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{{Oscillator|name=Loading dock|h=2.7|bx=9|by=8|c=22|pname=loadingdock|p=3|discoverer=David Buckingham|discoveryear=1972|life105=true|life106=true|plaintext=true|rle=true|animated=true|v=0.17}}
{{Oscillator
'''Loading dock''' is a [[period]] [[:Category:Oscillators with period 3|3]] [[oscillator]] that was found by [[:Category:Patterns found by David Buckingham|David Buckingham]] in September [[:Category:Patterns found in 1972|1972]]. It has the same [[rotor]] as [[six Ls]].
|name             = Loading dock
|pname            = loadingdock
|f1              = Billiard table
|c                = 22
|bx               = 9
|by               = 8
|p                = 3
|m                = 3
|h                = 2.7
|v                = 0.17
|symmetry        = .e
|rotor            = Six Ls
|discoverer       = David Buckingham
|discoveryear     = 1972
|rulemin          = B3/S23
|rulemax          = B378/S0235678
|isorulemin      = B3ry/S2ack3ckry
|isorulemax      = B2-ae34cnqrtyz5-ekry6-ik78/S01c234-k5678
|synthesis        = 12
|synthesis2      = 8
|synthesisRLE    = true
|plaintext       = true
|rle             = true
|animated         = true
|apgcode          = xp3_ggc2d2sgz034b43
|apgcode2        = xp3_ok4r2arz622611
|pentadecathlonid = 22P3.92
|viewerconfig    = #C [[ GPS 2 ZOOM 24 LOOP 3 ]]
}}
'''Loading dock''' is a {{period|3}} [[oscillator]] that was found by [[David Buckingham]] in September {{year|1972}}.<ref>{{CiteHickersonOscillators|accessdate=March 14, 2020}}</ref>


==External links==
It has a [[stator]] variant with larger population but smaller bounding box, named '''six Ls''' due to one phase consisting of six L-[[tetromino]]es ([[tail]]s), as shown below.
 
{{EmbedViewer
|pname = sixls
|position = center
|viewerconfig = #C [[ GPS 2 ZOOM 24 LOOP 3 AUTOSTART ]]
|caption = six Ls
|apgcode = xp3_ca2r4kmz3116221
}}
 
== Synthesis ==
A {{gliders|14}} [[synthesis]] for loading dock and a 20-glider synthesis for six Ls were found by [[Jeremy Tan]] on March 29, {{year|2019}} based on [[soup]]s submitted to [[Catagolue]].<ref name="post74101" /> The latter was improved to {{gliders|18|brief}} gliders by [[Mark Niemiec]] two days later.<ref name="post74258" />
 
In December {{year|2020}}, [[GUYTU6J]] found a {{gliders|13}} synthesis of a {{LinkCatagolue|xp3_ok4r2arz622611|patternname=stator variant|style=raw}} of this oscillator<ref name="post117043" /> based on a suggestion from [[gmc_nxtman]] dating to November {{year|2015}}.<ref name="post25165" /> In January {{year|2023}}, Chris857 found a {{gliders|10}} synthesis of that stator variant as well as a {{gliders|17}} synthesis of six Ls.<ref name="post155490"/> In January {{year|2023}}, [[Carson Cheng]] found a {{gliders|10}} synthesis of six Ls tying the cost of the other stator variant.<ref name="post156112"/> On September 3, {{year|2023}}, [[May13]] found a {{gliders|12}} synthesis of loading dock.<ref name="post166325"/>
 
== References ==
<references>
<ref name="post74101">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 74101
|author = Jeremy Tan
|date  = March 29, 2019
}}</ref>
<ref name="post74258">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 74258
|author = Mark Niemiec
|date  = March 31, 2019
}}</ref>
<ref name="post117043">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 117043
|author = GUYTU6J
|date  = December 27, 2020
}}</ref>
<ref name="post25165">{{LinkForumThread
|format = ref
|title  = Re: Soup search results
|p      = 25165
|author = gmc_nxtman
|date  = November 17, 2015
}}</ref>
<ref name="post155490">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 155490
|author = Chris857
|date  = January 2, 2023
}}</ref>
<ref name="post156112">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 156112
|author = Carson Cheng
|date  = January 18, 2023
}}</ref>
<ref name="post166325">{{LinkForumThread
|format = ref
|title  = Re: Synthesising Oscillators
|p      = 166325
|author = May13
|date  = September 3, 2023
}}</ref>
</references>
 
== External links ==
{{LinkLexicon|lex_l.htm#loadingdock}}
{{LinkLexicon|lex_l.htm#loadingdock}}
{{LinkCatagolue|xp3_ggc2d2sgz034b43}}
{{LinkPentadecathlonObject|22P3.92}}
{{LinkLexicon|lex_s.htm#sixls|patternname=Six Ls}}
{{LinkCatagolue|xp3_ca2r4kmz3116221|patternname=Six Ls}}
{{LinkPentadecathlonObject|24P3.122}}


[[Category:Patterns with S2 symmetry]]
{{seminatural}}
[[Category:Billiard table configurations]]

Latest revision as of 19:16, 15 January 2026

Loading dock
x = 9, y = 8, rule = B3/S23 4bo$2b3o$bo3b2o$ob2o3bo$bo3b2obo$2b2o3bo$4b3o$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 2 ZOOM 24 LOOP 3 ]]
View animated image
View static image
Pattern type Oscillator
Oscillator type Billiard table
Number of cells 22
Bounding box 9 × 8
Period 3 (mod: 3)
Heat 2.7
Volatility 0.17 | 0.17
Kinetic symmetry .e
Rotor type Six Ls
Discovered by David Buckingham
Year of discovery 1972

Loading dock is a period-3 oscillator that was found by David Buckingham in September 1972.[1]

It has a stator variant with larger population but smaller bounding box, named six Ls due to one phase consisting of six L-tetrominoes (tails), as shown below.

x = 7, y = 8, rule = B3/S23 3bo$b3o2bo$o3b3o$3o$4b3o$3o3bo$o2b3o$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 2 ZOOM 24 LOOP 3 AUTOSTART ]]
six Ls
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagolue: here

Synthesis

A 14-glider synthesis for loading dock and a 20-glider synthesis for six Ls were found by Jeremy Tan on March 29, 2019 based on soups submitted to Catagolue.[2] The latter was improved to 18 gliders by Mark Niemiec two days later.[3]

In December 2020, GUYTU6J found a 13-glider synthesis of a stator variant of this oscillator[4] based on a suggestion from gmc_nxtman dating to November 2015.[5] In January 2023, Chris857 found a 10-glider synthesis of that stator variant as well as a 17-glider synthesis of six Ls.[6] In January 2023, Carson Cheng found a 10-glider synthesis of six Ls tying the cost of the other stator variant.[7] On September 3, 2023, May13 found a 12-glider synthesis of loading dock.[8]

References

  1. ↑ Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. ↑ Jeremy Tan (March 29, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  3. ↑ Mark Niemiec (March 31, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  4. ↑ GUYTU6J (December 27, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. ↑ gmc_nxtman (November 17, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  6. ↑ Chris857 (January 2, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  7. ↑ Carson Cheng (January 18, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  8. ↑ May13 (September 3, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
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