List of common evolutionary sequences

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In late 2016, Simon Ekström determined the most common evolutionary sequences using 8×8 random soups.[1]

To qualify on the list, a pattern must initially have 12 or fewer cells and reach 20, staying above 12 for at least four generations with different population, at some point in its evolution. For this reason, the traffic light and interchange do not qualify.

Sequence Pattern Lifespan[note 1] Occurrences Relative frequency
Honey farm predecessor
2o$obo$obo$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 17 617733 1.000
R-pentomino
x = 3, y = 3, rule = B3/S23 b2o$2o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 1103 531779 0.861
Pi-heptomino
x = 3, y = 3, rule = B3/S23 3o$obo$obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 173 471544 0.763
Lumps of muck
x = 4, y = 3, rule = B3/S23 2o$b2o$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 63 471544 0.502
Century
x = 4, y = 3, rule = B3/S23 2b2o$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 103 266004 0.430
B-heptomino
x = 4, y = 3, rule = B3/S23 ob2o$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 148 244984 0.397
Wing
x = 4, y = 4, rule = B3/S23 b2o$o2bo$bobo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 104 133659 0.216
Herschel with block (B-heptomino descendant)
o11b2o$3o9b2o$obo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 128 121316 0.196
Teardrop
x = 4, y = 4, rule = B3/S23 b3o$o2bo$o2bo$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 20 64485 0.104
I-heptomino
x = 4, y = 4, rule = B3/S23 2o$bo$b2o$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 247 53177 0.086
Two-glider octomino
x = 4, y = 4, rule = B3/S23 2b2o$2b2o$3o$bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 385 50178 0.081
Generates a bi-block and another block
bobo$o2b2o$o2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 53 48239 0.078
Procrestinator [2][3]
o$3o$3bo$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 73 46879 0.076
Blonk-tie
x = 3, y = 5, rule = B3/S23 2o$2o$2bo$2bo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 552 38554 0.062
Unnamed
ob3o$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 238 37747 0.061
U-turner (name unofficial[4])
b3o$b3o$obo$2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 163 29273 0.047
Object hassled in period-184 glider gun, H'
2o$o2b2o$bo2bo$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 106 29196 0.047
Unnamed
2b2o$4bo$o2bo$3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 268 47154 0.046
Original diehard
x = 8, y = 3, rule = B3/S23 6bo$2o$bo3b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 130 27077 0.044
Object hassled in Jason's p22
2b3o$bo3bo$o4bo$bob2o$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 65 25303 0.041
Traffic light hits block
2o$2o4bo$5b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 47 24725 0.040
Dove
2b2o$bo2bo$o2bo$3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 200 23603 0.038
Unnamed
o2bo$bob2o$bo3b2o$4bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
 47 22654 0.0367
Herschel (by itself)
x = 3, y = 4, rule = B3/S23 o$3o$obo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 128 21929 0.0355
Butterfly
x = 4, y = 4, rule = B3/S23 o$2o$obo$b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 33 18593 0.0301
Octomino II
x = 4, y = 4, rule = B3/S23 bo$3o$ob2o$3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 4 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here
 116 18507 0.0300

Of the top 96, the E-heptomino ranks 53rd, the queen bee ranks 81st, and the pulsar ranks 86th. The F-heptomino, thunderbird, and switch engine do not make the top 96. The Z-hexomino ranks 146th.

This census for small, common active regions may provide insights into finding bottlenecks for new conduits.

See also

Notes

  1. ↑ Lifespan is measured from its canonical initial form, not from the form in the generated list.

References

  1. ↑ simeks (December 28, 2016). Census of small evolving patterns (discussion thread) at the ConwayLife.com forums
  2. ↑ Robert Wainwright (December 1971). Lifeline, vol 4, page 4.
  3. ↑ MathAndCode (November 1, 2020). Small predecessors of common objects and evolutionary sequences (discussion thread) at the ConwayLife.com forums
  4. ↑ MathAndCode (May 4, 2021). Re: Thread for basic questions (discussion thread) at the ConwayLife.com forums
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