Life Objects Buildable With 4 Gliders

Still-lifes | Pseudo-still-lifes | P2 oscillators | P2 pseudo-oscillators | P8 oscillator | Constellations | Methuselahs | Naturally-occurring objects



Since only a small fraction of all the possible 4-glider interactions have been tracked, it is likely that many of these lists are incomplete.



111 still-lifes buildable from 4 gliders

Due to space limitations, these and their syntheses are shown on a separate page.


33 pseudo-still-lifes buildable from 4 gliders

4-glider pseudo-still-lifes

Block below carrier [4] Down boat on boat [4] Boat on beehive [4] Down boat on ship [4] Block above eater [4] Block on eater [4] Block below python [4] Block on block on block [4] Block on pond [4]
Beehive on ship [4] Down boat on long boat [4] Beehive on loaf [4] Boat on pond [4] Beehive on eater [4] Beehive above eater [4] Down boat on long ship [4] Down ship below eater [4] Beehive on pond [4]
Up loaf on loaf [4] Up eater tail above eater [4] Down eater tail below eater [4] Loaf on pond [4] Block on block on loaf [4] Pond above eater [4] Pond on pond [4] Trans up and down boats on ship [4] Two blocks on two blocks [4]
Two down boats on loaf [4] Up boats on and above eater [4] Two blocks on two boats [4] Two boats on pond [4] Up boat above and up loaf on eater [4] Boat on boat on boat on boat [4]  


2 period 2 oscillators buildable from 4 gliders

4g P2

Clock [4] Spark coil [4]

Clocks have thumbs that can sometimes be used to suppress diagonal bit-sparks, allowing clocks to be used as rocks to stabilize some larger oscillators.


3 period 2 pseudo-oscillators buildable from 4 gliders

4gl pseudo-P2

Block on beacon [4] Up boat on beacon [4] Cis block on beacon on block [4]


1 period 8 oscillator buildable from 4 gliders

4g P8

Figure-8; Big beacon [4]

Figure-8 is the smallest oscillator that produces a period 8 (delayed) domino spark.


8 small constellations buildable from 4 gliders

There are an infinite number of 4-glider constellations; these are some of the most common.

4-glider constellations

Two tubs offset (4, 0) [4] Two bowties and two half traffic lights [4] Two pulsars offset (16, 0) [4]
Two boats pointing in opposite directions [4] 4 Beehives, 2 boats, 2 blinkers (via Thunderbird) Two pulsars offset (17, 0) [4]
Bi-bakery [4] Two pulsars offset (16, 2) [4]


6 methuselahs buildable from 4 gliders

4-glider methuselahs

Thunder- bird (@1) [4] Acorn [4] Multum in parvo [4] Un- stabil- ized switch engine [4] Jaydot (@-1) [4] Glider- mango collision (@-4), Glider- mango mess, Pi heptomino and block (@3) [4]
4 Beehives, 2 boats, 2 blinkers (@244) Oak: Mango, 2 ponds, 5 loaves, 2 barges, 2 ships, 30 beehives, 3 ships, 8 boats, 34 blocks, 41 blinkers, 13 gliders (@5206) Block on beehive, pond, 6 loaves, toad, 28 beehives, 6 ships, 8 boats, 2 tubs, 40 blocks, 36 blinkers, 13 gliders (@3933) 2 Ponds, 2 long boats, 11 loaves, 33 beehives, 4 ships, 11 boats, 2 tubs, 60 blocks, 50 blinkers, 12 gliders (@3911) 1 Fleet, 1 pond, 13 loaves, 1 toad, 5 ships, 9 boats, 5 tubs, 68 blocks, 66 blinkers, 26 gliders (@6929) Penta- decathlon, pond, 6 loaves, toad, 18 beehives, ship, 12 boats, tub, 30 blocks, 18 blinkers, 4 gliders (@2585)

Note that the minimum sizes of Acorn and Multum in parvo are the same size (7 bits), their censuses are the same size (633 bits), and both release 13 gliders, but they are totally unrelated in any other way.



The top 113 naturally-occurring objects buildable from 4 gliders

4-glider natural objects

12.3; Half fleet; Ship tie ship [4] (730) Carrier; Aircraft carrier [4] (13077) Long ship [4] (24259) Shil- lelagh [4] (32987) 9.4; Integral [4] (35129) 10.24; Bowtie; Boat tie boat [4] (32688) Snake [4] (32880) 14.36; Bit S [4] (39770) 9.5; Up boat w/ tail [4] (87374)
11-30; Ship tie boat [4] (109739) Tub w/ tail; Twit [4] (139675) 10.2; Very long ship [4] (161862) 12.25; Cis table on table [4] (181444) 8.2; Canoe; Sinking ship [4] (219181) 14.55; Up bun on bun; Cis- mirrored R-bee [4] (346884) 15.243; Moose; Moose antlers [4] (382224) 10.25; Block on table [4] (414201) 14.89; Block on dock; [4] (422961)
16.737; Beehive on dock; [4] (629542) 10.7; Beehive w/ tail [4] (648130) 16.644; Scorpion [4] (810964) 10.4; Loop; Long hat [4] (832569) 14.39; Four- teener [4] (959835) 9.6; Down boat w/ tail [4] (1.2e6) Python; Long snake [4] (1.3e6) 14.13; Down bun on bun; Trans- mirrored R-bee [4] (1.4e6) 18.287; House on house; Dead spark coil; JC [4] (1.4e6)
14.590; Up bookend on bookend; Cis- mirrored hook; Bookends [4] (1.4e6) 11.38; Gull; Intens- ionless; Elevener [4] (1.4e6) 12.27; Block on cap [4] (1.5e6) 11.58; Down loaf w/ tail [4] (1.5e6) 14.87; Down bookend down on bookend; Cis- rotated hook [4] (1.5e6) 12.29; Block on up long bookend [4] (1.7e6) Clock [4] (1.7e6) 10.20; Cis shil- lelagh [4] (1.9e6) 20.5320; Dock on dock; Mirrored dock [4] (1.9e6)
14.589; Down bun on bookend; Trans- hook and R-bee [4] (2.1e6) 12.111; Block w/ cover [4] (2.2e6) 15.462; Up boat on dock [4] (2.3e6) 8.1; Very long snake [4] (2.4e6) 10.17; Integral w/ tub; Tub w/ nine [4] (2.6e6) 15.114; Down bun on wing; Trans- R-bee and R-loaf [4] (3.0e6) 14.591; Up bun on bookend; Cis- hook and R-bee [4] (3.2e6) 9.9; Tub w/ long tail [4] (3.4e6) 11.43; Loaf siamese loaf [4] (3.7e6)
8.4; Hook w/ tail; Snake eater [4] (3.7e6) 11.33; Very long hat; Eleven- loop [4] (3.9e6) 10.18; Claw w/ tail; Great snake eater [4] (4.6e6) 16.129; Sym- metric scorpion [4] (4.8e6) 11.53; Up loaf w/ tail [4] (4.8e6) 15.360; Bee hat [4] (5.1e6) 9.3; Long canoe [4] (5.1e6) 12.7; Boat tie eater [4] (5.9e6) 13.224; Down snake on bun; [4] (5.9e6)
11.37; Up boat on table [4] (6.2e6) 12.8; Beehive on table [4] (6.4e6) 10.5; Up barge w/ tail [4] (6.7e6) 11.11; Integral w/up boat; Trans- boat w/ nine [4] (7.9e6) 12.112; Beehive w/ hooked tail; Beehive bend tail [4] (8.3e6) 12.104; Bi- beehive; Beehive tie beehive [4] (8.8e6) Figure-8; Big beacon [4] (3.3e7) Spark coil [4] (3.6e7)  



Other costs: 2 gliders, 3 gliders, 4 gliders, 5 gliders, 6 gliders, 1 glider/bit, >1 glider/bit, unknown.

See also: Life objects sorted by: counts, frequency of occurrence, cost in gliders, name, size in bits, or type.

Home page | Life page

Copyright © 1997, 1998, 1999, 2013, 2014 by Mark. D. Niemiec. All rights reserved.
This page was last updated on 2015-02-19.