018). Re: Execution of Old Guns by Variable-Speed Firing Squad (discussion thread) at the ConwayLife.com forums
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