OCA Discovery of the Year

The OCA Discovery of the Year (OCADOTY) competition is held each year on the ConwayLife.com forums as a counterpart to Pattern of the Year dedicated to rules other than Conway's Game of Life. Users are invited to submit interesting and noteworthy patterns, rules, families of rules, or projects relating to other cellular automata, their own or others'; following discussion, a final list is then curated, and a public vote held. All entries must have been found during the year in question.

Results by year

2023

Entries • Voting • Results

The OCA Discovery of the Year competition for 2023 was organized by Cyclotrons and NimbleRogue. Voting ended on October 1, 2024.

Final rank	Stars	Pattern/Discovery	Author(s)	Link(s)
Description
1	35	The slowest 1-cell ship with a period over 10^^(10^^27) and uses 3 states	toroidalet	[1]
The patterns involves 2 binary counters with the first counting down 27 times, (each countdown exponentially increasing the binary counters length) and then sends a signal to the second counter which begins to retract it. This cycle repeats with each 27 cycles of the first counter counting the second counter down by 1. (by toroidalet)
2	34	A 3-state rule with a SMOSMOSMOSMOS	FWKnightship	[2]
This beats the previous record level of SMOS iteration by 2. Also, the SMOSMOSMOSMOS has a generation where you can see each of the smaller ships it is composed by, not just the SMOSMOSMOS. (by FWKnightship)
3	32	a methuselah with a lifespan around 10^28,049,842	toroidalet	[3]
It is a failed Fibonacci counter, and it counts to the 134,217,726th Fibonacci number before breaking. (by toroidalet)
4	30	The highest known period of nonadjustable INT ship	NimbleRogue	[4]
This ship is over 17 times the period of the highest known period of nonadjustable INT ship which is dani's already crazy 6803c/403,840 diagonal spaceship, with a period of 729c/7,229,407o. Furthermore, the rulespace has many high-period ships with some having periods over 100,000. (by NimbleRogue)
=5	28	Many oblique ships in Glimmering Garden	GUYTU6J	[5]
They are made out oscillators that when hit by t-ships can be made to move, and or to shoot out t-ships. (by GUYTU6J)
=5	28	SoManyShips2	FWKnightship	[6]
a 3-state rule with 2 failed replicator oscillators (one OMOS), a 4c/9 replicator, and over fifty small ships and several families of extensible ones. (by FWKnightship)
7	26	A tiny computer called LEAST in Semaphore	_zM	[7]
it has 128 bits, and fits in a 98*62 bounding box. (by _zM)
=8	25	Various spaceships in Life-like cellular automata	many	[8]
This includes many oblique, orthogonal, and diagonal ships. There also was some higher period ships, and ships with a reduced speed over c/2. (by many)
=8	25	Spaceships in harvest moon	FWKnightship	[9] [10] [11] [12] [13] [14]
These are made using a diverse set of tools, including corderizing a rake, a caterpillar, from a helix, replicator manipulation, and from a engineered set of still live that when hit by a glider move forward, and then shoots a glider. (by FWKnightship)
=8	25	The completion of the 'sweet revenge' trilogy	b3s23love	[15]
These feature ships shaped like eater1, eater2, and eater3 in life being eaten by a glider shaped still life. (by b3s23love)
11	24	A p661 in B356/S23	FWKnightship	[16]
High period, non period multiplied natural oscillators are extremely rare in lifelike rules. This oscillator is also statorless, and a prime period. (by FWKnightship)
=12	23	A 3-engine corderization of an OT giraffepuffer	AbhpzTa	[17]
The original (2,8)c/181 puffer was found by David Epstein. This rule is explosive, making this corderization even more unlikly. (by AbhpzTa)
=12	23	Progress on the 5s project	many	[18]
Hundreds of thousands of 5s ships were found, by many, and LaundryPizza started work on the B0 5s database. (by many)
=12	23	New small adjustable spaceships	Ampere	[19]
This includes a bunch of 3-cell adjustable ships by Ampere that end up covering all speeds nc/m where n is 1, or 2 and m is above a small threshold. (by Ampere)
=12	23	A rule	snowman	[20]
The rule has a c/3o, c/21o, 2c/44d, c/24d, 2c/50d, and a 7c/347d, without having any of S0123. (by snowman)
=12	23	An 8c/187 engineered spaceshipin tLife.	toroidalet	[21]
The ship involves 4 8c/187o reactions that shoot gliders and t-ships between each other to make everything work. (by toroidalet)
=12	23	A failed loop replicator in INT	NimbleRogue	[22]
This reploop grows in a sporadic way while keeping the internal reploop structure for a long time. It forms a left aligned staircase of length 1, then 2, then 3, then 4 before breaking. (by NimbleRogue)
=18	22	Guns in many Life-like rules, including a Hashlife-friendly gun in 2x2	many	[23] [24]
There was a set of small moon guns by AlephAlpha, and an engineered adjustable gun by Naszvadi. The 2x2 gun consists of 3 huge Margolus oscillators that have colliding sparks. (by many)
=18	22	The first odd period oscillator in Diamoeba	bibunsekibun	[25]
This rule has a lot of p2 mechanics making an odd period oscillator extremely rare. (by bibunsekibun)
=18	22	A rule with 25 orthogonal velocities	May13	[26]
This is the record for most non-period adjustable ship speeds in an INT rule. (by May13)
=18	22	Similar constructions in B3-ckq5y/S2-ci3-aek4ci5c and B35e/S2-i36c	GUYTU6J and Anivec	[27] [28]
Both rules contain self-repairing OMOSes made from small ships Those OMOS can be used to make adjustable SMOSes. (by GUYTU6J, and Anivec)
=18	22	Spiralmakers in Flow6 and A Wire-like World (1e2-a3-cij4aijkrtz5cnqr/2ce3aejnr4aj5y6a/3	Redstoneboi and silversmith	[29] [30]
They both involve similar methods of sending a signal back and forth on the edge of the spiral to get each new spiral arm to be bigger then the last. (by Redstoneboi and silversmith)
23	21	Hexogen	Yoel	[31]
a self-complementary hexagonal rule with guns. (by Yoel)
=24	20	Omniperiodicity proofs in many Life-like rules	many	[32]
Many of these used Omniperiodicity based on XOR replicators, and signal loops. (by many)
=24	20	Various new oscillators in Life-like rules, including oscillators in Seeds, and a replicator shuttle in B37/S345	many	[33] [34]
amling found a p5 oscillator, that is also a wick, which is incredibly unlikely given how explosive seeds is. (by many)
=24	20	A new largest FIGseed	bibunsekibun	[35]
with a FIG value of over 379 million. The FIG value of a soup is calculated as FinalPop/InitialPop/Generations. The pattern keeps on almost forming squares, but whenever 2 matching edges meet they will form a replicator that travels on it's edge leading to more growth. (by bibunsekibun)
=27	19	531-generation A 1-cell methuselah in a 2-state rule	toroidalet	[36]
The mechanics of this are really interesting because the pattern grows in a very unique way. (by toroidalet)
=27	19	Exploration in Bosco's Rule	FWKnightship and Yoel	[37]
including two W110 emulators and the first natural gun in the rule. (by FWKnightship and Yoel)
=29	18	A wandering spaceship	confocaloid	[38]
This is a moving object that looks like a spaceship, except that it never gets destroyed even if one is allowed to arbitrarily choose one of two rulesets before every tick, and continues to move while changing its trajectory depending on the sequence of "ruleswitches". (by confocaloid)
=29	18	Marine Magnificence	FlutterWithKSparkler	[39]
An explosive rule with several small guns of several small periods. (by FlutterWithKSparkler)
=29	18	Various reflectorless rotating oscillators	many	[40]
This includes RROs which have a high number of n-fold packings, a huge LTL RRO by Sophie, and a wick burning RRO by Sophie. (by many)
=29	18	New spaceships in OT hexagonal rules including a INT hexagonal cordership	many	[41] [42]
This includes oblique, orthogonal, and diagonal ships. (by many)
=29	18	W110 emulator stripes in Grounded Life, Just Friends, and B3/S2	many	[43] [44] [45]
The one in just friends was made by a signal loop from ships, and the other 2 were made by burning still lives that form basic logic gates. (by many)
=34	17	Some constructions in B2i34cj6a7c8/S2-i3-a4ceit6in	many	[46]
This includes infinitely many oblique spaceships. The ships are made from a smaller ship that when hitting a still life can be bumped up, hit other spaceships, or produce gliders. (by many)
=34	17	3 OMOS's of a (2,1)c/51 knightship	pipsqueek	[47]
The 3 OMOS in the rule are a p312, p462, and a p1386. (by pipsqueek)
=34	17	Self-inverse rules	muzik	[48]
These rules are able to maintain a rectangular tiling symmetry in spite of chaos. (by muzik)
=34	17	New gliders in 2-state von Neumann rules	many	[49]
This includes the first known knightship in 2-state von Neumann rules, and some orthogonal, diagonal, and slow ships. (by many)
38	16	Factorio	H. H. P. M. P. Cole	[50]
A rule with various interesting mathematical properties. (by H. H. P. M. P. Cole)
39	15	A tiny c/7 in Diamoeba	cyl	[51]
It is a lot smaller then the other c/7 in the rule. (by cyl)
40	11	Some exploration in multistate rules	many	[52]
Many rules that add variations to CGOL were investigated, including Brew, Symbiosis, and StateInvestigator. (by many)
41	9	Hash2	b-engine	[53]
an LtL rule with a very small camelship. (by b-engine)

2022

Entries • Voting • Results

The OCA Discovery of the Year competition for 2022 was organized by Cyclotrons. Voting ended on October 1, 2023.

Final rank	Stars	Pattern/Discovery	Author(s)	Link(s)
Description
1	42	Fast, small, adjustable-slope spaceships	kiho park	[54]
Fast, small, adjustable-slope spaceships (by kiho park)
=2	34	Various engineering feats	mystical	[55]
Various engineering feats (RRO, adjustable-slope ship, speed orthogonoid, Minsky register machines, and √2 calculator) in B2-ae3aceky4jkr5ijny6e/S1c2aci3-ir4cekrtwz5-aijr (by mystical)
=2	34	Some interesting counter patterns	toroidalet, Jiahao Yu	[56] [57]
Some interesting counter patterns, including a record 2-cell methuselah (by toroidalet and yujh)
3	33	A very small computer in Semaphore	_zM	[58]
A very small computer in Semaphore (note: not the one from 2023) (by _zM)
4	28	6803c/403840 diagonal spaceship	dani	[59]
A 6803c/403840 diagonal spaceship (by dani)
=5	27	Several replicator-based spaceships	many	[60] [61] [62] [63] [64] [65]
Several replicator-based spaceships (by many)
=5	27	A single rule with a small splitter, adjustable-slope spaceship, and SMOS	FWKnightship	[66]
A single rule with a small splitter, adjustable-slope spaceship, and SMOS (by FWKnightship)
=5	27	New discoveries in B38/S23	many	[67]
New discoveries in B38/S23 (by many)
6	25	Universal computer + constructor in Flow6	Redstoneboi	[68]
Universal computer + constructor in Flow6 (by Redstoneboi)
=7	23	The Bazaar rulespace	NimbleRogue	[69]
The Bazaar rulespace (by NimbleRogue)
=7	23	XOR replicator omniperiodicity research + adjustable replicators + many new regular and irregular replicators	many	[70]
XOR replicator omniperiodicity research + adjustable replicators + many new regular and irregular replicators (by many)
=7	23	5s progress	many	[71]
5s progress (by many)
=7	23	OT universal computation progress	many	[72]
OT universal computation progress (by many)
=7	23	Slide sqrtgun from soup	LaundryPizza03	[73]
Slide sqrtgun from soup (by LaundryPizza03)
=7	23	WWEJ3 replicator, metapixel	wirehead	[74]
WWEJ3 replicator, metapixel (by wirehead)
=8	19	A subset of whitespace characterized by large spiral patterns	jimmyChen2013	[75]
A subset of whitespace characterized by large spiral patterns (by jimmyChen2013)
=8	19	Greyspace, a rulespace where the whitespace spacefiller leaves a less dense agar	many	[76]
Greyspace, a rulespace where the whitespace spacefiller leaves a less dense agar (by many)
=8	19	An interesting engineered spaceship in WWEJ3	toroidalet	[77]
An interesting engineered spaceship in WWEJ3 (by toroidalet)
=8	19	Naturally occurring c/395 orthogonal spaceship in B36a/S235y, a rule two transitions away from Life	Carson Cheng	[78]
Naturally occurring c/395 orthogonal spaceship in B36a/S235y, a rule two transitions away from Life (by Carson Cheng)
=8	19	Izhora (FireWorld computer)	Yoel Matveyev	[79]
Izhora (FireWorld computer) (by Yoel)
9	16	Hexagonal neighborhood progress	many	[80]
Hexagonal neighborhood progress (by many)
10	11	OT spaceship progress	many	[81]
OT spaceship progress (by many)
=11	10	VN spaceship progress, particularly in B0	many	[82]
VN spaceship progress, particularly in B0 (by many)
=11	10	Research into the simplest Sir Robin gun in Life-emulating multistate rules	confocaloid, toroidalet	[83]
Research into the simplest Sir Robin gun in Life-emulating multistate rules (by confocaloid and toroidalet)

2021

Entries • Voting • Results

The OCA Discovery of the Year competition for 2021 was organized by Saka and Cyclotrons. Voting ended on September 1, 2022.

Final rank	Stars	Pattern/Discovery	Author(s)	Link(s)
Description
1	42	INT Langton's Ant Simulator (B3-cjkq4knqy5cnr7/S02-cn3-ak4eiq5kq6e7e)	Silversmith	[84]
A small INT Langton's Ant Simulator in INT rule B3-cjkq4knqy5cnr7/S02-cn3-ak4eiq5kq6e7e
2	34	jellyfishless gun in B36/S245	Luka Okanishi	[85]
jellyfishless gun in sqrt replicator rule (formerly Logarithmic replicator rule), analogously for the gliderless constructions in CGoL
=3	33	a (2,1)c/4 in B256/S4568	May13	[86]
Spaceship moving at fast oblique speed (2,1)c/4
=3	33	several patterns with unusual growth rate	AforAmpere and Connor Steppie	[87]
several patterns with unusual growth rate
5	28	Aleph's quad-glider rule (B3-ky4jy5cr/S2-in3-aeky4cnrt5a6ekn)	Aleph	[88]
Aleph's quad-glider rule (B3-ky4jy5cr/S2-in3-aeky4cnrt5a6ekn)
6	27	a number of new OT rule being proved to be Turing-complete	many	[89]
a number of new OT rule being proved to be Turing-complete
=7	25	a fast W110 replicator	AforAmpere	[90]
T-tetromino as a fast W110 replicator - self-supporting unit cell between rules B2ai3aeir4r5ei/S3e5e6i and B2-c34-i56-i78/S2-ai3-i4-e5678
=7	25	May13's Shipworld (B3acijy4-a5cjkr6-in78/S2n3-c4-aijz5-jy6-k) Spaceships	May13 and AforAmpere	[91]
May13's Shipworld (B3acijy4-a5cjkr6-in78/S2n3-c4-aijz5-jy6-k) Spaceships
9	23	new figseed records	many	[92]
new figseed records
10	22	a number of new highest period spaceships	many	[93]
a number of new highest period small alien spaceships
11	20	various LtL spaceships found by cfind	lemon41625	[94]
various Larger than Life spaceships found using cfind
12	19	new OT hexagonal spaceships	creeperman7002	[95]
new spaceships in outer-totalistic rules with hexagonal neighbourhood
13	16	a number of new symbiosis discoveries	many	[96]
a number of new symbiosis discoveries
14	11	LeapLife billiard tables	Aleph	[97]
LeapLife billiard table oscillators

2020

Entries • Voting • Results

The OCA Discovery of the Year competition for 2020 was organized by Peter Naszvadi and bubblegum.

Final rank	Stars	Pattern/Discovery	Author(s)	Link(s)
Description
1	45	Day and Night knightships incl. a growing one	AforAmpere and Adam P. Goucher	[98] [99] [100] [101] [102]
Various knightships in B3678/S34678 (Day and Night), including a growing knightship
2	44	Small natural replicator simulating W110	Arie Paap	[103]
Replicator that follows the computationally universal 1D rule W110
3	43	Tiny adjustable ships/oscillators	Arie Paap and Oscar Cunningham	[104] [105] [106]
Adjustable ships/oscillators: mobile ship tracks (diagonal ship bouncing between and slowing down two orthogonal ships), also the first relativistic adjustables; 3-cell adjustable spaceship family with infinite speeds and a rule family with 12 members supporting 3-cell adjustable oscillators covering all periods, by Oscar Cunningham
4	41	Speed Orthogonoids and Geminoids	cvojan	[107]
304c/11272 Orthogonoid and (700,100)c/72300 Geminoid in B2c3aeij4krtyz5cij6-ak7/S2-ik3-aek4aeiknw5a6ikn7 (Tubular)
5	40	Wire-like rule 1e2-a3-cij4kaijrtz5cnrq/2ce3aejnr4aj5y6a/3	silversmith	[108]
1e2-a3-cij4kaijrtz5cnrq/2ce3aejnr4aj5y6a/3 (A Wire-Like World), a universal Generations wiring rule with complex dynamic circuitry and construction capabilities
=6	39	Oblique (421,1)c/867 ship	AforAmpere	[109]
Spaceship moving at (421,1)c/867
=6	39	LFoD O(t^(3/2)) growth construction	FWKnightship and praosylen	[110]
Constructed pattern in B2/S0 (Live Free or Die) that grows with a complexity of O(t^(3/2))
8	38	Various LeapLife discoveries	Hunting	[111] (a compilation of known technology can be found at [112])
Meta-discovery: An attempt to reproduce the development of CGoL - and see how state of art tools and blueprints could accelerate this process with much success.
9	37	Various W110 unit cell constructions	Naszvadi, FWKnightship, Layz Boi and GUYTU6J	[113] [114] [115] [116] [117] [118] [119] [120]
Various W110 generalized unit cells, rakes and (noncompact) stripes in Day & Night, Morley, Sqrt replicator rule, B368/S12578, Live Free or Die, Seeds, Life without death, DotLife, a TC 4-state von Neumann rule, 14-state OT hexagonal rule with 2×2 CGoL unit cell and a 4-state hexagonal rule directly simulating CGoL
10	36	B378/S23 first glider gun	Matthias Merzenich, Naszvadi and Paul Tooke	[121]
Márta guns, the first guns in B378/S23
=11	35	Natural adjustable ships	Saka	[122]
Adjustable-speed spaceships to have been found naturally rather than constructed, with unusual complex mechanism for adjustability. A Diamoeba-like IOT rule: B2ci3-i4cit5-i6-i78/S3a4t5678
=11	35	First Unit Cell's visualisation rule	Naszvadi	[123]
Visualisation of CGoL patterns in the first ever constucted p5760 unit cell grid
=11	35	Failed replicator in OT rule B378/S2458	LaundryPizza03	[124]
B378/S2458, a new gem of an OT rule with a failed 1D replicator
=11	35	Box-pushing spaceships	Saka	[125]
Various spaceships including boxes with smaller spaceships pushing them from the inside, right triangles and crosses
=15	34	Various Symbiosis discoveries and constructions	many	Too many to list; the first post in the Symbiosis thread in 2020 can be found at [126]
New developments in Symbiosis, including a vast array of oscillators and guns, lightspeed signal circuitry and a unique MSM breeder.
=15	34	Various oscillators and spaceships in HROT rules	lemon41625, Saka, Chris Rowett and Hunting	[127]
Oscillators and spaceships in HROT rules: circular chequerboards fighting for territory, and rocket rules in the cross neighbourhood
17	33	Spaceship discovery progress in Life-like von Neumann rules	Naszvadi and praosylen	[128]
Various spaceships and replicators in R1 OT B0 VN rules
18	32	HROT Almostlife discoveries and W110 constructions	lemon41625 and FWKnightship	[129]
R2,C2,S6-11,B9-11,NW0010003330130310333000100 (AlmostLife), a HROT rule very close to Life resembling an INT rule, with first ever constructed HROT unit cell simulating W110 by FWKnightship
19	30	B36/S245-alike logreplicator	AforAmpere	[130]
Replicator emulating the B36/S245 sqrt replicator
20	29	Binary counter-stretcher-lograke-ship	Naszvadi	[131]
Binary counter one-ended wavestretcher/logarithmically-growing spaceship
21	25	Crystal Chaos HROT rule	Connor Steppie	[132]
R2,C0,S4-7,9-11,B4,NB (Crystal Chaos), a dynamic HROT rule with a hidden crystal structure that allows for fragile explosions

2019

Entries • Voting • Results

The OCA Discovery of the Year competition for 2019 was organized by testitemqlstudop and bubblegum.

Final rank	Stars	Pattern	Author	Link(s)
Description
=1	37	Dominoplex Orthogonoid	2718281828	[133]
Orthogonoid spaceship in rule B2cen3ek4ejkwz5-ein6an7e8/S12an3-eijq4enrty5e6k.
=1	37	Orthogonoid	AforAmpere	[134]
Speed orthogonoid spaceship in rule B2ein3cijn4cnrwy5cnq6e/S1c2-ai3acny4anqy5c6ek8.
3	33	Snowflakes' pseudo-Orthogonoid	Goldtiger997, et al. (2718281828, dani, toroidalet, BlinkerSpawn, etc.)	[135]
A pseudo-orthogonoid, a self-constructing puffer.
4	26	RROs	2718281828 and AforAmpere	[136]
massive reflectorless rotating oscillators.
5	25	3S1CShip8 and its c/2^6911+6913 one-cell ship	fluffykitty	[137]
3S1CShip8 and its c/2^6911+6913 one-cell ship.
6	24	Non-explosive B1e rules	toroidalet, Saka, testitemqlstudop, Arie Paap, praosylen, et al.	[138]
Non-explosive B1e rules.
7	23	B2a/S circuitry	toroidalet	[139]
Signal logic circuitry with replicator streams
8	22	Additions to the 5S project	Arie Paap, et al.	[140]
Additions to the 5S project, especially these ones: (176,1)c/440, 108c/37886 diagonal, (98,97)c/4312
9	21	GUYTU6J's OCA discoveries	GUYTU6J	[141] [142] [143] [144]
Triangular and ruler replicator + SMOS, 2D replicator with beautiful fractal, 2D replicator firing gliders and 10c/20s, Bizarre rake-plicator
10	20	Hactar's 2x2 p2 metacells	HactarCE	[145]
Hactar's 2x2 p2 metacells simulating outer-totalistic life-like rules.
11	18	Omosso's pair-interaction ships	77topaz, et al.	[146]
Omosso's pair-interaction ships with very high periods.
=12	17	Mahler-rep	Letters	[147]
Mahler-rep, a modification of Devore which allows for smaller replicators and computers.
=12	17	Rule X3VI	Rhombic, testitemqlstudop, et al.	[148]
The first INT rule to reach 1T objects in C1 on Catagolue.
14	16	Rule 110 in Codd	Naszvadi	[149] [150]
Usual W110 unit cell that proves Turing-completeness of a classic 8-state vN rule by E.F. Codd.
15	15	ZombieLife	77topaz, Moosey, dani, Dave Greene, et al.	[151]
A rule with its enormous natural spaceships.

2018

Entries • Voting • Results

The nominations for the 2018 competition were organized by Rhombic, and the voting by 77topaz. Users were able to vote on as many entries as they wished, awarding up to three stars to each one.

Final rank	Stars	Pattern	Author	Link(s)
Description
1	38	Adjustable slope spaceships	AforAmpere	[152]
Spaceships which can be adjustable to travel at any integer slope.
2	24	bf esolang simulator	M.I. Wright	[153]
A cellular automaton simulating the bf programming language.
=3	23	ATPP	dani	[154]
A rule containing many spaceships based on failed replicators as well as several actual replicators based on it.
=3	23	Exponentially long-lasting methuselahs	toroidalet	[155]
Various fuse-based methuselahs, one of which has an estimated lifespan of 22^50 generations.
5	22	Smallest Oscillators Supporting Specific Periods	Oscar Cunningham	[156]
Examples of two-cell oscillators for every period up to 102.
6	21	8c/9 orthogonal spaceship	AforAmpere	[157]
The fastest known sub-lightspeed spaceship in an isotropic non-totalistic rule without B0.
7	20	Suns	Goldtiger997	[158]
A rule containing a high-period oscillator which can be hassled at various other periods.
8	18	JvN29 loop-based replicator	fluffykitty, Redstoneboi	[159]
A replicator in von Neumann's original cellular automaton.
=9	17	Omosso	Saka	[160]
A rule containing high-period spaceships, a natural RRO, and OMOSes of various periods, hence its name.
=9	17	Rule 110 unit cells in various rules	Peter Naszvadi, Luka Okanishi, LaundryPizza03	[161] [162] [163] [164]
Proofs of Turing-completeness for rules including but not limited to HighLife, DryLife, and LowDeath.
11	16	tlife puffer	dani, Luka Okanishi	[165] [166]
An 8c/282 orthogonal puffer, and a spaceship based on it.
=12	15	Hype	FlameandFury	[167]
A rule with a wide variety of high-period oscillators which has also been proven omniperiodic.
=12	15	Hive	dani	[168]
A rule with a failed replicator from which various high-period and unusual-speed spaceships have been constructed.
=14	14	Record-slowest spaceships	AforAmpere	[169]
A rule table supporting spaceships based on Knuth's up-arrow notation, allowing for unimaginably slow speeds.
=14	14	Emitters	dani	[170]
A rule with many high-period oscillators (similar to Hype) but also a small spacefiller, a replicator, and several guns.
16	13	Other adjustable spaceships	Luka Okanishi, Connor Steppie, Arie Paap, 2718281828, AforAmpere	[171]
17	11	Other RROs	2718281828, et al.	[172]
18	10	Arrow	77topaz	[173]
A rule with adjustable rakes and many known reactions based on them.

2017

Entries • Voting • Results

The 2017 competition was organized by Rhombic. Users were able to vote on as many entries as they wished, awarding up to three stars to each one.

Final rank	Stars	Pattern	Author	Link(s)
Description
1	25	Orthogonal adjustable spaceships	praosylen, Luka Okanishi	[174] [175]
Two rules allowing for the trivial construction of infinitely many odd and even-period spaceships respectively.
2	18	5s project	dani, et al.	[176]
A collection of the smallest known spaceships of every speed among the isotropic non-totalistic rulespace.
=3	15	SMOSMOS	Saka, et al.	[177]
The first known spaceships made of SMOSes, with various examples posted.
=3	15	Movostill 3	dani	[178]
A rule with various elementary spaceships and guns as well as construction potential.
=3	15	HighLife replicator spaceships	Luka Okanishi	[179] [180] [181]
Replicator-based spaceships traveling at speeds of c/18, c/12, and c/30 diagonal respectively.
=6	14	tDryLife pondlayer-based spaceship	Luka Okanishi	[182]
An engineered spaceship based on a high-period pond puffer.
=6	14	One-cell universal constructor	blah	[183]
A method of producing arbitrary complex patterns from a single cell using rule tables.
8	12	Snowflakes	BlinkerSpawn, dani	[184]
A rule with construction potential despite its differences from Conway's Game of Life.
9	11	Rule 110 unit cells in various rules	Peter Naszvadi	[185] [186] [187] [188]
Proofs of Turing-completeness for certain Life-like rules including but not limited to Pedestrian Life, EightLife, and HoneyLife.
=10	9	Spaceship-bouncing-off-object adjustable spaceships	Connor Steppie	[189]
=10	9	Extremely slow spaceships	BlinkerSpawn, et al.	[190]
The design of spaceships with excruciatingly slow speeds using different approaches
12	7	Slope-73 spaceship	AforAmpere	[191]
A (73,1)c/160 spaceship, at the time the oblique spaceship with the steepest known slope.
13	6	Larger than Life developments	Saka, Connor Steppie, et al.	[192] [193] [194]
A collective entry for various discoveries within the Larger than Life rulespace.