The RAREST Move in Chess?!?!?!

[@Mike_Rottchburns]

Hikaru’s editor can you please include the link of the original video in the description? I tried pasting it in the comments for all to see but it removed my comment

[@MoreGMHikaru]

kzbin.info/www/bejne/n3XRiGONnqikhMU

[@lulerogaming1694]

@@MoreGMHikaruwhat's wrong about adding it to the description? You don't think its creator would appreciate?

[@benkechidarahim3996]

Just shut the fuck up maybe he didn't think about it ​@@lulerogaming1694

[@jdb725]

its in the description now, if it wasnt before

[@kazboven9744]

​@@lulerogaming1694 he said in another comment that it was the editors fault nit hikarus fault

[@normgao3443]

Opponent: ha! I made him think Hikaru: how do I double disambiguate checkmate him 20 moves in the future…

[@normgao3443]

Side note: hardest I’ve laughed at a video in a while

[@leonhard6327]

*proceeds to move the wrong knight in the end*

[@FPVSkittles]

It’s an amazing a frustrating dichotomy how he’s able to simultaneously be intelligent enough to force these impossible scenarios while at the same time barely being able to understand which piece is doubly disambiguated.

[@mltinus]

This was so frustrating!!! I'd already seen the original video and could quite easily follow, even though I'm like a 750 ELO player. -> Disambiguate means 2 of the same pieces on the same rank or file -> Double disambiguate means 2 of the same pieces on both the rank AND the file... You need to disambiguate with 2 characters (number for rank and letter for file) to have a unique notiation for that piece!! I don't understand how he can keep on having to really think about which piece is doubly disambiguated, because it's always the 'middle' piece of the triangular setup of the 3 same pieces, the only piece that has a piece of the same type on its rank AND file.

[@DaulphinKiller]

Exact same thought here. Really surprising how ability for abstract reasoning seems orthogonal to chess skill O_o.

[@lucky_ro049]

Was searching for this comment, this was so confusing to watch…

[@drakewinwest9888]

He’s not a data scientist guys

[@Mentous680]

He doesn't have a very high IQ. the first part is easy to explain, if you train yourself for so many years on how every chess piece moves you can easily manipulate the game to have a certain position ( of course if you are against a beginner). but the second part doesn't have anything to do with how chess pieces move, he created the position in the video with ease. but then it's just a simple thing to figure out which bishop to move at the end. that is the difference between hard work and talent or (being smart). you can see in his videos that out of chess he isn't really smart, if he tries to play another game that is not chess he would probably be below average. I'm not hating on him its just what I notices, I would never be able to achieve what he achieved in chess.

[@Flamarius]

28:43 imagine blundering a double disambiguation smh 😒

[@boxofcans461]

😑

[@3Bp23]

😂😅

[@joshuabarnett7128]

I read this before I saw it so I thought you were just imagining... Laughed so hard

[@uis246]

No, it's only singularly disabiguated knight checkmate

[@Flamarius]

@@uis246 yeah, because he blundered, which would be the point of my comment

[@AEmc2]

"...So statistically this move is the most rare and has not happened, even once" Hikaru: And I took that personally.

[@rosebudtv4660]

Goodhart's law - any observed statistical regularity will tend to collapse once pressure is placed upon it for control purposes.

[@cccpkingu]

@@rosebudtv4660 irregularity? (or is that a sneaky joke?)

[@takeshimovies5869]

small disclamer "on lichess"

[@zazberry]

arshkarpoor has the rarest experience of being double DOUBLE disambiguated, almost discombobulated if you will

[@FahimHoq]

it was nice to see that he was good sport and didn't resign. I wonder if he was watching Hikaru's stream.

[@aarvlo]

@@FahimHoq i mean if i got a game with a gm and saw them pulling shit like this i wouldn't resign either lol

[@ArshPlaysChess]

​@@FahimHoqyeah I was

[@ArshPlaysChess]

❤❤

[@sknX97]

*I am gonna destroy you ❌ *I am gonna double disambiguate you ✅ Lmfaoo, love the new flex phrase 🤣

[@Shendue]

I'm gonna disambiguately discombobulate you.

[@orbcfdi]

*arshkarpoor* is part of the history with only moving his king, what a legend

[@viraltkrmk]

hahahaha

[@ArshPlaysChess]

❤ btw i am the opponent

[@twh7eed]

​@@ArshPlaysChess💀 dude stop this shit

[@HunterBelkiran]

@ArshPlaysChess congrats dude you're part of history now

[@warehousedave7937]

36:18 🎉 congrats to GMHikaru for playing the rarest chess move of all time!

[@springsmart]

Twice

[@pulkitgoyal8685]

But according to lichess

[@ddandymann]

Which means that it is no longer the rarest move in chess

[@uis246]

​@@pulkitgoyal8685the only avaliable database of moves

[@cccpkingu]

moves*

[@josefkolaskey108]

The heartbreak when he needed to use the other knight.

[@1Higgs0Boson1]

he didn't. All 3 knights could have capture mated there and you need rank and file to disambiguate which one was moved

[@darkthunder312]

@@1Higgs0Boson1 it was n7xd5#. there was only one knight on the 7th rank so further disambiguation is unnecessary

[@pmgvictor4625]

Shoutout to the best “good-sport” opponent *Arshkarpoor* for getting double-disambiguated knight Checkmated.

[@grantcivyt]

AND bishop 😅

[@rohitaasberi]

Getting doubly double-disambiguated-Capture-Checkmated🤣

[@benpeterson4998]

"Time to double-disambiguate somebody" killed me

[@bloominguez]

Literally screaming at the TV as Hikaru grabbed the wrong knight.

[@weng3x226]

Same lol

[@gdmathguy]

🚗 HAAAANK!! DON'T PICK UP THE WRONG KNIGHT!! HAAAAAAAAANK!!

[@whataboutthis10]

And then he almost used the wrong Bishop as well lol

[@HerrHermannMann854]

Eric rosen will soon introduce the double disambiguated knight and bishop special rosen stalemate trap

[@davidsantiago7808]

I forgot that guy exists

[@cccpkingu]

@@davidsantiago7808 That is how he gets you

[@zazberry]

‘Oh no, my bishop is disambiguated!!’ 👀

[@drunkenxrage]

You're literally giving Kramnik statistcal fodder at this point 😂

[@konstanty8094]

*improbable*

[@dbturbonub2536]

LOL!

[@turloughhughes]

Interesting.

[@mohitjeetsingh7765]

Let's start the procedure!

[@Joyexer]

it has no statistical value, because he saw the video... Still awesome stuff tho!

[@r.sourabhyadav7650]

now hikaru is goin to do trickshots in chess

[@uis246]

Trickstabs

[@cynical5062]

market garden

[@uis246]

@@cynical5062 rocketjumps

[@AliceYobby]

I love videos like this because it shows that Hikaru is really not very generally smart but however is an absolute genius at chess and can essentially do whatever the fuck he wants on the board lol

[@HexFent]

chess is a skill just like everything else, has nothing to do with intelligence unless you have a learning disability.

[@dr.chalmers7923]

Everybody messes up at some point Even you and me

[@Crew7340]

Its hilarious how he can figure out how to do this almost impossible mate but can't figure out which piece is disambigous

[@tylerjustinfisher4277]

I love how he doesn’t even really know what the word disambiguated means but somehow can still plan out the mate two dozen moves in advance lol 36:00 “This is only once disam…this knight is only once ambiguated…so this is disambiguated…this should be the disambiguated knight right? This is the double”

[@AliceYobby]

@@tylerjustinfisher4277 lmao, exactly!

[@COIN_LuigiPres1]

Hikaru single-handedly destroying all of this man’s data in 3 games

[@MKProsD]

7:54 “I’ve never done bishop under promotion ” except in his disrespect speedruns 😂

[@uis246]

Wasn't there also game with stockfish, where he mated with loads of bishops?

[@julioaurelio]

@@uis246 It wasn't against stockfish, it was a game against the engine "Rybka" in 2008.

[@sublimeade]

Ia he still doing Dr Disrespect speedruns after the controversy

[@maxzjj]

Rarest sentence in English: "The doubly ambiguous bishop knights the king".

[@PWMV573]

I died

[@vincehomoki1612]

It's not the rarest, as it had been said already, and there are still a boatload more 0s waiting to turn into 1s.

[@migssdz7287]

Hikaru managed to blunder knight double-disambiguated capture check mate in 1

[@ravinavlal]

This is the best chess content ever, I really missed this side of creative Hikaru

[@absurdism101]

?????? He literally is watching someone else's video

[@orbcfdi]

@@absurdism101 he plays himself after the vid part buddy

[@rudy_4ier]

@@absurdism101 you dumb bro? 19:07 onwards is pure original content

[@ordinary_milk]

double disambiguating someone with bishops sounds like a toture method 💀

[@mikemck4796]

Sounds very catholic…

[@ianstopher9111]

No one expects the Spanish Inquisition.

[@ilomilo850]

Omg the replies are even funnier than the comment??? I didn’t think that was possible

[@ordinary_milk]

@@ilomilo850 yea bro i thought the same i was like "let's make a (somewhat) normal funny comment and this is the results 💀

[@isuckatnames6033]

LOL I commented on the original video how it'd take less than two weeks for this to be turned into a rite of passage by some GM

[@popodori]

this poor guy's entire study out of the window

[@wallacesantos0]

"I'm trying to double disambiguate my opponent" sounds so funny to me. I'm crying LMFAO

[@DionysisGalanis]

You should have actually made these rare moves on lichess in order to add them to their database.

[@robertovillagran5364]

19:12 “Time to double disambiguate somebody” is so funny lmao

[@donaldmarcato7003]

On one hand my soul left my body when he took with the wrong knight first game; on the other hand, he nailed the setup first try and only needed a couple games to do something that’s never ever before been done…. Chess is such a strange thing

[@versengetorix]

"I have to double disambiguate him!"

[@123crackera]

"this is too hard" Hikaru after double disambiguating *twice* a 1000 elo opponent

[@limmeh7881]

I think an easy way to figure out the correct bishop or knight when the formation is set is that it seems to be the one in the “corner”.

[@louiserocks1]

Its just which one sees 2 other ones. Like if you do a + line coming out of the bishop/knight, how many others does it see in the + line. If they're like + ++ Then the bottom left one sees both, the other 2 only see one. This is like 1st or 2nd grade math stuff lol, funny how hikaru couldn't get it

[@xKrown]

arshkapoor is the hero we needed

[@FahimHoq]

It was great to see that he was good sport and didn't resign. I wonder if he was watching Hikaru's stream as well.

[@ArshPlaysChess]

❤❤

[@mananbachani5189]

29:03 i was screaming on top of my voice, "WRONG KNIGHT BRUHHH"

[@DaevorTheDevoted]

I died a little inside.

[@Mentous680]

he is so smart yet so dumb idk how.

[@GrabnarMyers]

I dont get how thats the wrong knight. All the knights are looking at eachother and theres three of them. He literally did it?

[@mananbachani5189]

@@GrabnarMyers for double disambiguation there should be three or more knights that can reach the same square, this is bcz we want the file as well as rank mentioned in the algebraic notation of the move, normally a knight move would be Nf3 but in this case it would be Ng1f3, in a single disambiguation it is either file or rank mentioned N1f3/Ngf3, these types of notation specify which knight on the board is arriving at a particular square, the trick to find which one to move (in Hikaru's game) is to look at which knight is at the corner of the L formed by knights

[@GrabnarMyers]

@@mananbachani5189 “for double disambiguation there should be three or more knights than can reach the same square”. In the example I gave, (where theres a knight in the middle without forming a straight diagonal line) this is true just as much as if they are diagonal. When they are diagonal- two knights are both looking at the knight in the middle. Thus all three knights are “on” the same square. When they are in a “double L” shape- two knights are both looking at the knight in the middle. Thus all three knights are “on” the same square. There literally is not a difference by any measurement. I think people are misunderstanding this and saying its not a double disambiguation when it is. As there is mathematically zero difference. What is the difference, at all. Where is it.

[@burningwings6788]

Hikaru: I haven't done that underpromotion. Also Hikaru with his 5 bishops against Rybka:

[@gaboelexo]

36:18 the knight one 48:18 and the bishop one

[@kayquealbuquerque7213]

Why do you use photos of dead people?

[@SKRUBL0RD]

the nerdiest accomplishment in chess history, and he live solves the problem but gets too excited on the last move and blunders it. classic.

[@TonyAube]

The rarest pizza topping is actually Astatine. An extremely rare and highly radioactive element with the symbol At and atomic number 85, that decays quickly, and which found in small trace amounts deep down the Earth's crust.

[@Adam_Wilde]

Not inaccurate.

[@Handlesareastupidsystem]

How about Oganneson, it's synthetic and decays in like 7 seconds

[@jessehammer123]

@@HandlesareastupidsystemOganesson’s half-life appears from what I can tell to be something like 0.7 milliseconds.

[@SteveBennett1]

The rarest pizza topping is not found in this galaxy

[@zbrah21]

I know this is a joke, but by that logic, anything that has never been on pizza before is tied for the rarest. That's the spaghetti monster analogy the guy makes at the end of the video, where he's debating what actually constitutes as "rare", and whether we include things that could never conceivably happen

[@konstanty8094]

Since the video about the rarest move is popular, other people have attempted it and it probably is no longer the rarest move.

[@admiralaokiji7889]

@RaniaIsAwesome in its human nature to want to do something that's never done before. if you had the chance to be the first to do it you'd do it. u goofy

[@SirSX3]

I think it will still be the rarest because it is actually incredibly hard to do. The only way to do it really is if your opponent allows you, as is the case here, but then in that case it's not really a real competitive game of chess anymore

[@konstanty8094]

@@SirSX3 you can play with a friend, who cooperates and lets you do this

[@Darthtanos]

@@konstanty8094 you still have to figure out how to set it up without causing a stalemate in the process... which is not the easiest thing in the world.

[@Genesisfury]

Bro thinks he’s double disambiguated

[@XenoTheTurtle]

​@RaniaIsAwesome well, chess notations aren't just about checkmate. Primarily it's about which piece was moved. Yeah, the other two bishops wouldn't have led to checkmate, but the notation must first state which piece was moved, and that's the ambiguous part. Even if only one of those moves was mate, we must always clear that ambiguity first. Otherwise, we would most of the time just say something like "f3#" or instead of Qxf3# in a normal match, and it could lead to a lot of confusion and make the recreation of the board a lot harder. And, yeah... It's a bit redundant, but it works quite well, no need to change what ain't broken. Also, in the case of the double disambiguity, literally all bishops always lead to checkmate, since the attacked squares remain the same no matter which one takes the pawn... Are you talking about single disambiguity?

[@paragwho]

​@@XenoTheTurtle bro stop yapping no one's reading all that

[@XenoTheTurtle]

@paragwho this was a response to someone that said something like "idk why we need to dosambiguate pieces that are attacking a square if only one leads to checkmate", they've since deleted their comment :P

[@Scherzo-mk4ih]

You double-double disambiguated that player

[@sameh.H]

Kramnik: I saw Hikaru checking video positions while the game was on, let’s do the procedure.

[@whataboutthis10]

Well he was also advised by chat on which Bishop to capture-mate with in real time

[@misterhoudi2824]

The Double disambiguation is the equivalent of 720 degree no scope with three consecutive headshots.

[@ariaden]

So, stalemate does not have its own sign? I bet doubly disambiguated bishop capture stalemate is quite rare.

[@nomsomething]

Draws don't have a dedicated piece of notation unlike checkmate and by extension stalemate has no special notation either.

[@ariaden]

@@nomsomething Checks are not results, but they do have a notation. Wins are results, but (unless checkmate) they do not have a notation (at least not attached to a move). Edit: Now I see even en-passant is not distinguished from ordinary capture in PGN, so it is not clear how many disambiguated pawn capture mates are en-passant.

[@nomsomething]

@@ariaden en passant is no different from a normal pawn capture by result I suppose and checkmate and check symbols are probably for ease of communication over chess by mail idk

[@debrascott8775]

This guy could teach Kramik about stats. Nerdy interesting.

[@oceanman1398]

Rare moment of me yelling at the screen telling Hikaru what to do

[@buzzsburner.8286]

20:27 somewhere, somebody was thinking "whoah, I'm making hikaru stop and think about what he's doing! I'm doing so good!" and in reality hikaru is just thinking about some weird abstract move he's going to make 20+ moves from then

[@flippert0]

This whole question is quite complicated: what are we actually looking for? Is just a specific move? A move category? A special development of the game, which would necessitate looking at the whole game tree? Paralogical wisely restrained himself to looking at move _categories_ instead of looking at specific moves or whole game trees.

[@mikemck4796]

As he mentioned in the video, he didn’t have much of a choice. 30% of all possible moves were unplayed.

[@ClaramayNivetta]

"Time to double-disambiguate somebody" is an awesome sentence

[@sethlawson8544]

"And this knight is only ambiguated once" lmao

[@ladeedaa]

Jesus, Kramnik should take notes from this guy!!! 😂

[@richouzzz4781]

i wanna highlight the fact he ALSO learns how to do it under 3 MINUTES

[@cosmiclightning4723]

Doing it basically twice is pretty impressive. And finding opponents that didn't resign

[@Julio1jpg]

I lost it when he got it so close the first time and he fails xD Hikaru's too good

[@glenncooper3524]

19:11 " Time to double disambiguate someone" ROFL!!!!! Go Hikaru!!!!!!

[@smthnotmuch]

Martin never resigns

[@MatthewDiaz-b3f]

Why not link the guys channel if you are going to base your entire video around his content? It’s basic decency.

[@nathangriffith8352]

Same guy who loves to copyright striking other channels for showing 1 second of his videos

[@Pascal-md9os]

Hikaru doesnt know about decency...

[@mono1931]

The original guy that hikaru is watching is a guy called Paralogical. You’re welcome

[@torstenunhger6609]

Well I mean it's win win for both since more people gonna see his vids now. But of course that doesn't justify the fact that he gotta put a link down to that vid

[@shawnlee3997]

Correct

[@davidsantiago7808]

Kramnik about to add this to the data, time to do the procedure

[@M1412B]

Hikaru giving the rarest reaction of all: a quadruple disingenuous surprised face reaction

[@fukhungyudarman3958]

The guy has conquered all the puzzles, he's making his own puzzle instead.

[@davidanderson_surrey_bc]

FIDE now has a whole new category of tournament. Forget Chess960, it's the World Double Disambiguation Checkmate Championship!

[@dalvikus]

Doubly disambiguated double adoption

[@one-to-one-ratio]

Rhubarb on pizza😂😂

[@IbokRock811]

That’s so incredibly absurd that there were no examples - and then you played it perfectly almost right away - plus the capture - that’s sick 👏👏👏

[@FahimHoq]

There are several reasons for this: 1. One have to go out of your way to set it up. 2. It can only be achieved when the rating difference is very high as it requires few pawn promotion(under). 3. The opponent also has to cooperate by not resigning. All these make it highly unlikely to occur by random chance.

[@stefanklass6763]

We could just call it a Specification, that’s synonymous with disambiguation

[@ElizabethGreene]

Hikaru's new life goal is to get the rarest moves. :)

[@krouchingtigerr]

The tape on the hand after punching the glass though… lol.

[@GiladBarkai]

The rarest would be the same with the 3 disambiguated knights, but it's a smothered mate.

[@SirSX3]

It doesn't matter, it won't show up on the notation

[@thatmspaintgirl]

"Disambiguated Bishop" is kinda terrifying.

[@WontonSlim]

I’m so excited for double disambiguate to become part of Hikarus daily lingo

[@zacharymcleod460]

It's crazy to think that each of these extremely rare chess moves are tens of thousands of times rarer than a royal flush.

[@rodriguekayal]

because texas has so little outs compared to chess it’s like chess but 2x2 instead of 8x8

[@zacharymcleod460]

@@rodriguekayal True, but also I guess there are a lot less Poker games than chess moves

[@dpend]

But if these rare moves become memes then they will be purposely played more often :-P They can all only happen in casual games anyway since you have to be semi-trolling to set them up and the opponent has to not resign. 😂

[@zacharymcleod460]

@@dpend Yeah, but as of this video, they are yet to be played. Hikaru did them though.

[@syn_ukraiiny]

Dear GM Hikaru, 46:56, you could also do it with discovery, but you need to promote pawn to Q/R on g8, pawn to Q in c8 => force black K to run c1-c2, while having Q in c4-c6 line (with no N there) between 2 bishops in c7 and c3, while 2nd Q in b line, 3rd Q/R in d line => Bc3xe5# Hope I am right)

[@What_Are_My_Odds]

literally me when hikaru says we're close "oh the videos almost done!" hovers over video bar "what the..."

[@rodrigomatias7486]

Bro really said “ O MY GOD! FUDGE ME!!!” LOL

[@Jordy40hands]

My brain hurts goodnight ggs

[@prasadt772]

It's just amazing that Hikaru can just blitz out the perfect scenario for a doubly disambiguated knight in the very first game. That too against a 2000 player. 😅🤣🤣🤣

[@whataboutthis10]

The opponent was rated 1000 tho

[@xiaowei1]

Trolling taken to a whole new level.

[@Shokoyle]

The rarest move in chess is to trash talk alireza 😂😂😂

[@theredshirts7245]

Actually by playing it once…it is no longer the rarest move.

[@fukhungyudarman3958]

"Time to double disambiguate someone" is one hell of a sentence lol

[@siddharthparkar5481]

This is an awesome video, definitely one of the best ever. Realising the rear moves and then intentionally adding them to the data. Take a bow. Even the one who did the research will be pleased to see this video. Someone please tag him or share the video with him.

[@whataboutthis10]

Data was from Lichess tho, so this wouldn't make it to the study

[@RomeoDemianWalker]

My favorite video of this channel! Double Congratulations Hikaru!

[@DownDance]

I think due to the video of someone explaining the rarest move, it'll become a lot less rare due to a lot of people attempting to double disambiguate their opponents

[@bobdepinguin]

when he said "Oh no kidding" y almost died from laugther 😆

[@2Complex2]

Hikaru at the start of this video: "tf is even this" Hikaru 20 minutes later: "Let's disambiguate him this way maybe? Hmm, that's tricky"

[@patrickdempsey7244]

this is absoutely wild to me

[@warehousedave7937]

Please do a double disambiguation speedrun!

[@ПерсонажВторогоплана]

I think this is the best video in the last two years

[@kentonevans]

I'm only about 10 minutes in, but I'm guessing it's a rare move that results in checkmating yourself.

[@LucenProject]

31:45 the ambiguity is in Which piece made the move. Ambiguous meaning standard notation would leave it to question which knight made the move. The disambiguation (removal of the ambiguity) is the change to notation to clarify. So it's not that the knight on C7 is "not disambiguated" so much as it would only require 1 adjustment to the notation to clarify that it made the move as oppose to 2 adjustments tot he notation (a double-disambiguation).

[@ferociouzbeats4147]

Lol this is the equivalent of crashing the tetris game in a way

[@kn_ow]

Double disambiguated sounds like an Old Testament Bible means of execution. "Thou shall be disambiguated until death, No wait! it shall be double disambiguation! "Nooooooo

[@vsadrn]

Oh wow, Kramnik is going to have a field day with this

[@luwi8125]

36:29 If you write the checkmate sign, then you know that it was not the knight on the 7th rank that moved. Thus, the checkmate sign disambiguates the rank so that you don't need to write Ne3xd5# and just write Nexd5#

[@mr_mr]

Hikaru unlocks a new game that is actually challenging

[@limwengfatt5004]

Wait hear me out!- “Double disambiguated bishop non capture *zugzwang stalemate* with *5 pawns on the board* “

[@clementmukuka8317]

Number 3 is crazy you are about 65x more likely to live to above 115 than you are to achieve that checkmate

[@ZDTF]

If I do it will I live to 115

[@davidanderson_surrey_bc]

@@ZDTF You're more likely to die in the moment of sheer joy.

[@ZDTF]

@@davidanderson_surrey_bc bruh

[@ShawFujikawa]

Statistical rarity is descriptive, not prescriptive, saying you're 'unlikely' to achieve that checkmate implies that chess games themselves are random when they're not. It's like claiming there's 1 albino in every 20,000 people so therefore you have a 1 in 20,000 chance to become albino which makes no sense. If you were picking out chess games at random looking for a doubly disambiguated bishop checkmate then yeah this would be rare.

[@RedShiftedDollar]

Disambiguation does not change the move. The notation simply serves to clarify which move is being made which is not the same as a completely different move. Disambiguation does not affect the rarity of the move, it only affects the rarity of the simplest way to describe the move.

[@veselinjokanovic3032]

This is peak content! For sure one of my favorite Hikaru videos.

[@wolfy2768]

Double Disambiguated Checkmate Speedrun soon!!