Snark: Difference between revisions
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original Snark catalyst was 31 bits |
Copied RLE from RLE:Snarkcatalystvariants, looking for advice on how to standardize -- comments into caption, too, maybe? |
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|viewerconfig = #C [[ WIDTH 600 HEIGHT 600 X 3 Y -3 THUMBSIZE 2 ZOOM 20 GPS 30 LOOP 128 ]] | |viewerconfig = #C [[ WIDTH 600 HEIGHT 600 X 3 Y -3 THUMBSIZE 2 ZOOM 20 GPS 30 LOOP 128 ]] | ||
}} | }} | ||
The '''snark''' is a 90° [[Stable reflector|stable glider reflector]] discovered by [[Mike Playle]] in April 2013.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=7819#p7819|title=Just the place for a Snark!|author=Mike Playle|date=April 25, 2013|accessdate=March 27, 2016}}</ref> It is made up of two [[Eater_1|eaters]], a [[block]] and a 31-bit [[still life]], the heart of the Snark. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the [[population]] and the [[bounding box]]. Another commonly-used stabilization of the catalyst is 34 bits, and many other variants | The '''snark''' is a 90° [[Stable reflector|stable glider reflector]] discovered by [[Mike Playle]] in April 2013.<ref>{{cite web|url=http://conwaylife.com/forums/viewtopic.php?p=7819#p7819|title=Just the place for a Snark!|author=Mike Playle|date=April 25, 2013|accessdate=March 27, 2016}}</ref> It is made up of two [[Eater_1|eaters]], a [[block]] and a 31-bit [[still life]], the heart of the Snark. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the [[population]] and the [[bounding box]]. Another commonly-used stabilization of the catalyst is 34 bits, and many other variants are available. | ||
{{EmbedViewer | |||
|position = center | |||
|viewerconfig = #C [[ THEME 6 GRID GRIDMAJOR 0 ZOOM 8 HEIGHT 480 THUMBLAUNCH THUMBSIZE 2 ]] | |||
|rle = | |||
#C four Snark catalyst variants | |||
#C Top: original variant by Mike Playle | |||
#C Left: Shannon Omick (better clearance on a diagonal) | |||
#C Right: Heinrich Koenig (better clearance on a different diagonal) | |||
#C Bottom: Simon Ekstrom (better clearance on two diagonals) | |||
x = 51, y = 52, rule = B3/S23 | |||
20b2o$20bobo$22bo4b2o$18b4ob2o2bo2bo$18bo2bobobobob2o$21bobobobo$22b2o | |||
bobo$26bo2$12b2o$13bo7b2o$13bobo5b2o$14b2o25bo$39b3o$38bo$38b2o3$46b2o | |||
$24b2o21bo$24bo22bob2o$14b3o8b3o11b2o4b3o2bo$4bo11bo10bo11b2o3bo3b2o$ | |||
2b5o8bo5b2o21b4o$bo5bo13bo8b2o15bo$bo2b3o12bobo7bobo12b3o$2obo15b2o8bo | |||
13bo$o2b4o21b2o14b5o$b2o3bo3b2o11bo22bo2bo$3b3o4b2o11b3o22b2o$3bo22bo$ | |||
2obo21b2o$2ob2o3$11b2o$12bo$9b3o$9bo25b2o$28b2o5bobo$28b2o7bo$37b2o2$ | |||
24bo$23bobob2o4b2o$23bobobobo2bo2bo$22b2obobobo3b2o$23bo2b2ob4o$23bo4b | |||
o3bo$24b3obo2bo$26bobobo$29bo! | |||
}} | |||
The reaction was discovered by [[Dietrich Leithner]] about 1998, but it consumed another block.<ref>{{Cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=335#p1939|title=Re: Incomplete search patterns - try to complete|author=Adam P. Goucher|date=February 17, 2010|accessdate=May 8, 2013}}</ref> A [[catalyst]] that could replace the block was found with [[Bellman]], a program for searching catalytic reactions, developed by Mike Playle. | The base reaction was discovered by [[Dietrich Leithner]] about 1998, but it consumed another block.<ref>{{Cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=335#p1939|title=Re: Incomplete search patterns - try to complete|author=Adam P. Goucher|date=February 17, 2010|accessdate=May 8, 2013}}</ref> A [[catalyst]] that could replace the block was found with [[Bellman]], a program for searching catalytic reactions, developed by Mike Playle. | ||
Given its small [[repeat time]], the snark made [[oscillator]]s of previously unknown periods of [[:Category:Oscillators with period 43|43]] and [[:Category:Oscillators with period 53|53]] trivial.<ref>{{cite web|url= | Given its small [[repeat time]], the snark made [[oscillator]]s of previously unknown periods of [[:Category:Oscillators with period 43|43]] and [[:Category:Oscillators with period 53|53]] trivial.<ref>{{cite web|url= | ||
Revision as of 15:49, 12 January 2018
| Snark | |||||||||
| View static image | |||||||||
| Pattern type | Stable reflector | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 52 | ||||||||
| Bounding box | 23 × 17 | ||||||||
| Angle | 90° | ||||||||
| Repeat time | 43 | ||||||||
| Discovered by | Mike Playle | ||||||||
| Year of discovery | 2013 | ||||||||
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The snark is a 90° stable glider reflector discovered by Mike Playle in April 2013.[1] It is made up of two eaters, a block and a 31-bit still life, the heart of the Snark. It is currently the fastest and the smallest 90° stable glider reflector, both in terms of the population and the bounding box. Another commonly-used stabilization of the catalyst is 34 bits, and many other variants are available.
| (click above to open LifeViewer) |
The base reaction was discovered by Dietrich Leithner about 1998, but it consumed another block.[2] A catalyst that could replace the block was found with Bellman, a program for searching catalytic reactions, developed by Mike Playle.
Given its small repeat time, the snark made oscillators of previously unknown periods of 43 and 53 trivial.[3] It also made most large symmetrical Herschel-loop guns obsolete, since it is now possible to make use of the Herschel gliders with a shorter path of the Herschel track itself. [4]
References
- ↑ Mike Playle (April 25, 2013). "Just the place for a Snark!". Retrieved on March 27, 2016.
- ↑ Adam P. Goucher (February 17, 2010). "Re: Incomplete search patterns - try to complete". Retrieved on May 8, 2013.
- ↑ Matthias Merzenich (April 25, 2013). "Re: Just the place for a Snark!". Retrieved on March 27, 2016.
- ↑ Dave Greene (June 8, 2013). "Re: Just the place for a Snark!". Retrieved on April 5, 2017.