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Created page with "{{Fuse |name = Block fuse |pname = blockfuse |p = 8 |s = c/2 |rulespecial = Conway Life |plaintext = true |rle = true |viewerconfig = #C THUMBSIZE 2 GPS 4 X 16 ZOOM 16 TRACKLOOP 12 -2/3 0 AUTOSTART }}"
 
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{{Fuse
{{ambox|text=Discussion thread about collections of fuses on LifeWiki:{{br}}https://conwaylife.com/forums/viewtopic.php?f=16&t=6262}}
|name        = Block fuse
{{cleanup}}
|pname        = blockfuse
A '''block fuse''' is any [[fuse]] that burns through a [[Blockic]] constellation.
|p            = 8
 
|s            = c/2
This list does not include trivial fuses where a spaceship [[Fly-by deletion|deletes]] or modifies stationary objects, or engineered fuses consisting of parts that can be trivially rearranged to get different speeds. Spaceship-based fuses are known for [[c/2 orthogonal]], [[c/3 orthogonal]], [[c/6 orthogonal]], [[c/4 diagonal]], and [[c/7 diagonal]].
|rulespecial  = [[Conway's Game of Life|Conway Life]]
 
|plaintext    = true
==Known block fuses==
|rle          = true
 
|viewerconfig = #C [[ THUMBSIZE 2 GPS 4 X 16 ZOOM 16 TRACKLOOP 12 -2/3 0 AUTOSTART ]]
=== Orthogonal ===
 
==== 2c/3 bi-block fuse ====
{{main|bi-block fuse}}
This 2c/3 bi-block fuse is a [[clean]] [[fuse]] which consists of a single [[pre-beehive]] used to ignite one row of [[bi-block]]s separated by 2-cell gaps. It is used in [[moving sawtooth 707]].
{{EmbedViewer
|pname        = biblockfuse
|viewerconfig = #C [[ THUMBSIZE 2 GPS 4 X 16 ZOOM 16 TRACKLOOP 12 -2/3 0 ]]
|position    = center
}}
}}
==== 4c/7 block fuse ====
This 4c/7 block fuse is a [[clean]] [[fuse]] which consists of a single [[pre-beehive]] used to ignite two rows of blocks separated by 3-cell gaps, similarly to the 2c/3 bi-block fuse.<ref name="post156990"></ref>
{{EmbedViewer
|rle = x = 76, y = 24, rule = B3/S23
7$18b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o$18b2o2b2o2b2o
2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2obo2bo$66b2o3$18b2o2b2o2b2o2b2o2b2o
2b2o2b2o2b2o2b2o2b2o2b2o2b2o$18b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o
2b2o2b2o!
|viewerconfig = #C [[ THUMBSIZE 2 GPS 4 X 20 ZOOM 16 TRACKLOOP 14 -4/7 0 ]]
|position    = center
}}
====p36 c/2 block fuse====
This fuse can ignite two rows of blocks spaced 3 cells apart, like the debris of [[pufferfish]]. Despite its common speed, it has an extremely high period. It is used in [[pufferfish spaceship]].<ref name="post15269"></ref>
{{EmbedViewer
|rle = x = 51, y = 30, rule = B3/S23
35b2o3b2o$35b2o3b2o2$8b2o3b2o$8b2o3b2o2$35b2o3b2o$35b2o3b2o2$8b2o3b2o
$8b2o3b2o2$35b2o3b2o$19bo10bo4b2o3b2o$3bo14b3o8b3o14bo$2b3o3b2o3bobob
2obo7b2obo13b3o$b2o2bo2b2o9bo8b3o13b2obo$b4obo6bo3bobo8b3o13b2o$2o5bo
7b2o2b2o7b4o14b2o$bo16bo2bo6bo2bo11bo2b2o$bob3o2bo4bobo2b2o7b2o14bo4b
o$bobo3b2o4bobo2b2o3bo4bobo11bo2bobo$b2o6bo2bo7bo2bo4b3o10b2o3b2o$o5b
obo4bobo4bob2o16bo$b2o2bo2bo4bo6bob2o12bo4b2o$b2o3b2o7b2o3b2ob2o2b2o6b
6o$24bo4bo4bobobobo7b3o$30bo3bo2bo9bo$30bo4bo10bo$29bo17bobo!
|viewerconfig = #C [[ THUMBSIZE 2 ZOOM 8 ]]
|position    = center
|caption = p36 fuse
}}
Before that, [[Ivan Fomichev]] found a [[dirty|dirtier]] p36 c/2 fuse.<ref name="post15269"></ref>
{{EmbedViewer
|rle = x = 14, y = 47, rule = B3/S23
2o3b2o$2o3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o
3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o3b2o4$11bo$2o3b2o3b3o$2o3b2o2bo2b2o$9bo
3bo$13bo$12bo!
|viewerconfig = #C [[ THUMBSIZE 2 ZOOM 5 ]]
|position    = center
|caption = Dirtier p36 fuse
}}
December 29th, 2014, [[Nora Brown]] found additional [[pufferfish spaceship]] variants and p36 c/2 block fuse variants.<ref name="post15368"></ref>
{{EmbedViewer
|rle = x = 248, y = 28, rule = B3/S23
37b2o3b2o$37b2o3b2o2$10b2o3b2o$10b2o3b2o91b2o3b2o$108b2o3b2o$37b2o3b2o
$37b2o3b2o37b2o3b2o$81b2o3b2o83b2o3b2o56b2o3b2o$10b2o3b2o4bo149b2o3b2o
56b2o3b2o$5bo4b2o3b2o3b3o8b3o57b3o14b2o3b2o$4b3o12b2o2bo7bo2bo12b3o25b
3o13bo2bo13b2o3b2o29b2o3b2o56b2o3b2o$3b2o2bo10bo3b2o5bo7b2o3b2o3bo2bo
24bo2bo11bo3bo49b2o3b2o56b2o3b2o$6b2o10bo2b2o6bo6b3o3b2o2bo3bo23bo2b2o
2b2o3b2o2b3o2bo58b3o61bo$6bo2bo8bo10bo5bo10bo3bo22b3o5b2o3b2o3bobob2o
41b3o12bo2bo14b2o3b2o24bo14b3o14b2o3b2o$10b2o3bobo4bo7bo4bo10bo2bo23b
o19bo2bo5b3o32bo2bo12bo4bo12b2o3b2o23b3o12b2o2bo13b2o3b2o$5b7o3bo7bo7b
3o13b2o24b2o18bo2bo4bo2bo3b2o3b2o3b3o16bo3bo10b2o5bo40b2o2bo11bob4o$2o
b2o11bo6bo50bo19b2o5bo3bo2b2o3b2o2bo2bo15bo2b3o2b2o3b2ob2o45bo2b3o2b2o
3b2o2bob2ob2o$3obo12b3ob2o78bo3bo14bo14b2obobo3b2o3b2o2b2obo8b3o31bob
o5b2o3b2o2b2obob2o5b3o$b3o19bo78bo2bo11bobo15bo2bo17bo3bo4bo2bo12b3o14b
o2bo17bo2b2o4bo2bo12b3o$103b2o13bo3bo12bo2bo17bo2b2o2bo7b2o3b2o3bo2bo
14b2o18bo2bo3bo7b2o3b2o3bo2bo$89b2o31bo13b2o19b2o4bo6b3o3b2o2bo3bo14b
2o19b2o4bo6b3o3b2o2bo3bo$74bo16bo31bo39bo5bo10bo3bo41bo5bo10bo3bo$73b
3o88bo4bo10bo2bo43bo4bo10bo2bo$72b2ob2o88b3o13b2o45b3o13b2o$72b2ob2o19b
2o43b2o$73b3o20b2o42bo$74bo!
|viewerconfig = #C [[ THUMBSIZE 2 ZOOM 2 ]]
|position    = center
|caption = Other variants of p36 c/2 block fuse
}}
==== 3c/10 block fuse ====
This [[3c/10 orthogonal]] block fuse consists of a single [[pi-heptomino]] used to ignite two rows of blocks separated by 7-cell gaps. It is used in [[Pi ship 1]].
{{EmbedViewer
|rle = x = 25, y = 74, rule = B3/S23
2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o
21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o6$11b
3o$10bo3bo$2o8b2ob2o8b2o$2o21b2o!
|viewerconfig = #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 7 GPS 25 LOOP 241 PAUSE 2 T 240 PAUSE 2 ]]
|position = center
|style  = width:300px;
}}
==== 4c/29 block fuse ====
This 4c/29 orthogonal block fuse consists of a single [[U-turner]] used to ignite two rows of blocks staggered by 4 cells. It is used in a [[growing spaceship]].
{{EmbedViewer
|rle = x = 35, y = 33, rule = B3/S23
5$20b2o$19bo2bo$23bo$15b3o2b2o$15b3o4bo$6b2o6bobo$6b2o6b2o4bo$20bo$20b
o$26b2o$26b2o3$6b2o$6b2o3$26b2o$26b2o3$6b2o$6b2o3$26b2o$26b2o!
|viewerconfig = #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 16 GPS 25 LOOP 241 PAUSE 2 T 240 PAUSE 2 ]]
|position = center
|style  = width:300px;
}}
=== Diagonal ===
=== Reburnable ===
====(34,7)c/156 block fuse====
{{main|(34,7)c/156_Herschel_climber}}
This [[reburnable fuse]] consists of a Herschel crawling though blocks. An [[unnamed (34,7)c/156 spaceship]] has been built using this fuse, and reactions that delete the beehives along with the excess blocks are known (see links in main article).
{{EmbedViewer
|pname        = 347c156climber
|viewerconfig = #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 4 X 70 Y -40 TRACKLOOP 312 -34/156 7/156 ]]
|position    = center
}}
====31c/240 block fuse====
{{main|31c/240 Herschel-pair climber}}
This [[reburnable fuse]] consists of a Herschel crawling though blocks. Seven 31c/240 spaceships are known which use this fuse: [[centipede]], [[shield bug]], [[silverfish]], [[leaf bug]], [[leaf bug 2]], [[mannaz]], and [[water strider]].
{{EmbedViewer
|pname        = 31c240reaction
|viewerconfig = #C [[ GPS 60 X  0 Y 40 TRACKLOOP 240 0/240 -31/240 THUMBSIZE 2 ZOOM 4 HEIGHT 480 ]]
|position    = center
}}
==See also==
* [[Blinker fuse]]
* {{rl|Grounded Life#Beehive/block reburnable fuse|Grounded Life}}, which has a notable reburnable block fuse that is used in most circuitry in this rule.
==References==
<references>
<ref name="post156990">{{LinkForumThread
|format = ref
|title = Re: Fuse thread
|p      = 156990
|author = pipsqueek
|date = February 6, 2023
}}</ref>
<ref name="post15269">{{LinkForumThread
|format = ref
|title = Pufferfish and companions
|p      = 15269
|author = Ivan Fomichev
|date = December 27, 2014
}}</ref>
<ref name="post15368">{{LinkForumThread
|format = ref
|title = Re: Pufferfish and companions
|p      = 15368
|author = Nora Brown
|date = December 29, 2014
}}</ref> </references>
[[Category:Fuses]]

Latest revision as of 16:10, 23 March 2026

Discussion thread about collections of fuses on LifeWiki:
https://conwaylife.com/forums/viewtopic.php?f=16&t=6262


This article may require cleanup to meet LifeWiki's quality standards.

A block fuse is any fuse that burns through a Blockic constellation.

This list does not include trivial fuses where a spaceship deletes or modifies stationary objects, or engineered fuses consisting of parts that can be trivially rearranged to get different speeds. Spaceship-based fuses are known for c/2 orthogonal, c/3 orthogonal, c/6 orthogonal, c/4 diagonal, and c/7 diagonal.

Known block fuses

Orthogonal

2c/3 bi-block fuse

Main article: bi-block fuse

This 2c/3 bi-block fuse is a clean fuse which consists of a single pre-beehive used to ignite one row of bi-blocks separated by 2-cell gaps. It is used in moving sawtooth 707.

x = 47, y = 5, rule = B3/S23 2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o$2o2b2o2b2o2b2o2b2o2b2o 2b2o2b2o2b2o2b2o2b2obo2bo$44b2o$2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o 2b2o$2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 GPS 4 X 16 ZOOM 16 TRACKLOOP 12 -2/3 0 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here

4c/7 block fuse

This 4c/7 block fuse is a clean fuse which consists of a single pre-beehive used to ignite two rows of blocks separated by 3-cell gaps, similarly to the 2c/3 bi-block fuse.[1]

x = 76, y = 24, rule = B3/S23 7$18b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o$18b2o2b2o2b2o 2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2obo2bo$66b2o3$18b2o2b2o2b2o2b2o2b2o 2b2o2b2o2b2o2b2o2b2o2b2o2b2o$18b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o2b2o 2b2o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 GPS 4 X 20 ZOOM 16 TRACKLOOP 14 -4/7 0 ]]
(click above to open LifeViewer)

p36 c/2 block fuse

This fuse can ignite two rows of blocks spaced 3 cells apart, like the debris of pufferfish. Despite its common speed, it has an extremely high period. It is used in pufferfish spaceship.[2]

x = 51, y = 30, rule = B3/S23 35b2o3b2o$35b2o3b2o2$8b2o3b2o$8b2o3b2o2$35b2o3b2o$35b2o3b2o2$8b2o3b2o $8b2o3b2o2$35b2o3b2o$19bo10bo4b2o3b2o$3bo14b3o8b3o14bo$2b3o3b2o3bobob 2obo7b2obo13b3o$b2o2bo2b2o9bo8b3o13b2obo$b4obo6bo3bobo8b3o13b2o$2o5bo 7b2o2b2o7b4o14b2o$bo16bo2bo6bo2bo11bo2b2o$bob3o2bo4bobo2b2o7b2o14bo4b o$bobo3b2o4bobo2b2o3bo4bobo11bo2bobo$b2o6bo2bo7bo2bo4b3o10b2o3b2o$o5b obo4bobo4bob2o16bo$b2o2bo2bo4bo6bob2o12bo4b2o$b2o3b2o7b2o3b2ob2o2b2o6b 6o$24bo4bo4bobobobo7b3o$30bo3bo2bo9bo$30bo4bo10bo$29bo17bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 ]]
p36 fuse
(click above to open LifeViewer)

Before that, Ivan Fomichev found a dirtier p36 c/2 fuse.[2]

x = 14, y = 47, rule = B3/S23 2o3b2o$2o3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o 3b2o5$2o3b2o$2o3b2o5$2o3b2o$2o3b2o4$11bo$2o3b2o3b3o$2o3b2o2bo2b2o$9bo 3bo$13bo$12bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 5 ]]
Dirtier p36 fuse
(click above to open LifeViewer)

December 29th, 2014, Nora Brown found additional pufferfish spaceship variants and p36 c/2 block fuse variants.[3]

x = 248, y = 28, rule = B3/S23 37b2o3b2o$37b2o3b2o2$10b2o3b2o$10b2o3b2o91b2o3b2o$108b2o3b2o$37b2o3b2o $37b2o3b2o37b2o3b2o$81b2o3b2o83b2o3b2o56b2o3b2o$10b2o3b2o4bo149b2o3b2o 56b2o3b2o$5bo4b2o3b2o3b3o8b3o57b3o14b2o3b2o$4b3o12b2o2bo7bo2bo12b3o25b 3o13bo2bo13b2o3b2o29b2o3b2o56b2o3b2o$3b2o2bo10bo3b2o5bo7b2o3b2o3bo2bo 24bo2bo11bo3bo49b2o3b2o56b2o3b2o$6b2o10bo2b2o6bo6b3o3b2o2bo3bo23bo2b2o 2b2o3b2o2b3o2bo58b3o61bo$6bo2bo8bo10bo5bo10bo3bo22b3o5b2o3b2o3bobob2o 41b3o12bo2bo14b2o3b2o24bo14b3o14b2o3b2o$10b2o3bobo4bo7bo4bo10bo2bo23b o19bo2bo5b3o32bo2bo12bo4bo12b2o3b2o23b3o12b2o2bo13b2o3b2o$5b7o3bo7bo7b 3o13b2o24b2o18bo2bo4bo2bo3b2o3b2o3b3o16bo3bo10b2o5bo40b2o2bo11bob4o$2o b2o11bo6bo50bo19b2o5bo3bo2b2o3b2o2bo2bo15bo2b3o2b2o3b2ob2o45bo2b3o2b2o 3b2o2bob2ob2o$3obo12b3ob2o78bo3bo14bo14b2obobo3b2o3b2o2b2obo8b3o31bob o5b2o3b2o2b2obob2o5b3o$b3o19bo78bo2bo11bobo15bo2bo17bo3bo4bo2bo12b3o14b o2bo17bo2b2o4bo2bo12b3o$103b2o13bo3bo12bo2bo17bo2b2o2bo7b2o3b2o3bo2bo 14b2o18bo2bo3bo7b2o3b2o3bo2bo$89b2o31bo13b2o19b2o4bo6b3o3b2o2bo3bo14b 2o19b2o4bo6b3o3b2o2bo3bo$74bo16bo31bo39bo5bo10bo3bo41bo5bo10bo3bo$73b 3o88bo4bo10bo2bo43bo4bo10bo2bo$72b2ob2o88b3o13b2o45b3o13b2o$72b2ob2o19b 2o43b2o$73b3o20b2o42bo$74bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 2 ]]
Other variants of p36 c/2 block fuse
(click above to open LifeViewer)

3c/10 block fuse

This 3c/10 orthogonal block fuse consists of a single pi-heptomino used to ignite two rows of blocks separated by 7-cell gaps. It is used in Pi ship 1.

x = 25, y = 74, rule = B3/S23 2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o 21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o8$2o21b2o$2o21b2o6$11b 3o$10bo3bo$2o8b2ob2o8b2o$2o21b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 7 GPS 25 LOOP 241 PAUSE 2 T 240 PAUSE 2 ]]
(click above to open LifeViewer)

4c/29 block fuse

This 4c/29 orthogonal block fuse consists of a single U-turner used to ignite two rows of blocks staggered by 4 cells. It is used in a growing spaceship.

x = 35, y = 33, rule = B3/S23 5$20b2o$19bo2bo$23bo$15b3o2b2o$15b3o4bo$6b2o6bobo$6b2o6b2o4bo$20bo$20b o$26b2o$26b2o3$6b2o$6b2o3$26b2o$26b2o3$6b2o$6b2o3$26b2o$26b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 16 GPS 25 LOOP 241 PAUSE 2 T 240 PAUSE 2 ]]
(click above to open LifeViewer)

Diagonal

Reburnable

(34,7)c/156 block fuse

Main article: (34,7)c/156_Herschel_climber

This reburnable fuse consists of a Herschel crawling though blocks. An unnamed (34,7)c/156 spaceship has been built using this fuse, and reactions that delete the beehives along with the excess blocks are known (see links in main article).

x = 297, y = 199, rule = B3/S23 262b2o$263b2o$262bo23$274b2o$274b2o19b2o$283b2o10b2o$282bo2bo$283b2o3$ 240b2o$240b2o19b2o$249b2o10b2o$248bo2bo$249b2o3$194bo11b2o$194b3o9b2o 19b2o31b2o$194bobo18b2o10b2o32b2o$196bo17bo2bo42bo$215b2o4$140b2o$140b 2o16$149b2o$148bobo$150bo142b2o$281b2o10b2o$280bo2bo$281b2o4$259b2o$ 247b2o10b2o$246bo2bo$247b2o3$192bo11b2o$192b3o9b2o19b2o$192bobo18b2o 10b2o$194bo17bo2bo$213b2o4$138b2o$138b2o16$147b2o$146bobo$148bo50$3b2o $2bobo$4bo38$b2o$obo$2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 600 WIDTH 600 THUMBSIZE 2 ZOOM 4 X 70 Y -40 TRACKLOOP 312 -34/156 7/156 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here

31c/240 block fuse

Main article: 31c/240 Herschel-pair climber

This reburnable fuse consists of a Herschel crawling though blocks. Seven 31c/240 spaceships are known which use this fuse: centipede, shield bug, silverfish, leaf bug, leaf bug 2, mannaz, and water strider.

x = 66, y = 148, rule = B3/S23 5b2o57b2o$5b2o57b2o30$5b2o57b2o$5b2o57b2o30$5b2o57b2o$5b2o57b2o18$60b 3o$60bo2bo$60bo2bo$59b4o$12b3o44b2o$13bo44bo$11b3o45bo$59bo8$3b2o$3b2o 8b2o41b2o$13b2o41b2o5$2bo$bobo$o3bo$o3bo$4bo$b3o7$5b2o57b2o$5b2o57b2o 12$13b2o41b2o$13b2o41b2o17$5b2o57b2o$5b2o57b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 60 X 0 Y 40 TRACKLOOP 240 0/240 -31/240 THUMBSIZE 2 ZOOM 4 HEIGHT 480 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here

See also

References

  1. ↑ pipsqueek (February 6, 2023). Re: Fuse thread (discussion thread) at the ConwayLife.com forums
  2. ↑ 2.0 2.1 Ivan Fomichev (December 27, 2014). Pufferfish and companions (discussion thread) at the ConwayLife.com forums
  3. ↑ Nora Brown (December 29, 2014). Re: Pufferfish and companions (discussion thread) at the ConwayLife.com forums
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