Pattern Of The Year 2023 Nominations

[dexter1]

... Is there anyone who thinks the entries should not be separated?

I think they should not be separated and that they belong together, because wickstretchers and greystretchers share the same principals. I don't think you need to differentiate/separate if a wick consists of one tub or a collection of tubs or lines, or if it requires edge- or base-stabilisation.

My opinion: Think of tubstretcher, or linestretchers as being the lowest order/tier of the family...

[HartmutHolzwart]

The difference between ordinary stretchers and greystretchers is that the latter are always infinite families of stretchers of growing widths.

As much as greyships are not single spaceships but families of them.

They go one step farther so to speak.

The particular twist in the new greystretchers is that they use higher period stabilization mechanism. This is a real novelty as compared to previous efforts.

[Sokwe]

I want to get back to this soon. I've just been busy. This post is an attempt to make a commitment to finalizing the list. I'll delete this post later when I actually get something done.

[Haycat2009]

Yeah, speaking of which when can we vote?

[Sokwe]

We also need some summary posts for some of the other group entries, such as engineered diehards and synthesis reductions.

Can someone write these? I don't have enough knowledge of those discoveries to do it myself.

[Goldtiger997]

Still life synthesis reductions
(by Alex Greason, Carson Cheng, Goldtiger997, May13, GUYTU6J, et al.)
In 2023, the most expensive 11-bit, 15-bit, and 17-bit still-lifes has their glider syntheses reduced. In particular, the milestones of reducing all 11-bitters to 5 gliders or less, all 15-bitters to 10 gliders or less, and all 17-bitters to 15 gliders or less, were achieved. Below is a pattern displaying the final syntheses discovered leading to the achievement of each of those milestones:

Code: Select all

#C From top to bottom, the syntheses are:
#C  - Amphisbaena in 5 gliders by Alex Greason (https://conwaylife.com/forums/viewtopic.php?p=172853#p172853)
#C  - xs15_31248a51246 in 9 gliders by Carson Cheng (https://conwaylife.com/forums/viewtopic.php?p=173961#p173961)
#C  - xs17_jhke0mqz1 in 15 gliders by Goldtiger997 (https://conwaylife.com/forums/viewtopic.php?p=174201#p174201)
x = 108, y = 179, rule = B3/S23
56bo$56bobo$56b2o$62bo$46bobo4b2o7bobo$47b2o3bobo7b2o$47bo6bo4$57b3o$
57bo$58bo32$72bo$73bo$71b3o9$27bo$25bobo$26b2o7bo41bo$33b2o43bo$34b2o
40b3o9bo4b2o$87bobo2bobo$39bo48bo2bo$38bo40bo9b2o$38b3o38b2o$34b2o42bo
bo$26bo6bobo$26b2o7bo$25bobo2$74bo$74b2o$73bobo37$53bobo$53b2o$54bo7$o
bo$b2o$bo103bo$105bobo$105b2o3$89bo$90b2o$89b2o9bobo$96bo3b2o$36bo57bo
bo4bo$35bo59b2o$35b3o5$29bobo$29b2o$30bo66b2o$33b2o52b2o8bo3b2o$33bobo
50bobo10bo2bo$33bo54bo9b2obo$96bo2bob2o$96b2o4$36bo$35b2o$35bobo14$43b
3o$43bo$19b2o23bo$20b2o$19bo2$48bo$47b2o$47bobo6$4b3o$6bo$5bo!

[Anivec]

Half way through the year and we still do not have any voting thread, is there something going on?

[Sokwe]

Half way through the year and we still do not have any voting thread, is there something going on?

We don't have a voting thread because we haven't finalized the nominee list. Anyone can construct a draft of the voting list from the various existing resources and post it in this thread for comments. If someone wants to do this, please try to match the forms of the voting threads from previous years. If no one bothers, I'll try to do it myself over the weekend.

After proposing a draft list and asking for comments, please do not start a voting thread until we've had at least a week to comment on the draft.

[Sokwe]

New SKOPs
(by Mitchell Riley, Nico Brown, Carson Cheng, iNoMed, Period1GliderGun, et al.)

Many new SKOPs were found in 2023. Some highlights are listed below. Many of these can interact with small sparkers to form SKOPs with multiples of their period:

Mold on fire-spitting: a nontrivial p12 oscillator that broke a record previously held for over 50 years by dinner table:

Code: Select all

#N Mold on fire-spitting
#O by Period1GliderGun, May 18, 2023
x = 8, y = 15, rule = B3/S23
3b2o$2bo2bo$bobobo$bo2bo$o$bobo2b2o$7bo$4bobo2$3bobo$3bo2bo$2obo$bo3b
2o$bob2o$2bo!

42P38: a symmetric p38 R-pentomino hassler.

Code: Select all

#N 42P38
#O by Mitchell Riley, April 12, 2023
x = 27, y = 25, rule = B3/S23
13bo$12bo2bo$12bo2bo2bo$14bo3bo$18bo3$o$3o$3bo14bo$2b2o14b2o$17b2o2$8b
2o$7b2o14b2o$8bo14bo$24b3o$26bo3$8bo$8bo3bo$8bo2bo2bo$11bo2bo$13bo!

44P49: a long, thin p49 that hassles an unnamed object.

Code: Select all

#N 44P49
#O by Mitchell Riley, November 14, 2023
x = 39, y = 13, rule = B3/S23
o18b2o$3o16b2o$3bo$2b2o$26b2o$14bo12bo6b2o$3b2o8b3o7b3o8b2o$3b2o6bo12b
o$11b2o$35b2o$35bo$18b2o16b3o$18b2o18bo!

p68 century hassler: an oscillator hassling only a single century.

Code: Select all

#N p68 century hassler
#O by Nico Brown, April 12, 2023
x = 23, y = 24, rule = B3/S23
12b2o$12b2o2$10b4o$10bo2bo4$bo$b3o12bo$4bo12bo$3b2o9bo2bo$14b3o4$2b2o
$bobo$bo$2o$19b2o$19bo$20b3o$22bo!

p76 pi-heptomino shuttle: a double pi-heptomino shuttle that uses only 6 catalysts.

Code: Select all

#N p76 pi-heptomino shuttle
#O by Carson Cheng, September 24, 2023
x = 27, y = 20, rule = B3/S23
2o23b2o$bo23bo$bobo19bobo$2b2o19b2o2$7bo$6b3o$6bo2bo$3bo19bo$2bobo17b
obo$2bobo17bobo$3bo19bo$6bo2bo$6b3o$7bo2$2b2o19b2o$bobo19bobo$bo23bo$
2o23b2o!

49P384: a p384 pi-heptomino hassler. Its engine has a base period of 64, but the debris it throws off causes a natural period sextupling.

Code: Select all

#N 49P384
#C 51-cell form by Mitchell Riley, April 1, 2023
#C 2-cell reduction by Period1GliderGun, December 5, 2023
x = 38, y = 19, rule = B3/S23
15b2o$15b2o3$14bo$4b2o8bo$2bob2o8bo$bo$4bo31b2o$2obo16bo13bob2o$2o18b
2o11bo$22bo13bo$13bo6b2o10b2obo$11b2o7bo11b2o$11bo$11b3o2$21b2o$21b2o!

[Sokwe]

New small guns
(by Mitchell Riley, Carson Cheng, iNoMed, Nico Brown, and Matthias Merzenich)

Many record-breaking guns of various periods were discovered in 2023:

Code: Select all

#N New small guns of various periods
#C p42: Mitchell Riley and iNoMed, Oct. 5, 2023
#C p49: Nico Brown, Apr. 18, 2023
#C p52: Mitchell Riley, Mar. 2, 2023
#C p59: Nico Brown, July 13, 2023
#C p61: Mitchell Riley, Apr. 5, 2023
#C p68: iNoMed and Matthias Merzenich, Mar. 6, 2023
#C p70: Carson Cheng, Jan. 17, 2023
#C p72: Carson Cheng and iNoMed, Jan. 18, 2023
#C p84: Carson Cheng, Jan. 19, 2023
#C p126: Nico Brown, Mitchell Riley, and iNoMed, Aug. 27, 2023
#C p201: iNoMed, Oct. 22, 2023
x = 766, y = 80, rule = B3/S23
4b2o3b2o4b2obo75b2o3b2o4b2obo78b2obo6b2obo54b2obo6b2obo64b2obo6b2o50b
2obo6b2obo53bob2o6b2obo51bob2o6b2obo44b2obo4b2o3b2o43b2o5b2obo6b2obo
57b2obo6b2obo6b2o$4b2o3b2o4bob2o75b2o3b2o4bob2o78bob2o6bob2o54bob2o6bo
b2o64bob2o7bo50bob2o6bob2o53b2obo6bob2o51b2obo6bob2o44bob2o4b2o3b2o44b
o5bob2o6bob2o57bob2o6bob2o7bo$19b2o82b2o4b2o74b2o14b2o50b2o8b2o4b2o60b
2o10bo49b2o8b2o4b2o55b2o2b2o4b2o53b2o8b2o40b2o4b2o52bo10b2o2b2o65b2o2b
2o4b2o4bo$4b2o3b2o8bo74b2o3b2o2bo5bo75bo15bo51bo9bo5bo61bo11b2o48bo9bo
5bo57bo2bo5bo55bo8bo41bo5bo3b2o3b2o43b2o9bo3bo66bo3bo5bo5b2o$4bobobobo
9bo73bobobobo3bo5bo75bo15bo51bo9bo5bo61bo61bo9bo5bo55bo4bo5bo53bo10bo
41bo5bo2bobobobo55bo3bo66bo3bo5bo$6bobo10b2o75bobo4b2o4b2o74b2o14b2o
50b2o8b2o4b2o60b2o10b2o48b2o8b2o4b2o55b2o2b2o4b2o53b2o8b2o40b2o4b2o4bo
bo45b2o9b2o2b2o65b2o2b2o4b2o4b2o$5b2obo6b2obo76b2obo6b2obo78b2obo6b2ob
o54b2obo6b2obo64b2obo7bo50b2obo6b2obo55b2o4bo5bo52b2o6b2obo44b2obo5b2o
bo46bo5b2obo6b2obo57b2obo4bo5bo6bo$9b2o4bob2o80b2o4bob2o78bob2o6bob2o
54bob2o6bob2o64bob2o6bo51bob2o6bob2o56bo5bo5bo52bo6bob2o44bob2o9b2o43b
o6bob2o6bob2o57bob2o5bo5bo4bo$10bo2b2o85bo8b2o80b2o2b2o62b2o8b2o60b2o
4b2o4b2o48b2o4b2o2b2o4b2o53bo5b2o4b2o51bo5b2o46b2o4b2o8bo43b2o3b2o8b2o
4b2o53b2o8b2o4b2o4b2o$9bo3bo85bo9bo81bo3bo63bo9bo61bo5bo55bo5bo3bo5bo
54b2o4bo5bo52b2o4bo47bo5bo8bo49bo9bo5bo54bo9bo5bo$9b2o3bo84b2o9bo81bo
3bo63bo9bo61bo5bo4b2o49bo5bo3bo5bo51b2o7bo5bo49b2o7bo47bo5bo7b2o43b2o
4bo9bo5bo54bo9bo5bo4b2o$10bo2b2o85bo8b2o80b2o2b2o62b2o8b2o60b2o4b2o5bo
48b2o4b2o2b2o4b2o52bo6b2o4b2o50bo6b2o46b2o4b2o8bo44bo3b2o8b2o4b2o53b2o
8b2o4b2o5bo$9bo5b2obo80bo5b2obo78b2obo6b2obo54b2obo6b2obo64b2obo6bo51b
2obo6b2obo53bo9b2obo51bo9b2obo44b2obo9bo44bo6b2obo6b2obo57b2obo6b2obo
6bo$9b2o4bob2o80b2o4bob2o78bob2o6bob2o54bob2o6bob2o64bob2o6b2o50bob2o
6bob2o53b2o8bob2o51b2o8bob2o44bob2o9b2o43b2o5bob2o6bob2o57bob2o6bob2o
6b2o20$748b2o$749bo$749bobo$321bob2o154b2o269b2o$321b2obo72b2o72b2o5bo
b2o2b2o177b2o58bo6b2o$270bo3b2o122bo72b2o5bobo3b2o177bo2b2o55b3o4b2o
28b2o$269bobobob3o41b5o4b2o68bob2o3b2o71bo185b2ob3o56bo33b2o$72b2o195b
obobo4bo39bo4bo5bo69bobo4bo69bo10bo32bobo147bo46bo7b2o$11b2o59bo118bo
9b2o67bobobobobo38bo2bo8bob2ob2o52b2o11bob3o10b2ob2o31bo34b3o33bo8b2o
130b2ob3o47b3o23b2o$11bo3bob2o45bob2ob2obo43b2o73b3o7bo2b2o66bobob2o4b
2o33bob2o9bobobo2bo51bo10b2obo13bobo32b3o21bo13bo28bo4bo2b2o3b2o72bo
38bo18b2obo52bo21bo2bo$7b2o3b5obo45b2obobobo6bo37bo77bo7b2ob3o52b2o9bo
bo8bo31b2obo5bo7bo4b2o51bobo23bobo2bo34bo22bo10b2o28b2obo2bob2o75b3o
36bobo73b2o4bobo15b2o$7bo2bobo57bo6bob2o18bo8bob2ob2obo27bo34b2o12b2o
13bo51b2o10bo7bobo32bobo4bobo65b2o22b3ob3o33b2o15b2o5bobo3b2o37b2o78bo
40bobo78bobo$9b2o2bo2b2o60b6o15b3o6b2obobobo6bo21b3o33bo21b2ob3o52b2o
18b2o32bo2b2o2bo2bo14b2o73b2o55b2o5bob2o2b2o6b2o81b2o26b2o39bo81bo$11b
2o2bobo63b3o7b2o9bo11bo6bob2o22bo32bobo19b2obo54b3o51b2o6b2o15bo8bo46b
3o16bo2bob2o36b2o7bo12b2o10bobo37b3o42bo76bo16b2o34b2o41b2o$11bobo59b
2o16b2o8b2o19b6o18bo34b2o3b2o72bobo5b2o67bobo7bobo54b2o11bo2bo35bobo7b
3o22b2o38bo44bobo73b2o16b2o35bo17bo22bo$12bo46bo8bo3b2obobo47b3o7b2o9b
o2bo35bo22bo51bo2bo6bo66b2o8bob3o41b2o2bob2o2b4o8bobobo36b2o11bo61bob
2ob2o39b2o11b2obo3b2o10b2o40bo55bobo14bobo20bo$b2o5b2o19bo28bo3bo4bobo
5b3o39b2o16b2o13bo33bo22bobo33bo17b4o3b2o74b2obo4bo39bobobo4b2o4bo8b2o
b2o47b2o62b2ob3o50bo5bo2bobo9b3o40bo55b2o13bo18bo4bo2bo4b2o$b2o5b2o17b
3o32bo3bo3b4o4bo33bo3b2obobo25bo2bo34bobo9b3o7bobo33b3o8b2obo5b3o78bob
obobobo38b5o5bo2b4o8bo129b2o35bobobo5bo7b2o6b2obo44bo61b2o2bo18bo12b2o
$17b3o6bo31b2ob2o4bo5b5o6b2ob2o3b2o13bo3bobo5b3o26b2o36bo9b4o6b2ob2o
35bo7bob2o6bob2o78bobob2o4b2o24b2o6b6o12b2o7b4o51bo2bo14b2o42b5o7b2o
35bo8b4o7bo7bobo43b2o60bo4b2o16bob3ob2o$16b2ob2o5b2o40b2o3b2ob2o6b5o5b
o3bo6b2ob3o3b4o4bo56b2o14b2o3bo9bo34b2o16bob2obo3b2o9bo42bo18bobo8bo
26bo5b2o2b2o2bo3bobo4bobo9bo34b2o14bo3bo13b2obo43bobo50b4o5bo4bo6bo2bo
42b2o67bo19b3o$16bo2b2o62bo4b4o3b3ob2o6bo3bo5b5o6b2ob2o3b2o41bobob2o6b
o2bobo3b2o4b2obo56bobo2bo9bobo42bo19bo7bobo26bobo3bo5bo2b4o2bo5bo8bo
34b2obo13bo4b3o11bo2bo30b2o65bo5bo2bo10b2o111b3o19bo$b2o5b2o7b2o37b2o
26b3o5bobo3bo13b2o3b2ob2o6b5o5bo4b2ob2o33bob2o4b2o3bobo2bo6b2obobo57bo
4bobo5b2o70b2o28b2o3bobo4bobo3bo2b2o2b2o8b2o34bo2bo13b3o16bobo30bo2bo
17b3o37bobo2bo5bo39b2o84b2ob3obo16b2o4bo$2obo3bob2o44bo2bo25bobob2o3bo
33bo4b4o3bo3bo36bo9bo3b2o14b2o47b2o7bobob2obobo53bo58b2o12b6o46bobo15b
o16b3o31b2obo11b2o3b2o39b2o3bob2o41bo2bob2o32bo39b2o12bo18bo2b2o$2b2o
3b2o46bo13b2o16b2o39b3o5bobo4bo3bo32b2ob2o6b4o9bo53bo2bo6b4o4b2o47bo3b
2obo59b4o2bo5b5o47b3o27b3o33b3o2bo12bobo5b2o57b2o28b3obobo30bobo38b2o
4bo2bo4bo18bo13b2o$3b2ob2o48bo2bo9b2o7b3o47bobob2o3bo8bo34bobo7b3o9bob
o36b2o15bobo8bo58bo2bo10b3o46bo4b2o4bobobo43b3o16bo15bobo32bo3b2o15bo
4b3o57b2o32bobo31b2o47bo20bobo14bobo$4bobo22bo29bo18b6o29b2o16b2o48bob
o22bo35bobo9b3o3bo57b2o9b3o10bo2bo47b4o2b2obo2b2o44bobo16b3o13bo2bo32b
2o18b2o2bobo31b2o57b2obo10b2o68bo22bo17bo$3b2ob2o19bobo28bo22b2obo6bo
21b2o7b3o57bo22bo37bo10bo63b2o22bob2o3bo44b2o55bo2bo11b3o4bo13bob2o32b
ob2o19b2o33bo23bo32bobobobo9bo15b2o49b2o41b2o$28b2o29b3o21bo6bobobob2o
24b6o75b2o3b2o38bo94bo58b3o15bo31bob2o13bo3bo14b2o33bo2bo51b3o25bo32bo
3b2o6b3o15bobo73bo$61bo27bob2ob2obo27b2obo6bo49bob2o19bobo36b3o6bobo
14b2o143bobo32b2o14bo2bo51b2o52bo25b3o44bo18bo73bobo$obo5bobo78bo37bo
6bobobob2o41b3ob2o21bo35bo2bo8bo3b2obo7bo54bo19bo59b2o9b2o252b2o52b2o
15bobo4b2o$b2o5b2o78b2o20bo22bob2ob2obo40bo27b2o34b4o4bob2o4bob2o8b3o
50bobo18bo59bobo117b2o142bo2bo50bo2bo21bo$111bo21bo49b3ob2o10bo47b2o4b
2ob2o18bo46b2obobo31bo35bob2o10bo76b2o40bo7bo132bo2bobo51b2o23b3o$109b
3o20b2o51b2o2bo10bo36b2o15bo67bobobobobo27bobo33b3obo11b2o40b2o32bobo
37b3o9bo130bo4bo70b2o7bo$188b2o8b3o36b2o83bo4bob2o28b2o32bo4bobo50bobo
10b2o20b2o38bo9b3o130bo40b2o33bo$323b3obo8b2o55b2o3b2obo49b2o6b2o2b2ob
o5b2o186bo10b3o36b2o28b2o4b3o$325bobo7bobo63bo57b2o3bobo5b2o15b2o167b
2o6bo53bo19b2o6bo$247bo10b2o66bo8bo15b2o48b2o51b2o10bo22bo170b2o5bo53b
o$246bobo9b2o74b2o14bo2bo2b2o96bo13bo21b3o166bo5b3o51b3o$242b2obobo
102bobo4bo97b3o34bo$241bobobobobo87b2o4bo7bo5bob2o96bo10bo$241bo4bobob
o86bo2bobobo9b2obobo106bo$242b3obobobo88b2ob2obo8bo2bo2bo98b2o3bobo5b
2o$244b2o3bo95bo5bo4bo2b2o98b2o2b2obo5b2o15bo$345b2o4b5o108b2o24bo$
488b3o$353b2obo$353bob2o!

[Sokwe]

Here is a first-draft of the complete list of nominees, although it has some issues that need to be addressed:

• #01 Walrus: The first known elementary c/8 diagonal spaceship (by Adam P. Goucher)
• #02 p24 gliderless LWSS gun: This represents the lowest known period for a gliderless LWSS gun. (by Matthias Merzenich, iNoMed, and Christopher D'Agostino)
• #03 (2,1)c/6 knightship tagalong: A surprisingly small tagalong given how long ago Sir Robin was discovered (by Darren Li)
• #04 Charity's p25: The first known strictly volatile period-25 oscillator (by Charity Engine)
• #05 Crotchet ship pseudo-Heisenburp: A nice contraption to detect the presence of certain types of c/3 spaceships (by David Bell)
• #06 p13 domino sparker: The first p13 domino sparker with enough clearance to be useful (by Mitchell Riley)
• #07 8-lane stable glider shifter: A useful conduit that shifts a glider onto another lane without affecting its colour (by Mitchell Riley)
• #08 Spacefiller synthesis: The first ever synthesis of a spacefiller (by Goldtiger997)
• #09 New oscillator discoveries: A continuing project to find new oscillators. In 2023, new oscillators were found for every period up to 94. (by David Raucci, Mitchell Riley, Luke Kiernan, iNoMed, Nico Brown, Carson Cheng, Matthias Merzenich, et al.)
• #10 New small guns: Various record-breaking engine-based glider guns, including periods 42, 49, 52, 59, 61, 68, 70, 72, 84, 126, and 201 (by Mitchell Riley, Carson Cheng, iNoMed, Nico Brown, and Matthias Merzenich )
• #11 Period-2^18 WireWorld metacell: A pattern that emulates a cell in the WireWorld rule (by blah)
• #12 New wickstretchers: More new types of wickstretchers were found in 2023 than in all past years combined, including three new speeds. This includes stretchers for new combinations of speed and wick, as well as improvements to existing types of stretchers. (by Keith Amling, Frank Everdij, Matthias Merzenich, and Hartmut Holzwart)
• #13 (34,7)c/156 Caterpillar: An engineered spaceship based on the (34,7)c/156 Herschel climber reaction (by Luka Okanishi)
• #14 Cribbage: The first period-19 oscillator to be discovered. It was one of the final two periods in the proof that Life is omniperiodic. (by Mitchell Riley)
• #15 p41 dependent reflector loop: The first period-41 oscillator to be discovered. It was one of the final two periods in the proof that Life is omniperiodic. (by Nico Brown)
• #16 Smaller solution to the Unique father problem: A 278-cell still life that satisfies the Unique father problem(by 400spartans)
• #17 Period-41 glider guns: The first guns of period 41. They were found one day after the discovery of the first period-41 oscillator.(by iNoMed, Matthias Merzenich, May13, David Raucci, and Nico Brown)
• #18 New stable pulse dividers: conduits that divide a glider stream by 5, 6, 11, 12, 6n+4, 6n+25 or 6n+26, and 6n+34 or 6n+35 (by Evin, Disaster16439, Louis-François Handfield, Entity Valkyrie, confocaloid)
• #19 New SKOPs: Many new record-breaking oscillators, including periods 12, 38, 49, 68, 76, and 384 and more (by Mitchell Riley, Nico Brown, Carson Cheng, iNoMed, et al.)
• #20 Glider-to-chaos converter: A stable "glider-to-chaos" mechanism that led to discoveries of several reflectors and glider-accepting conduits, including , G → B, G → H, G → P, G → R, G → Q, and G → U (by Mitchell Riley)
• #21 Ultra long-lived Engineered diehards: This year an explosion of diehard discoveries were made, culminating in a pattern that lives for 17^^^3 generations before dying out. (by Pavel Grankovsky, Adam P. Goucher, Tim Coe, toroidalet, EvinZL et al.)
• #22 1413-tick natural diehard: The longest-lived natural 16 × 16 diehard (by Charity Engine)
• #23 HBK caterpillar: Built on the half-bakery reaction, it's the fastest spaceship of its type, achieving a speed of (6,3)c/1024 (by FWKnightship)
• #24 Snark64: A 90° glider reflector that can be used to solve synchronization and glider color problems, as well as being a glider-emitting catalyst (by Carson Cheng)
• #25 G-to-LWSS: The smallest known stable glider to lightweight spaceship converter (by Luke Kiernan and Mitchell Riley)
• #26 Stable Storage Spaceship: The first known spaceship that purely consists of a glider hitting a stable constellation in at least one of its phases(by Goldtiger997)
• #27 Still life synthesis reductions: Optimizations to still life syntheses have led to the completion of the 11-in-5, 15-in-10, and 17-in-15 projects (by Alex Greason, Carson Cheng, Goldtiger997, May13, GUYTU6J, et al. )
• #28 Odd traffic stop: A p2 phase-shifting catalyst that enabled the discovery of multiple odd-period oscillators (by Nico Brown)
• #29 Cleaner Boojum reflector catalyst: By adding a catalyst to clean up the unwanted beehive in the boojum reflector, a series of useful G-to-X’s, including 180° glider reflectors with different timings, are discovered (by Luke Kiernan)
• #30 c/3 against-the-grain greyships: The first c/3 greyship that travels perpendicular to the direction of the stripes (by Keith Amling, Hartmut Holzwart, and Jason Summers)
• #31 Baitless G-to-pi converter: A rare glider catalyst without bait objects, it converts a glider directly into a pi-heptomino, and can be used as a small beehive stopper and in a period-36 glider/pi hassler (by Mitchell Riley)
• #32 Galumpher: A Spartan 180-degree 0hd reflector that is easier to construct than its alternative, the Jubjub reflector (by affamatodidio)
• #33 New c/4 diagonal technology: A significant expansion of medium-period c/4 diagonal technology, including new spaceships, puffers, and rakes of various periods. Of particular note is a period-8 backrake, the first rake to be found by a direct computer search. (by Keith Amling, David Bell, Dmitry Maitak, praosylen, Evin, and Matthias Merzenich)
• #34 Small spacefillers: Several new record-breaking Max predecessors (by Rocknlol)

The first issue is that there are no credits, nor is there a satisfying explainer post for the engineered diehard entry (#21). I would appreciate it if someone who knows more about this can compile the credits and make a brief explainer post like those seen for other entries in this thread.

The second issue is that the last two entries seem redundant, as they are covered by "The Great Oscillator Discovery Project". I think these entries should be removed.

Please comment if you see any errors or things that need improvement. Do not start a voting thread until these issues are resolved and a few days have passed to establish consensus on the final list.

Edit: added credits and link for engineered diehard entry and added Mitchell Riley to credits for G-to-LWSS

Edit 2: typo corrections

Edit 3: removed p41 pi hassler and engine-based oscillators entries (merged into new oscillator discoveries entry)

[Pavgran]

Ultra long-lived Engineered diehards
(by Pavel Grankovsky, Adam P. Goucher, Tim Coe, toroidalet, EvinZL et al.)

Starting from tetrational diehard design, a couple of significant improvements were made to lifespan of the diehard, along with a lot of micro-optimizations.

Improvements started with the idea of using a fuse to produce block deleters, rather than placing a fixed amount of them.

Code: Select all

#N Diehard fitting under area of 10000 with a lifespan of more than 121 ^^ 39
x = 111, y = 90, rule = LifeSuper
7.W7.4Q2.6Q4.2W17.8Q.Q$4.W.3W8.12Q2.W.W16.2Q.Q.Q4.3Q24.2M$3.6W9.2Q5.
2Q5.W.W18.Q3.2Q28.2M8.2Q4.3Q$3.3W.W14.Q10.2W8.2M13.2Q2.Q33.Q2.Q$4.W
16.2Q21.M12.Q39.2Q8.2Q$44.M.M6.M4.Q.Q.Q21.2M21.Q.Q$24.W20.2M6.2M29.2M
22.Q$24.2W14.O7.2M4.2M8.2M$24.2W12.O2.O6.2M4.3M7.2M21.2M8.M$25.W4.2Q
6.O2.O6.2M4.2M31.2M6.3M4.2M$3.W26.2Q7.O5.pA7.2M39.M7.2M$3.W40.pA.pA6.
M40.2M$3.W41.pA$23.2M17.pA5.pA50.2M7.3M$23.2M6.2O8.pA.pA3.pA.pA18.Q
30.2M6.M.M$30.O9.pA.pA5.pA3.2pA13.Q.Q37.M$33.O5.pA.pA3.pA6.2pA14.2Q
35.M.M.2M$26.M4.2O5.pA.pA3.pA.pA9.pA5.2Q22.2M19.2M.M$25.M11.pA.pA5.pA
9.pA.pA3.Q2.Q21.3M9.M7.M.M.M$25.M10.pA.pA17.pA.pA3.2Q20.3M10.M10.2M$
2.W.W30.pA.pA19.pA.pA24.M12.3M8.M$3W.W.2W26.pA.pA21.pA45.2M$3W3.W.2W
11.2M3.2M5.pA.pA6.2O5.2O4.pA27.3M17.M.M$W4.W2.2W14.M7.pA.pA7.2O5.O4.pA
.pA3.2pA21.M19.M$W3.2W3.W11.M5.M5.pA13.O.O5.pA4.pA.pA20.3M5.M10.2M$W.
W.2W3.2W11.2M.2M20.2O12.2pA13.2M12.2M$2W3.2W.3W12.M.M11.2O37.2M12.2M$
W2.3W2.W15.M5.2pA5.2O51.M14.M$.W.2W3.2W14.M5.2pA23.2M22.2M24.M$3.W5.W
45.M23.2M13.3M8.M$3W3.W.W34.M9.M.M13.2pA24.3M$W2.W3.2W.W30.M.M9.2M14.
pA.pA13.2S$5.W4.W10.2M4.2pA5.2M4.M.M27.2pA4.2M6.S.S$2W3.W.W14.M4.pA.pA
4.2M3.M2.M23.pA9.2M6.2S5.2M$4W.W4.W8.3M6.2pA10.M.M22.pA.pA13.S9.2M$W
4.W.W.W9.M21.M.M22.pA6.S6.S.S23.Q.Q$W3.W.W24.pA11.M28.S.S4.S.S12.2M
11.4Q$2.W.W3.W21.pA.pA39.S.S3.S.S13.2M9.Q.2Q$3.4W.2W16.O4.pA.pA39.S5.
S6.M18.Q4.Q$.W8.W14.2O5.pA.pA25.2S8.S5.S7.3M18.3Q.2Q$25.2O6.pA25.S.S
7.S.S3.S.S5.M7.2M13.3Q.Q$25.O32.S2.S.S6.S5.S6.2M6.2M12.Q3.2Q$43.pA5.
2pA7.2S2.2S3.S5.S33.Q.Q$20.O16.2pA3.pA.pA3.pA.pA4.O10.S.S3.S.S30.Q2.Q
.Q$10.2W8.3O8.2W4.2pA4.pA4.pA5.O.O10.S5.S7.M4.3Q17.Q.Q$9.W2.W10.O6.W
16.2pA6.O8.S5.S9.M.M$9.W2.W9.2O9.W29.S.S3.S.S7.M3.M$8.W4.W17.2W31.S5.
S9.3M8.3Q$8.W4.W13.2W22.2S8.S5.S10.2M3.2M$9.4W13.W23.S.S7.S.S3.S.S$8.
2W2.2W15.W19.S2.S.S6.S5.S$8.W4.W6.2W.2W2.2W12.2U6.2S2.2S3.S5.S$8.W4.W
6.W3.W16.2U14.S.S3.S.S$21.3W34.S5.S6.pA$3.W.W10.2W20.U16.S5.S8.pA.pA
25.2Q$3.2W4.4W3.2W19.U.U6.O7.S.S3.S.S8.pA25.Q2.Q$4.W5.2W9.3W14.U6.O.O
7.S5.S36.Q.Q$20.W3.W.2W7.U9.2O5.S5.S32.2M6.Q$20.2W.2W.2W6.U.U14.S.S3.
S.S23.2M6.2M$3.2W10.2W18.U16.S5.S18.S5.M$3.W10.W.W38.S15.2S4.3S4.3M$W
5.3W4.W.W26.2O10.S.S14.2S7.S5.M7.2M$W.W3.2W2.W.W.W20.U5.O9.S3.S10.S
12.2S13.2M9.Q2.Q.Q$2W6.2W3.W20.U.U7.O5.S.S13.3S37.Q.Q.Q$9.2W24.U6.2O
7.2S16.S21.2M14.Q$3.W6.2W20.U35.2S21.2M17.Q$3.W.W4.2W15.U3.U.U74.Q$3.
2W5.W7.M6.U2.U3.U3.2U8.2pA58.2Q2.Q$7.W9.M2.M4.U2.U7.U9.2pA57.3Q.2Q$7.
W.W4.2M.M2.M5.U10.3U12.pA7.2S5.Q37.2Q3.Q$7.2W6.M5.M17.U11.pA.pA5.S.S
4.Q.Q37.2Q.2Q$16.5M15.U.U13.pA6.S6.2Q38.Q$17.M.M.M14.2U11.pA8.2S45.3Q
2.Q$17.5M26.pA.pA54.2Q.Q.Q$18.M7.M22.pA$19.4M31.3U$20.M3.2M29.3U5.2M
7.3M$26.M36.2M9.M$27.M2.M15.pA27.M27.M5.M$28.M16.pA.pA2.3U14.2M4.M27.
3M4.2M$28.M17.pA4.3U13.2M31.2M.M2.M.M.M$100.2M5.2M.M$29.M.M70.M2.M.M.
2M$26.M.M2.M2.M11.3U16.M2.2M23.M8.4M.M$26.M3.M2.3M11.3U13.3M2.2M2.M
16.M.5M3.2M.2M2.2Q.Q$31.2M.M31.2M2.3M18.2M.2M4.M.2M.Q.2Q.Q$28.M.M2.4M
.M27.2M2.3M19.2M2.2M5.M5.Q$26.M.M.2M.M2.M.M3.3U21.2M6.M2.M9.2M2.2M.M
8.2M4.Q$27.5M11.3U21.M6.3M10.M3.2M.6M2.2M$28.2M3.4M.M49.M2.M3.5Q3.M!

(Initial idea by Pavel Grankovsky, fuse design by EvinZL, improvements by toroidalet and Adam P. Goucher)

Next, there's an idea of using gliders from the second sawtooth to ignite the fuse. That bumped the number of tetration levels to the exponential level.

Code: Select all

#N Diehard fitting under area of 10000 with a lifespan of more than 121 ^^ 5.94e54
x = 109, y = 91, rule = LifeSuper
19.6Q23.8Q.Q$17.10Q21.2Q.Q.Q4.3Q24.2M15.Q$19.2Q2.2Q26.Q3.2Q28.2M8.2Q
5.Q$41.2M13.2Q2.Q33.Q2.Q4.Q$42.M12.Q39.2Q8.2Q$42.M.M5.2M4.Q.Q.Q21.2M
21.Q.Q$43.2M7.M29.2M22.Q$46.2M5.M8.2M$37.3O6.2M5.M8.2M21.2M8.M$28.2Q
6.3O7.2M5.M31.2M6.3M4.2M$28.2Q13.pA8.M39.M7.2M$42.pA.pA5.2M40.2M$43.pA
$21.2M17.pA5.pA50.2M7.3M$21.2M6.O9.pA.pA3.pA.pA18.Q30.2M6.M.M$29.2O7.
pA.pA5.pA3.2pA13.Q.Q37.M$29.2O6.pA.pA3.pA6.2pA14.2Q35.M.M.2M$30.O5.pA
.pA3.pA.pA9.pA5.2Q20.M2.M19.2M.M$35.pA.pA5.pA9.pA.pA3.Q2.Q21.4M9.M6.M
.M.M$34.pA.pA17.pA.pA3.2Q19.M13.2M9.2M$33.pA.pA19.pA.pA24.2M2.2M8.2M
8.M$32.pA.pA21.pA45.2M$19.2M3.2M5.pA.pA6.2O5.2O4.pA28.2M17.M.M$19.2M
3.2M4.pA.pA7.2O5.O4.pA.pA3.2pA21.2M18.M$20.5M6.pA13.O.O5.pA4.pA.pA21.
2M4.2M10.2M$21.M.M21.2O12.2pA13.2M14.M$35.2O37.2M11.M$21.3M4.2pA5.2O
51.2M$28.2pA23.2M22.2M14.M8.3M$53.M23.2M13.M2.M$42.M8.M.M13.2pA23.M2.
M$40.M.M8.2M14.pA.pA13.2S9.M$19.2M4.2pA5.2M4.2M28.2pA4.2M6.S.S$20.M4.
pA.pA4.2M4.2M24.pA9.2M6.2S5.2M$17.3M6.2pA10.2M23.pA.pA13.S9.2M$17.M
22.M.M21.pA6.S6.S.S23.Q.Q$29.pA12.M27.S.S4.S.S12.2M11.4Q$28.pA.pA39.S
.S3.S.S13.2M9.Q.2Q$23.2O4.pA.pA39.S5.S6.M18.Q4.Q$25.O4.pA.pA25.2S8.S
5.S7.3M18.3Q.2Q$22.O8.pA25.S.S7.S.S3.S.S5.M7.2M13.3Q.Q$23.2O31.S2.S.S
6.S5.S6.2M6.2M12.Q3.2Q$41.pA5.2pA7.2S2.2S3.S5.S33.Q.Q$35.2pA3.pA.pA3.
pA.pA4.O10.S.S3.S.S12.Q17.Q2.Q.Q$35.2pA4.pA4.pA5.O.O10.S5.S13.Q18.Q.Q
$16.O28.2pA6.O8.S5.S9.3M4.Q$16.3O12.2A28.S.S3.S.S8.3M9.Q$19.O11.2A29.
S5.S8.M3.M8.Q$18.2O29.2S8.S5.S24.Q$.2W8.2W9.2A24.S.S7.S.S3.S.S9.2M3.
2M$5W6.2W8.A2.A8.2A12.S2.S.S6.S5.S$2W.2W16.A.A3.2A3.A.A5.2A5.2S2.2S3.
S5.S$5.3W14.A3.A.A3.A6.A.A13.S.S3.S.S$2W2.W3.W17.2A3.2A6.2A15.S5.S6.pA
$2.W2.W5.W3.2W.2W16.A16.S5.S8.pA.pA25.2Q$9.4W2.W3.W15.A.A6.O7.S.S3.S.
S8.pA25.Q2.Q$.4W3.W.3W3.3W17.A6.O.O7.S5.S36.Q.Q$.W5.W4.2W29.2O5.S5.S
32.2M6.Q$4.3W.2W21.U5.U11.S.S3.S.S23.2M6.2M$2W3.W2.W2.W4.3W3.2W6.U.U
3.U.U11.S5.S18.S5.M$W.3W3.2W.2W2.W3.W.W.W5.U.U5.U15.S15.2S4.3S4.3M$2W
2.2W.2W2.2W2.2W.2W.2W5.U.U21.S.S14.2S7.S5.M7.2M$W2.3W5.W17.U19.S3.S
10.S12.2S13.2M9.Q2.Q.Q$2W3.W2.2W3.W12.U5.U5.O9.S.S13.3S37.Q.Q.Q$W5.4W
15.U.U3.U.U4.2O9.2S16.S21.2M14.Q$2W.W5.W.W14.U5.U5.2O26.2S21.2M17.Q$W
3.W.2W3.W17.U9.O66.Q$.W7.2W5.M11.U.U13.2pA58.2Q2.Q$.3W.2W8.M2.M4.2U4.
U3.2U9.2pA57.3Q.2Q$3.W4.W3.2M.M2.M4.U.U7.U16.pA7.2S5.Q37.2Q3.Q$.2W2.W
3.W3.M5.M4.U.U7.3U12.pA.pA5.S.S4.Q.Q37.2Q.2Q$W.W2.3W6.5M6.2U9.U13.pA
6.S6.2Q38.Q$2W.3W.W7.M.M.M13.U.U11.pA8.2S45.3Q2.Q$2W.2W2.W.W5.5M13.2U
11.pA.pA54.2Q.Q.Q$16.M7.M6.2U14.pA5.U$17.4M8.U2.U19.U2.U11.M$18.M3.2M
5.2U21.U2.U5.2M3.M.M.2M$24.M6.4U19.U6.2M2.M.3M.2M24.M.M.M.M2.M$25.M2.
M.U.3U9.pA4.U16.6M27.M.2M2.2M$26.M16.pA.pA2.U2.U18.M31.2M2.M.M$26.M
17.pA3.U2.U45.M2.M.M5.M$50.U47.3M2.3M2.M$25.M10.2U.U5.U54.3M4.Q$22.2M
2.M.4M2.U9.U2.U15.M2.2M23.M7.4M4.2Q$22.M.M.M5.M.U2.U.U4.U2.U13.3M2.2M
2.M16.M.5M3.5M3.Q.2Q$24.2M2.M5.2U3.2U5.U17.2M2.3M18.2M.2M4.M.M.Q5.Q$
22.M5.M2.M2.U.3U2.U22.2M2.3M19.2M2.2M6.2Q$24.2M.2M2.M4.U.U2.U.U20.2M
6.M2.M9.2M2.2M.M8.M.Q.3Q$25.M.2M2.2M2U2.U.U2.U22.M6.3M10.M3.2M.6M2.M.
7Q$23.2M.M.M3.M2U.2U.3U.U42.M2.M3.5Q2.2M.2Q.Q$22.2M.M2.4M.U.U2.4U.2U!

(Initial idea by Adam P. Goucher, improvements by EvinZL, Pavel Grankovsky, toroidalet and May13)

Then, there's an idea of adding a fuse that would produce block deleters for the first sawtooth. That significantly bumps the exponential (number n in 121↑↑(10^n))

Code: Select all

#N Diehard fitting under area of 10000 with a lifespan of more than 121 ^^ 1.10e1046
x = 109, y = 91, rule = LifeSuper
18.8Q20.12Q4.5Q2.Q15.2M15.Q$19.Q4.Q22.Q3.2Q8.2Q.Q.4Q.Q13.2M8.2Q5.Q$
41.2M4.Q4.2Q9.4Q27.Q2.Q4.Q$42.M4.2Q46.2Q8.2Q$42.M.M8.Q3.M24.2M21.Q.Q$
43.2M3.Q.2Q.Q2.M25.2M22.Q$48.2Q6.3M3.2M$37.3O8.2Q12.2M21.2M8.M$28.2Q
6.3O46.2M6.3M4.2M$28.2Q13.pA9.3M36.M7.2M$42.pA.pA8.M38.2M$43.pA8.3M$
21.2M17.pA5.pA4.2pA7.2M35.2M7.3M$21.2M6.O9.pA.pA3.pA.pA4.2pA6.2M4.Q
30.2M6.M.M$29.2O7.pA.pA5.pA2.pA.pA13.Q.Q37.M$29.2O6.pA.pA3.pA22.2Q35.
M.M.2M$30.O5.pA.pA3.pA.pA6.pA2.pA5.2Q20.M2.M19.2M.M$35.pA.pA5.pA6.pA
2.pA.pA3.Q2.Q21.4M9.M6.M.M.M$34.pA.pA13.pA3.pA.pA3.2Q19.M13.2M9.2M$
33.pA.pA19.pA.pA24.2M2.2M8.2M8.M$32.pA.pA21.pA45.2M$19.2M3.2M5.pA.pA
6.2O5.2O4.pA28.2M17.M.M$19.2M3.2M4.pA.pA7.2O5.O4.pA.pA3.2pA21.2M18.M$
20.5M6.pA13.O.O5.pA4.pA.pA21.2M4.2M10.2M$21.M.M21.2O12.2pA13.2M14.M$
35.2O37.2M11.M$21.3M4.2pA5.2O51.2M$27.pA.pA23.2M22.2M14.M8.3M$27.2pA
24.M23.2M13.M2.M$42.M8.M.M13.2pA23.M2.M$40.M.M8.2M14.pA.pA13.2S9.M$
19.2M11.2M4.2M28.2pA4.2M6.S.S$20.M5.pA5.2M4.2M24.pA9.2M6.2S5.2M$17.3M
5.pA.pA10.2M23.pA.pA13.S9.2M$17.M8.pA.pA11.M.M11.2pA8.pA6.S6.S.S23.Q.
Q$27.pA.pA12.M10.pA.pA14.S.S4.S.S12.2M11.4Q$28.pA.pA22.pA16.S.S3.S.S
13.2M9.Q.2Q$23.2O4.pA.pA5.pA14.2pA17.S5.S6.M18.Q4.Q$25.O4.pA5.pA.pA6.
2pA11.2S8.S5.S7.3M18.3Q.2Q$22.O14.pA6.pA.pA10.S.S7.S.S3.S.S5.M7.2M13.
3Q.Q$23.2O19.2pA3.2pA5.S2.S.S6.S5.S6.2M6.2M12.Q3.2Q$30.pA10.pA6.pA.pA
5.2S2.2S3.S5.S33.Q.Q$29.pA.pA8.pA.pA5.2pA3.O10.S.S3.S.S12.Q17.Q2.Q.Q$
30.pA10.pA10.O.O10.S5.S13.Q18.Q.Q$16.O28.2pA6.O8.S5.S9.3M4.Q$16.3O26.
2pA14.S.S3.S.S8.3M9.Q$19.O21.A20.S5.S8.M3.M8.Q$18.2O20.A.A16.S5.S24.Q
$.2W8.2W9.2U17.2A15.S.S3.S.S9.2M3.2M$5W6.2W8.U2.U8.2U24.S5.S$2W.2W16.
U.U3.2U3.U.U21.S5.S$5.3W14.U3.U.U3.U22.S.S3.S.S7.S$2W2.W3.W17.2U3.2U
17.S5.S5.S7.S.S$2.W2.W5.W3.2W.2W16.U13.3S6.S11.2S23.2Q$9.4W2.W3.W15.U
.U6.O8.S4.S.S34.Q2.Q$.4W3.W.3W3.3W17.U6.O.O6.2S5.S36.Q.Q$.W5.W4.2W29.
2O11.S32.2M6.Q$4.3W.2W21.U5.U9.2S6.S.S23.2M6.2M$2W3.W2.W2.W4.3W3.2W6.
U.U3.U.U8.2S7.S19.pA4.M$W.3W3.2W.2W2.W3.W.W.W5.U.U5.U37.pA.pA4.3M$2W
2.2W.2W2.2W2.2W.2W.2W5.U.U45.pA7.M7.2M$W2.3W5.W17.U16.S45.2M9.Q2.Q.Q$
2W3.W2.2W3.W12.U5.U5.O6.S.S56.Q.Q.Q$W5.4W15.U.U3.U.U4.2O6.S9.2S4.S16.
2S8.2M14.Q$2W.W5.W.W14.U5.U5.2O3.3S9.S.S3.S2.S14.S.S7.2M17.Q$W3.W.2W
3.W17.U9.O3.S11.2S4.S2.S3.2S11.S24.Q$.W7.2W17.U.U16.2S.S12.S4.S12.S.S
20.2Q2.Q$.3W.2W8.M13.U3.2U13.3S2.3S.S2.S8.3S10.2S19.3Q.2Q$3.W4.W5.M2.
M4.2U9.U19.S2.2S2.S4.Q6.S30.2Q3.Q$.2W2.W3.W.2M.M2.M4.U.U9.3U6.2S4.S.
2S.S.S2.3S2.Q.Q4.2S31.2Q.2Q$W.W2.3W4.M5.M4.U.U10.U5.S3.2S.3S3.2S3.2S
2.2Q13.2S23.Q$2W.3W.W5.5M6.2U7.U.U9.3S.S10.S18.2S22.3Q2.Q$2W.2W2.W.W
4.M.M.M14.2U4.pA3.2S.3S2.S2.2S.S2.S.S40.2Q.Q.Q$14.5M12.2U5.pA.pA5.2S
5.S5.2S.S$15.M7.M5.U2.U6.pA6.S.2S.2S2.2S4.S5.M$16.4M9.2U5.pA10.S.2S6.
2S2.M4.M.M.2M$17.M3.2M12.pA.pA11.S2.S2.S3.S.2M2.M.3M.2M24.M.M.M.M2.M$
23.M12.pA9.2S3.3S5.2S5.6M27.M.2M2.2M$24.M2.M5.pA12.2S.5S.S.3S10.M31.
2M2.M.M$25.M6.pA.pA12.3S10.S.S34.M2.M.M5.M$25.M7.pA12.S4.S2.S2.2S3.S
35.3M2.3M2.M$40.S2.S2.S.S.S.S.S2.2S.2S38.3M4.Q$26.M9.2pA6.S4.S.S.S3.
2S.3S36.4M4.2Q$26.M.2M.M4.2pA2.3S4.S.2S.S3.S4.S6.M19.2M7.5M3.Q.2Q$25.
2M.M.M.2M8.S2.S.S.S5.S5.S5.2M.M17.2M8.M.M.Q5.Q$26.M.3M10.3S.S4.3S.2S
3.S.S5.M34.2Q$27.2M.M3.M5.2S5.S3.3S.S.S2.S.2S3.3M3.2M10.2M5.2M7.M.Q.
3Q$28.3M.2M6.2S2.2S2.S2.S.S3.S4.2S5.M.5M9.2M5.2M6.M.7Q$30.M11.2S.S7.S
3.S.S3.2S6.M3.M24.2M.2Q.Q$31.2M7.2S.S.2S.S.S.S.S.2S2.S.3S7.3M20.2Q$
32.M7.3S4.8S5.S.2S8.3M20.2Q!

(Initial idea by AlbertArmStain, first fitting design by May13, improvements by toroidalet, EvinZL and Adam P. Goucher )

After that, the idea of using a block pull rather than glider salvo to ignite the second sawtooth's fuse allows for doubly-exponential number of tetrations.

Code: Select all

#N Diehard fitting under area of 10000 with a lifespan of more than 121 ^^ (121 ^ 8.46e1059)
x = 108, y = 91, rule = LifeSuper
17.8Q20.12Q4.5Q2.Q15.2M15.Q$18.Q4.Q22.Q3.2Q8.2Q.Q.4Q.Q13.2M8.2Q5.Q$
40.2M4.Q4.2Q9.4Q27.Q2.Q4.Q$41.M4.2Q46.2Q8.2Q$41.M.M8.Q3.M24.2M21.Q.Q$
42.2M3.Q.2Q.Q2.M25.2M22.Q$47.2Q6.3M3.2M$36.3O8.2Q12.2M21.2M8.M$27.2Q
6.3O46.2M6.3M4.2M$27.2Q13.pA9.3M36.M7.2M$41.pA.pA8.M38.2M$42.pA8.3M$
20.2M17.pA5.pA4.2pA7.2M35.2M7.3M$20.2M6.O9.pA.pA3.pA.pA4.2pA6.2M4.Q
30.2M6.M.M$28.2O7.pA.pA5.pA2.pA.pA13.Q.Q37.M$28.2O6.pA.pA3.pA22.2Q35.
M.M.2M$29.O5.pA.pA3.pA.pA6.pA2.pA5.2Q20.M2.M19.2M.M$34.pA.pA5.pA6.pA
2.pA.pA3.Q2.Q21.4M9.M6.M.M.M$33.pA.pA13.pA3.pA.pA3.2Q19.M13.2M9.2M$
32.pA.pA19.pA.pA24.2M2.2M8.2M8.M$31.pA.pA21.pA45.2M$18.2M3.2M5.pA.pA
6.2O5.2O4.pA28.2M17.M.M$18.2M3.2M4.pA.pA7.2O5.O4.pA.pA3.2pA21.2M18.M$
19.5M6.pA13.O.O5.pA4.pA.pA21.2M4.2M10.2M$20.M.M21.2O12.2pA13.2M14.M$
34.2O37.2M11.M$20.3M4.2pA5.2O51.2M$26.pA.pA23.2M22.2M14.M8.3M$26.2pA
24.M23.2M13.M2.M$41.M8.M.M13.2pA23.M2.M$39.M.M8.2M14.pA.pA13.2S9.M$
18.2M11.2M4.2M28.2pA4.2M6.S.S$19.M5.pA5.2M4.2M24.pA9.2M6.2S5.2M$16.3M
5.pA.pA10.2M23.pA.pA13.S9.2M$16.M8.pA.pA11.M.M11.2pA8.pA6.S6.S.S23.Q.
Q$26.pA.pA12.M10.pA.pA14.S.S4.S.S12.2M11.4Q$27.pA.pA22.pA16.S.S3.S.S
13.2M9.Q.2Q$22.2O4.pA.pA5.pA14.2pA17.S5.S6.M18.Q4.Q$24.O4.pA5.pA.pA6.
2pA11.2S8.S5.S7.3M18.3Q.2Q$21.O14.pA6.pA.pA10.S.S7.S.S3.S.S5.M7.2M13.
3Q.Q$22.2O19.2pA3.2pA5.S2.S.S6.S5.S6.2M6.2M12.Q3.2Q$29.pA10.pA6.pA.pA
5.2S2.2S3.S5.S33.Q.Q$28.pA.pA8.pA.pA5.2pA3.O10.S.S3.S.S12.Q17.Q2.Q.Q$
29.pA10.pA10.O.O10.S5.S13.Q18.Q.Q$15.O28.2pA6.O8.S5.S9.3M4.Q$15.3O26.
2pA14.S.S3.S.S8.3M9.Q$18.O21.pA20.S5.S8.M3.M8.Q$17.2O20.pA.pA16.S5.S
24.Q$40.2pA15.S.S3.S.S9.2M3.2M$5.W26.2U24.S5.S$3.2W21.2U3.U.U21.S5.S$
4.2W19.U.U3.U22.S.S3.S.S7.S$25.2U3.2U17.S5.S5.S7.S.S$14.2W.2W.2W13.U
13.3S6.S11.2S23.2Q$4.2W8.2W.2W.W.W11.U.U6.O8.S4.S.S34.Q2.Q$3.4W.W12.W
13.U6.O.O6.2S5.S36.Q.Q$.W4.2W34.2O11.S17.pA14.2M6.Q$W6.W.W3.2W15.U5.U
9.2S6.S.S15.pA.pA5.2M6.2M$3W5.2W2.W.W14.U.U3.U.U8.2S7.S17.pA.pA4.M$8.
2W3.W14.U.U5.U37.pA.pA4.3M$4.W22.U.U45.pA7.M7.2M$3.W7.W16.U16.S45.2M
9.Q2.Q.Q$3.3W4.2W13.U5.U5.O6.S.S56.Q.Q.Q$8.W15.U.U3.U.U4.2O6.S9.2S4.S
16.2S8.2M14.Q$7.W17.U5.U5.2O3.3S9.S.S3.S2.S14.S.S7.2M17.Q$7.3W18.U9.O
3.S11.2S4.S2.S3.2S11.S24.Q$27.U.U16.2S.S12.S4.S12.S.S20.2Q2.Q$14.M13.
U3.2U13.3S2.3S.S2.S8.3S10.2S19.3Q.2Q$13.M2.M4.2U9.U19.S2.2S2.S4.Q6.S
30.2Q3.Q$10.2M.M2.M4.U.U9.3U6.2S4.S.2S.S.S2.3S2.Q.Q4.2S31.2Q.2Q$11.M
5.M4.U.U10.U5.S3.2S.3S3.2S3.2S2.2Q13.2S23.Q$12.5M6.2U7.U.U9.3S.S10.S
18.2S22.3Q2.Q$13.M.M.M14.2U4.pA3.2S.3S2.S2.2S.S2.S.S40.2Q.Q.Q$13.5M
12.2U5.pA.pA5.2S5.S5.2S.S$14.M7.M5.U2.U6.pA6.S.2S.2S2.2S4.S5.M$15.4M
9.2U5.pA10.S.2S6.2S2.M4.M.M.2M$16.M3.2M12.pA.pA11.S2.S2.S3.S.2M2.M.3M
.2M24.M.M.M.M2.M$22.M12.pA9.2S3.3S5.2S5.6M27.M.2M2.2M$23.M2.M5.pA12.
2S.5S.S.3S10.M31.2M2.M.M$24.M6.pA.pA12.3S10.S.S34.M2.M.M5.M$24.M7.pA
12.S4.S2.S2.2S3.S35.3M2.3M2.M$39.S2.S2.S.S.S.S.S2.2S.2S38.3M4.Q$25.M
9.2pA6.S4.S.S.S3.2S.3S36.4M4.2Q$25.M.2M.M4.2pA2.3S4.S.2S.S3.S4.S6.M
19.2M7.5M3.Q.2Q$24.2M.M.M.2M8.S2.S.S.S5.S5.S5.2M.M17.2M8.M.M.Q5.Q$25.
M.3M10.3S.S4.3S.2S3.S.S5.M34.2Q$26.2M.M3.M5.2S5.S3.3S.S.S2.S.2S3.3M3.
2M10.2M5.2M7.M.Q.3Q$27.3M.2M6.2S2.2S2.S2.S.S3.S4.2S5.M.5M9.2M5.2M6.M.
7Q$29.M11.2S.S7.S3.S.S3.2S6.M3.M24.2M.2Q.Q$30.2M7.2S.S.2S.S.S.S.S.2S
2.S.3S7.3M20.2Q$31.M7.3S4.8S5.S.2S8.3M20.2Q!

(Initial idea by Tim Coe, improvement by b3s23love)

The next natural idea is to do the same with the first sawtooth's fuse. With better fuse igniters, the number of tetrational levels becomes itself tetrational, and we step a little bit into the pentation level (although it isn't a true pentation, as we can't increase it's level, only the base).
At this point, it's a game of delaying fuse ignitions as much as possible. To that end, an idea of igniting the first fuse after it makes several block pulls comes handy.

Code: Select all

#N Diehard fitting under area of 10000 with a lifespan of more than 11^^^3
x = 112, y = 89, rule = LifeSuper
21.8Q20.12Q4.5Q2.Q15.2M15.Q$22.Q4.Q22.Q3.2Q8.2Q.Q.4Q.Q13.2M8.2Q5.Q$
44.2M4.Q4.2Q9.4Q27.Q2.Q4.Q$45.M4.2Q46.2Q8.2Q$45.M.M8.Q3.M24.2M21.Q.Q$
46.2M3.Q.2Q.Q2.M25.2M22.Q$51.2Q6.3M3.2M$40.3O8.2Q12.2M21.2M8.M$31.2Q
6.3O46.2M6.3M4.2M$31.2Q13.pA9.3M36.M7.2M$45.pA.pA8.M38.2M$46.pA8.3M$
24.2M11.pA11.pA4.2pA7.2M35.2M7.3M$24.2M6.O3.pA.pA9.pA.pA4.2pA6.2M4.Q
30.2M6.M.M$32.2O3.pA11.pA2.pA.pA13.Q.Q37.M$32.2O6.pA5.pA22.2Q35.M.M.
2M$33.O5.pA.pA3.pA.pA5.pA3.pA5.2Q20.M2.M19.2M.M$40.pA5.pA6.pA2.pA.pA
3.Q2.Q21.4M9.M6.M.M.M$37.pA5.pA10.pA2.pA.pA3.2Q19.M13.2M9.2M$36.pA.pA
3.pA.pA13.pA.pA24.2M2.2M8.2M8.M$37.pA5.pA3.2pA2.2pA6.pA45.2M$22.2M3.
2M11.pA6.pA.pA2.pA3.pA28.2M17.M.M$22.2M3.2M4.2pA4.pA.pA7.pA.pA3.pA.pA
3.2pA21.2M18.M$23.5M5.2pA5.pA8.2pA5.pA4.pA.pA21.2M4.2M10.2M$24.M.M10.
pA24.2pA13.2M14.M$36.pA.pA4.2Q32.2M11.M$24.3M4.2pA4.pA5.2Q46.2M$13.2O
.2O12.pA.pA23.2M22.2M14.M8.3M$13.2O.O.O11.2pA24.M23.2M13.M2.M$18.O26.
M8.M.M13.2pA23.M2.M$18.2O23.M.M8.2M14.pA.pA13.2S9.M$14.2O6.2M5.pA5.2M
4.2M28.2pA4.2M6.S.S$14.2O7.M4.pA.pA4.2M4.2M24.pA9.2M6.2S5.2M$20.3M6.pA
11.2M23.pA.pA13.S9.2M$20.M5.pA5.pA10.M.M11.2pA8.pA6.S6.S.S23.Q.Q$25.pA
.pA3.pA.pA11.M10.pA.pA14.S.S4.S.S12.2M11.4Q$26.pA5.pA.pA21.pA5.pA10.S
.S3.S.S13.2M9.Q.2Q$29.pA3.pA6.pA14.2pA4.pA.pA10.S5.S6.M18.Q4.Q$28.pA.
pA8.pA.pA20.pA8.S5.S7.3M18.3Q.2Q$29.pA10.pA3.2pA13.pA10.S.S3.S.S5.M7.
2M13.3Q.Q$46.pA5.2pA4.pA.pA10.S5.S6.2M6.2M12.Q3.2Q$7.O15.2W18.pA8.2pA
5.pA.pA6.S5.S33.Q.Q$6.O.O14.2W19.2pA10.O3.pA.pA4.S.S3.S.S12.Q17.Q2.Q.
Q$6.O.3O22.W21.O.O3.pA6.S5.S13.Q18.Q.Q$7.O3.O14.2W4.W.W21.O8.S5.S9.3M
4.Q$8.O.O8.2W5.W.W4.2W4.2pA23.S.S3.S.S8.3M9.Q$6.O.O.2O7.2W7.W10.2pA
24.S5.S8.M3.M8.Q$6.2O19.W.2W21.2S8.S5.S24.Q$22.2W4.W2.W4.2U15.S7.S.S
3.S.S9.2M3.2M$12.2W3.W4.W.W4.2W4.U.U15.S.S6.S5.S$12.2W2.W.W5.W10.2U5.
2U10.2S3.S5.S$16.W.W4.W.2W16.U4.2U8.S.S3.S.S$15.2W.2W4.W2.W5.U6.3U3.
3U.U8.S5.S7.pA$13.W2.W3.W4.2W5.U.U5.U4.U5.U4.S5.S9.pA.pA24.2Q$2.W.W.W
2.W2.W3.W3.W12.U11.U2.3U4.S.S3.S.S9.pA.pA22.Q2.Q$3.2W4.W.W5.2W.W.2W6.
U5.2U4.2U.U.U8.S5.S4.2S5.pA.pA22.Q.Q$4W2.W.2W2.W.W4.W.W.W5.U.U3.U2.U
3.U2.U.2U10.S7.S3.S3.pA.pA14.2M6.Q$7.2W3.3W4.W.W8.U5.2U5.2U13.S.S4.S.
S2.S.S3.pA.pA5.2M6.2M$2W.W2.W2.2W2.W.2W3.2W5.U5.U25.S4.S.S4.2S4.pA.pA
4.M$.2W.W4.2W3.2W10.U.U3.U.U20.S8.2S12.pA.pA4.3M$.2W.W.2W2.W2.W2.W10.
U5.U12.O7.S.S22.pA.pA5.M7.2M$W12.W2.W.W4.2U5.U14.O.O7.S24.pA14.2M9.Q
2.Q.Q$2W2.W.3W.W2.W8.U2.U3.U.U14.O5.S5.S48.Q.Q.Q$W2.W.2W4.W2.W3.W3.U.
U.U3.U3.2U4.O2.O7.S.S3.S.S32.2M14.Q$3W2.W5.2W.2W.3W3.U2.U7.U5.4O8.S5.
S3.2S6.2S11.2S7.2M17.Q$W4.3W2.2W14.2U7.3U11.S5.S6.S6.S2.S10.S.S23.Q$
2W4.W.W3.2W16.U6.U2.2O6.S.S3.S.S6.3S4.2S.S11.S21.2Q2.Q$.2W.W2.2W3.2W
3.4M8.U.U9.O7.S5.S9.S7.S11.S.S18.3Q.2Q$2W2.W2.W2.W2.W.2M4.2M7.U8.O6.S
5.S15.Q4.3S10.2S18.2Q3.Q$3W4.W4.2W.2M5.M4.U7.2O2.2O4.S.S3.S.S13.Q.Q6.
S30.2Q.2Q$2W9.3W3.2M.M.M3.U.U4.3O.O.O6.S5.S9.2U3.2Q6.2S30.Q$.W3.3W5.W
8.M4.U4.O4.O.O3.S5.S12.U43.3Q2.Q$4.W13.M3.M8.O.4O.O3.S.S3.S.S9.U.U43.
2Q.Q.Q$18.M4.M7.O4.O6.S5.S9.U.U$20.3M3.M3.2O.2O.O9.S12.2U9.M$20.2M4.M
5.O2.O3.2S4.S.S9.2U5.2M3.M.M.2M$26.2M4.O.O4.S2.S3.S9.U.U5.2M2.M.3M.2M
24.M.M.M.M2.M$28.M4.O6.3S14.U11.6M27.M.2M2.2M$28.3M12.2S6.U2.U5.U12.M
31.2M2.M.M$34.M7.S2.S7.2U2.U3.2U3.U33.M2.M.M5.M$32.M9.S.S6.2U.U.U.U3.
U2.U35.3M2.3M2.M$28.M4.4M6.S4.U2.6U.U2.U3.U2.M5.M.M.2M23.3M4.Q$30.M.M
16.2U3.2U6.2U2.U.5M.M2.3M14.M7.4M4.2Q$30.2M5.M14.4U2.4U.U8.M3.2M12.M.
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.2Q.Q!

(Fuse igniters by Tim Coe, improvements by EvinZL, toroidalet, b3s23love, Adam P. Goucher)

Now, increasing a lifespan becomes very hard. Reworking the shutdown sequence to make it more compact allowed to add a few more second fuse block deleters. In addition to that, the number of loaves (that controls the number at the very top of exponential tower: n in 121^^(121^...^121^n)) was increased by new gun startup sequence and a few glider delayers.

Code: Select all

#N Diehard fitting under area of 10000 with a lifespan of more than 17^^^3
x = 116, y = 86, rule = LifeSuper
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(Gun startup and shutdown sequence by Tim Coe, small glider generator by Dean Hickerson, improvements by toroidalet, Adam P. Goucher, b3s23love, EvinZL)

__________________________________________________________________________________________________
I hope I didn't miss anyone contributing.
I believe all the diehards in the post work. I checked that some major parts worked (startup, fuse ignitions, block delayers, shutdown) for some of them, but I didn't make a full check for all of them.

[Anivec]

• #25 G-to-LWSS: The smallest known stable glider to lightweight spaceship converter (by Luke Kiernan)

I'd like to note that the initial G-to-W was found by Mitchell Riley. I'd also suggest merging all of the conduits into one.

[Sokwe]

Ultra long-lived Engineered diehards

I'd like to note that the initial G-to-W was found by Mitchell Riley.

Thanks! I've added these details to the above list. I am wondering if anyone has thoughts on removing the last two entries for redundancy. It seems especially that the engine-based oscillators entry overlaps almost completely with the great oscillator discovery project.

I'd also suggest merging all of the conduits into one.

They're quite different and serve different purposes. I'm inclined to leave them separate.

[dvgrn]

Thanks! I've added these details to the above list. I am wondering if anyone has thoughts on removing the last two entries for redundancy. It seems especially that the engine-based oscillators entry overlaps almost completely with the great oscillator discovery project.

I'm always a little nervous about combining entries -- sometimes it seems like lots of separate discoveries that deserve to get separate attention end up merged into one big featureless mass of a combined nomination.

In this case, I do think that those last two entries would be better off being combined with each other -- but maybe not with the Great Oscillator Discovery Project, which could maybe have the word "omniperiodicity" somewhere in the description. (?)

It seems like those last two entries are both attempts to call out a distinct type of discovery. Omniperiodicity was proven with some significant reliance on dependent reflectors, and dependent reflector loops with a lot of other periods were discovered -- but then there were also these other engine-based discoveries that managed to hit some of those same difficult periods (like 41) without using dependent reflectors.

I'd also suggest merging all of the conduits into one.

They're quite different and serve different purposes. I'm inclined to leave them separate.

Yup, that would be an example of the kind of merging that I'm wary of. I'd also like to leave those entries separate.

[Sokwe]

the Great Oscillator Discovery Project, which could maybe have the word "omniperiodicity" somewhere in the description. (?)

Omniperiodicity is covered by the p19 and p41 entries (#14 and #15, respectively). To mention it in the Great Oscillator Discovery Project feels like double-dipping on that result.

Omniperiodicity was proven with some significant reliance on dependent reflectors, and dependent reflector loops with a lot of other periods were discovered -- but then there were also these other engine-based discoveries that managed to hit some of those same difficult periods (like 41) without using dependent reflectors.

The vast majority of the oscillators found in the Great Oscillator Discovery Project in 2023 were engine-based. If any subset of that project were to get a separate entry, I think it should be the dependent reflectors, since they represent a huge expansion on an idea that previously had very few examples.

[wildmyron]

• #15 p41 dependent reflector loop: The first period-19 oscillator to be discovered. It was one of the final two periods in the proof that Life is Omniperiodic. (by Nico Brown)

Typo, should say: "period-41 oscillator"

[confocaloid]

• #09 The Great Oscillator Discovery Project: A continuing project to find new oscillators. In 2023, new oscillators were found for every period up to 94. (by David Raucci, Mitchell Riley, Luke Kiernan, iNoMed, Nico Brown, Carson Cheng, Matthias Merzenich, et al.)

I'm not sure if the various efforts to find new oscillators can be considered a single "project". That title feels misleading to me, as it suggests that it was something that is carefully orchestrated. While in reality, it is basically enthusiasm and efforts by different people, using different ideas/tools/techniques.

I suggest this rewording:
"#09 New oscillator discoveries: continuing efforts to find new oscillators. In 2023, [...]"

I support merging entries #35 and #36 into the same entry (#09).

[Anivec]

Ultra long-lived Engineered diehards

Thanks! I've added these details to the above list. I am wondering if anyone has thoughts on removing the last two entries for redundancy.

It seems the “/color” command hasn’t been removed from the Engineered Diehard on the list yet. I think you can merge the last two into The Great Oscillator Discovery Project.

[Sokwe]

I'm not sure if the various efforts to find new oscillators can be considered a single "project". That title feels misleading to me, as it suggests that it was something that is carefully orchestrated. While in reality, it is basically enthusiasm and efforts by different people, using different ideas/tools/techniques.

It's what we called the equivalent entry last year, but I'm fine with changing it to "New Oscillator Discoveries". I'll change it as long as there are no objections.

I seem to see more support for merger of the last to entries into the oscillator entry than I see opposition, so I will likely merge them. Should the dependent reflector loops be split into their own entry?

[dvgrn]

I seem to see more support for merger of the last to entries into the oscillator entry than I see opposition, so I will likely merge them. Should the dependent reflector loops be split into their own entry?

The surge in dependent-reflector-loop discoveries was definitely an interesting thing. It's maybe not immediately clear if a separate entry is needed for them. Reading back...

Back in January more than one person was in favor of keeping a separate entry for the p41 dependent reflector loop -- Haycat2009 asked if it should be merged, and Sokwe and confocaloid both stated a preference for a separate entry, with (I think) nobody being particularly in favor of merging.

How about rewording #15 so that it still mentions the p41 dependent reflector being the penultimate period to be discovered in the omniperiodicity case bash -- but also mentions/links to the many other new dependent reflector loop periods found in 2023?

[confocaloid]

[...] Back in January more than one person was in favor of keeping a separate entry for the p41 dependent reflector loop -- [...]

[...] In the table, the SKOP entries except for new periods are merged (except for the new periods, which remain separate), [...]

My reason to prefer a separate entry for 208P41 is the same as for cribbage. Each of the two oscillators "solves" a new period, settling existence of oscillators of that period. Each new discovered period is an event.

[...] How about rewording #15 [...]

I think the two entries #14 (the first p19) and #15 (the first p41) should be kept as they are, without extending or merging either of them. There is symmetry between the two entries for the last two periods to be found. Adding links to other periods or other ideas would break that symmetry, and would otherwise be a significant change to the meaning of an entry.

[...] Should the dependent reflector loops be split into their own entry?

I like the idea to split the dependent reflector based oscillators into a separate entry. Those are a different type of oscillators and there were efforts to find such oscillators. (Those oscillators involve glider tracks and can be reconfigured geometrically. And yet those oscillators also involve oscillator engines that determine the resulting period.)

Alternatively, one could keep those oscillators as part of the entry #09 (new oscillator discoveries), and expand the description of the entry to mention efforts to find oscillators of specific types.

[Sokwe]

How about rewording #15 so that it still mentions the p41 dependent reflector being the penultimate period to be discovered in the omniperiodicity case bash -- but also mentions/links to the many other new dependent reflector loop periods found in 2023?

Like confocaloid said, I wanted there to be symmetry between the p19 and p41 entries. That's why I changed their descriptions to be identical except for the period.

If a dependent reflector loop entry were created, we would need a post containing just those loops found in 2023. That should be easy enough to make using Entity Valkyrie's stamp collection and/or the dependent reflector wiki page. However I would rather not do it myself, and if it were left to me to make such a collection, I would simply not make a separate entry.

[dvgrn]

If a dependent reflector loop entry were created, we would need a post containing just those loops found in 2023. That should be easy enough to make using Entity Valkyrie's stamp collection and/or the dependent reflector wiki page. However I would rather not do it myself, and if it were left to me to make such a collection, I would simply not make a separate entry.

Just for the record, I'm also unlikely to make a new separate entry for dependent reflectors. It seems kind of like a new nomination, and it seems kind of late in the year to be adding more of those.

So ... if it was partly my idea to have a separate dependent-reflector entry ... then I hereby un-nominate that idea. I have no objection if somebody else wants to pick it up and do something with it, of course -- but it would also be good to get to the point where the voting thread could be created.

[Sokwe]

I've edit the list to remove the p41 pi-heptomino hassler and the new engine based oscillators, merged into the now renamed "new oscillator discoveries" entry. I consider all clear objections to be addressed. If anyone wants a separate entry for dependent reflector loops, please speak up now and preferably make a post containing those examples found in 2023.

If there are no objections over the next 7 days, I think we should consider this list finalized. If you see any issues with the current list, please point them out.

Last year we used a 5-star voting system, rather than the 3-star system used in earlier years. Should we stick with 5 stars, switch back to 3 stars, or do something different?