Backrake 2: Difference between revisions
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m Ah, it's synthesisRLE not synthesisrle -- I'm out of practice, and also why are those letters capitalized anyway when "rle" isn't? |
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|s = c/2 | |s = c/2 | ||
|discoverer = David Buckingham | |discoverer = David Buckingham | ||
|rulemin = B3/S23 | |||
|rulemax = B38/S238 | |||
|rulespecial = [[Conway's Game of Life|Conway Life]] | |||
|isorulemin = B3/S23-y | |||
|isorulemax = B34e6c8/S234ct5ek6ei7e8 | |||
|plaintext = true | |plaintext = true | ||
|rle = true | |rle = true | ||
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|viewerconfig = #C [[ ZOOM 10 AUTOSTART OFF ]] | |viewerconfig = #C [[ ZOOM 10 AUTOSTART OFF ]] | ||
}} | }} | ||
'''Backrake 2''' is a [[period]] 12 [[backrake]] that was created by [[David Buckingham]]. It works by having a front [[puffer]] made up of two [[lightweight spaceship]]s, a [[middleweight spaceship]], and a [[B-heptomino]] (much like [[puffer 2]]) send debris back to another lightweight and middleweight spaceship, which turn the debris into a backward-moving [[glider]]. | '''Backrake 2''' is a [[period]]-12 [[backrake]] that was created by [[David Buckingham]]. It works by having a front [[puffer]] made up of two [[lightweight spaceship]]s, a [[middleweight spaceship]], and a [[B-heptomino]] (much like [[puffer 2]]) send debris back to another lightweight and middleweight spaceship, which turn the debris into a backward-moving [[glider]]. | ||
Three copies of this backrake feature in [[total aperiodic]]. | Three copies of this backrake feature in [[total aperiodic]]. | ||
==Reduction== | |||
On April 28, {{year|2022}}, [[wwei23]] discovered a 39-cell period-12 backrake that works as a reduced version of Backrake 2 using the [[apgsearch]] custom symmetry WSS_test, that had also found [[35P12H6V0]].<ref name="post144828" /> [[Dave Greene]] found a {{gliders|13}} [[Glider synthesis|synthesis]] on November 1, 2022.<ref name="post152962" /> | |||
{{EmbedViewer | |||
|position = center | |||
|pname = wwei23backrake | |||
|viewerconfig = #C [[ ZOOM 20 Y 6 HEIGHT 480 TRACKLOOP 12288 0 -1/2 THUMBSIZE 2 GPS 4 AUTOSTART ]] | |||
|caption = 39-cell period-12 reduced version of backrake 2 | |||
|style = width:300px; | |||
}} | |||
==References== | |||
<references> | |||
<ref name="post152962">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Thread for Basic Questions | |||
|p = 152962 | |||
|author = Dave Greene | |||
|date = November 1, 2022 | |||
}}</ref> | |||
<ref name="post144828">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Spaceship Discussion Thread | |||
|p = 144828 | |||
|author = wwei23 | |||
|date = April 28, 2022 | |||
}}</ref> | |||
</references> | |||
==See also== | |||
*[[Backrake 1]] | |||
*[[Backrake 3]] | |||
Latest revision as of 20:39, 2 November 2022
| Backrake 2 | |||||||||
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| Pattern type | Rake Puffer | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Number of cells | 65 | ||||||||
| Bounding box | 19 × 26 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 12 | ||||||||
| Speed | c/2 | ||||||||
| Discovered by | David Buckingham | ||||||||
| Year of discovery | Unknown | ||||||||
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Backrake 2 is a period-12 backrake that was created by David Buckingham. It works by having a front puffer made up of two lightweight spaceships, a middleweight spaceship, and a B-heptomino (much like puffer 2) send debris back to another lightweight and middleweight spaceship, which turn the debris into a backward-moving glider.
Three copies of this backrake feature in total aperiodic.
Reduction
On April 28, 2022, wwei23 discovered a 39-cell period-12 backrake that works as a reduced version of Backrake 2 using the apgsearch custom symmetry WSS_test, that had also found 35P12H6V0.[1] Dave Greene found a 13-glider synthesis on November 1, 2022.[2]
| 39-cell period-12 reduced version of backrake 2 (click above to open LifeViewer) RLE: here Plaintext: here |
References
- ↑ wwei23 (April 28, 2022). Re: Spaceship Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (November 1, 2022). Re: Thread for Basic Questions (discussion thread) at the ConwayLife.com forums