The only position I couldn't see a plan. Although I've analysed a couple of these positions before. I found the plan in the first one, since it's basically the only plan and it just involves understanding that Qa2 is the only way to break the position, and conceptualising how to defend. Once you understand that black cannot take a rook, the rest is easy.
Bongcloud is a psychological advantage not a positional one, so it's impossible for a computer to understand It has to be played against an opponent who doesn't expect it Catching them off guard is the advantage
@@dustinjames1268 how is there an advantage in exposing ur king immediately. White or black can just castle and then play for an attack by ramming his pawns.
@@dominusdone5023 It throws your opponent off their game Not only does it delay your development leaving them with nothing to respond to (thus more likely to make mistakes that you can punish) but it also allows you to analyze the playstyle and strategy they're attempting before you develop It's purely psychological. The position is obviously not in the favor of the bongcloud player, but in the hands of someone skilled like Hikaru or Bobby Fischer, it's a powerful opening. Its origins are much earlier than Hikaru, he was just the one to popularize it
@@dustinjames1268 the people that actually play the opening and survive are high level gms like hikaru. You would get crushed normally if your opponent knows what to do.
How can't Stockfish, one of the strongest chess engines in the world, better than any man or woman, able to see mates in 72 moves, analyse a closed position where all you need to do is move your king around, take the pawn not the bishop or just think about underpromotion
I ran the first scenario through Stockfish yesterday and it didn't exchange the pawn for a rook. It did take about 5 minutes of analysis, though, to see the correct move that leads to mate.
@@rk2280 No, i tried it with stockfish and it can start using the queen at 16th move. But i had to go a bit deeper in order to find the solution in 16 moves. Not much deeper tho, only 0.5 seconds and just in few moves.
Winning a game by memory is not beating an engine. You could just memorize a perfect chain of moves and since the engine will always play the same moves you would always win but try beating it on fisher random. Gl with that.
@@VylinJanKranBlanMichal obviously. What I meant was chess engines were comparable with the best humans more than 2 decades ago. Now any chess engine will absolutely obliterate any human.
The fact that Stockfish dev solves most of these puzzles, and the rest it solves weakly (evaluation is wrong, but the moves are correct) just shows how incredible state of the art engine it is.
Well, I took the time to download the latest version of Stockfish and let it run through these positions and, as surprising as it is, it did come up with the right ideas in every puzzle except for the first one (I was too lazy to wait for it). In some puzzles it is true that it evaluated the position as losing, or with an advantage for black, when it was a draw, but even in those cases its best move was the one showed in the video
@@Helmutiii Actually I just checked with my laptop's SF13 (with 5-man TB) and it found the correct moves to all except the Giri game where it took a more complicated approach (still won). For 2 of them even though it found all the right moves it's eval was wrong at the beginning for many moves...
@@Helmutiii But I don't think this video is clickbait since correct eval matters when it comes to the engine deciding to go for the starting position in the first place...
@@swollpenispok8172 Obviously not how it works. If you still don't believe me, you can go search "Crystal chess engine wiki". You can also find the GitHub page there
The first position is so beautiful! I admit that even though I've discover so many positions that engines cannot solve, this one is astonishing. Thanks Sam!
That first one was just asking too much. Stockfish normaly checks 18 moves into the future. You need to tell it to keep going and it should find it. Chess AIs aren't wrong about positions that require 20+ moves, they just arent allowed to look far enough ahead.
8:15 promoting the a-pawn to queen or rook leads to stalemate as the black bishop is pinned and the black king has nowhere to go... i would rather underpromote to a bishop instead and force the black rook to defend the back-rank... but in this position, moves like b4 or Ra6 makes more sense than underpromoting the a-pawn to bishop or knight.
the picture of a tournament briefly showed in this video brought back the feeling of the excitement I felt when I was attending chess tournaments during my younger years...
I once saw a mate in 87 or something crazy like that puzzle, which was completely forced, and not that hard to find, but ofc undetectable for an engine.
3:19 if you were wondering, Qb2+ doesnt work here because of the winning plan to get the other rook to b2 (Kd1, Re2, Ke1, Kf2, Re1, Rc1, Rc2, Rb2) to prepare b5 and infiltrate on the 4th rank. Giving up the b pawn first also works
so what happens in the first position if black just does the french move? also black could just capture the rook once we have moved the pawn then he can capture the pawn as well after
Here me out it might be stupid.. but could black just sack the queen at 3:30 and then the black king just shuffles up and down, you could never get a rook to the b file because the knight can never move?
Ahhh it doesn't work, I just figured it out, rook would end up on c2 and if you took with the pawn then you'd sack all your pawns until u promote.. otherwise the rook gets to the file nice one
Then you have chess engines that calculate evaluation by piece development, king safety etc. But not by what move the opponent can play to counter that move so computer eval still kinda sucks
Not true, in my opinion the engines play much more beautiful then human players. We all know, that SF 14 would easely destroy tal, so why is tals play more beautiful when it is just worse?
I am sorry, but in first position (fortress) there is still one chance for black what to play (so in time 3:47 it is not true that B pawn will deliver check mate so easily). You can stil play Qxb2 and at least prolong the game... b-pawn is not guarded any more and is also taken. And then there is little bit longer but still win for white using second rook...
That doesn't work because after Rhg1, regardless of whether or not the pawn promotes it will be captured by the rook and white will break through with the h-file open
My first impression on Position 1 is that you could play Rg2 and hope black takes but that is hope chess, the only real forcing line seems to be Qa2 and gobbling the pawns but it doesn't look like enough after black recaptures
I've been studying the hell out of the 1st position. With black putting up the fight by constantly blocking the pawn, white wades the rook between d1 and e1, it's a mate in 49. Eventually the black queen captures the rook, the white king captures back and the other rook has to be stepped by the pawn putting black in zugzwang again. With the horizon effect, it takes moves before Stockfish sees it's even a win for white, takes a while to see mate in 49. It sees mate in the 51st move, eventually on the 50th, then on the 49th. The white pawns move to allow the knights to break in the fortress and it's a win for white.
There's engines playing like expert but not understanding closed position, there's GMs not playing perfectly but understanding these positions, and there's me, neither of these
Can you imagine forgetting to play *b4* and *b5* before trapping black's queen in that first position? Black shuffling its king until it forces a 50-move-rule draw would be ATROCIOUS to sit through.
4th posistion: i see no reson as to why taking the "mad piece" makes stalemate, you can promote the queen and then make a ram with rook and queen against the bishop on e8, only move that prevents instant mate is if king is on f8 before said ram is madebc the rook after taking bishop would stop king e7 while putting king into mate due to the pawns suffocating the king to the single rank king wouldnt be able to take rook either bc queen defends
3:13 mate ur waffling the move is an-passant a4xb3 it protects the pawn attacks the rook unsoubles the pawns on the a file and reinstates the amazing pawn structure if rook takes a2 then pawn takes and now u have to play kb2 to stop making a queen and the a pawn is going nowhare as you still cant move youre knight
Sometimes very strong computer analysis engines are unable to win queen and minor piece against queen endgames with pawns on both sides in which the side that is a piece down has many checks. But to the very end of the game the engines persist in claiming the side that is a piece up is winning even when those engines are unable to win.
Let me add another very interesting position which is for computers impossible to understand because it appears as if it's not a blocked position, but even if in fact it isn't...in a way it is! --> 8/p3k3/2p5/1pPp4/3P4/PP1K2P1/3P1PBr/8 w - - 0 2 Here White only has a drawing move, that no engine finds, which is 1.Ke2!! with the idea that after 1...Rxg2 (of course whenever black plays ...b4, white replies with a4.) 2.Kf1 Rh2 3.Kg1 Rh8 (same is ...Rh7 Rh6 Rh5 or Rh3) 4.Kg2! followed by 5.f3!! and White has reached the key position where the Rook has no way to enter the White position, and it's a draw! Will engines one day be able to understand such finesses as this incredible one?
This position is wonderful. Who was the composer? I tested Stockfish from Lichess, it can't find the astonishing starting move Ke2 even after several minutes. After being forced to play 1.Ke2 Stockfish guesses the other moves of the line towards 5.f3 (even because they are very easy) but still it goes completely wrong with the evaluation, giving -3.8 and so a clear winning position for black.
After b4 and either axb3/cxb3 is done (doesn't matter which) you get Rxa2, bxa3, Kb2 will stop the promotion of the queen, and white can now advance to either a4/c4 depending on which pawn captured enpassent, allowing them to move their knight to either a3 or c3 and allowing the rook to escape via the b file
This first puzzle doesn't really work, black can sac his queen on b2 3:41 and then take the pawn and after that you can't sacrifice the rook because if you pass it on c2 dxc2 and after the king takes and black king does any move d4 won't get you anywhere...
Stockfish 13 understands position #1. Rooks on E1 and C2, King on C1, plays Qa2, which is captured, then b4. Depth 39, in 1 second: 1.Kd1 Kc6 2.Rg2 Kd5 3.Re2 Ke6 4.Rg1 Kf7 5.Ke1 Ke7 6.Kf2 Kf7 7.Re1 Ke6 8.Rg2 Kf6 9.Rc1 Ke7 10.Ke1 Kf7 11.Re2 Ke7 12.Kd1 Ke6 13.Re1 Kf6 14.Rc2 Ke7 15.Kc1 Kf6 16.Qa2 bxa2 17.b4 ... Afterwards, Black sacs the Queen for the Rook, to capture the passed pawn. White announces Mate in 23 (which will likely improved if I let it continue to think over a few minutes).
bishop d1. if game continues= possibly "double check mate". black queen c7= double checkmate . ive found the most incredible draw ever. remove queen and f4. black pawn on black pawn on white. even if it looks like the black king is checkmated, the black king is actually not checkmated ...
3:37 Doesn’t kb5 and Qxb2 force a draw? White pawns can’t move. White knights can’t move rook can shuffle back and forth or sacrifice but two knights can’t force mate unless black have legal moves other than king or make smothered mate which can’t happen here. And King just shuffle back and forth.
10:50 what if black doesn‘t take white‘s rook but plays rook A4 with check? shouldn‘t he then be able to give unlimited checks and if white captures black‘s rook it‘s stalemate?
After Rxa4 and Kxa4 the rook on e6 can and must be captured (only legal move) and the black king is not in stalemate. The resulting king and lawn endgame is winning for white
Actually, because of Black’s pawn on g3 stopping king and pawn movement for white, and the bishop being pinned, white has no legal moves, and thus the game draws
@@unseenasymptote4976 ok how about this: remove the queen from the 1st rank. Now the bishop is not pinned. Now push c and d pawns until they are safe enough for promoting. Then sack the queen on g1 and after king takes g1 you can promote with checkmate.
@@siddhantjhaveri If the bishop isn’t pinned then it will be free to capture the pawns if they move forward. Because the pawns are both one square from the bishop’s diagonal there is no way for them to move forward safely. If the queen captures the bishop on that diagonal then the queen will be targeting g8, once again leaving white with no legal moves, triggering stalemate
4:38 what if here instead of capturing the rook, play bb3 to block the white pawn from proceeding! Like this White's trick doesn't work anymore and he will lose a piece and Black's rook still be free
In the first position, when the pawn is about to promote and black king cant take it, why not play Qxb2+? That way white must play Kxb2, and the black can capture the pawn before it promotes. After this, we have a stalemate again because white cannot move the remaining rook.
8:10 wow took me a while to see why that is not a bad move (rook hangs), interesting. Everything else about this position also makes my favorite beautiful one to me personally here.
In the first board couldn't look sacrifice on G2 and then the other book goes G1 to capture the pawn and then the last rook can make its way around to capture pawns?
last one was just wow!! i am a bit sad that i didnt pause and try to find that beauty by myself even if takes me days, all the other one i have solved but last one would be amazing if i saw that Bf2 after Qf8 defence, anyways thanks for amazing puzzles and i hope i will see some more puzzles like this in near future :)
If the d3 pawn takes the R on C2 then white can eventually play d3. Then no matter what black does, white has freed his d2 square for his knights to maneuver back into the game. After this it is a trivial win for White.
On the first board, I'm a little unsure. If you shuffle the King a5 to b5, then ... bxa2, b4 axb. At this point white can't get a rook behind his passed pawn, and a4 Na3 can be met with ... a1=Q+, rb1 Qxa3+ ... I'm assuming there's a forced win there somewhere, but its not trivial...
In your position from 1938, Stockfish 14 finds a8B at depth 61 (31st move) using ~6min on my hardware. In the last position, your comment about engines thinking black is winning is not the correct way to think about it. For most engines, such as with Stockfish, it indicates the score is -4 (black winning) but that is only the measure of material. When an engine REALLY knows it is a draw, it will show a score of zero. But in order to get there, it needs to exhause every single one of the lines that lead to stalemate and there are millions. If you use an engine, you'll see that the moves they find are actually correct, they just don't have the time to prove it is a draw. Good stuff though. In the 2012 game, engines mostly like h4, but i didn't have time enough to check it deeply...will comment later!
I think the main problem for the engine is that they are not "connecting" the lines. Like when a human analyses the lines, they do the first moves and then understand at some point that they all lead to the same line they already analysed. Which is why it takes less time. The engine is treating each line as its own line I would assume and therefore, even if there is just a move difference, it calculates it as far as it can.
That first position is making me suffocate.
Same here like hell, made me feel sick
like i genuinely felt uncomfortable looking at it
@Vishesh Gautam It's the exact opposite of satisfactory.
I spent so long seeing if en passant was a good move for black, but I cant calculate it
Quite literally
Last position is just beautiful
69 likes 👏
The only position I couldn't see a plan. Although I've analysed a couple of these positions before.
I found the plan in the first one, since it's basically the only plan and it just involves understanding that Qa2 is the only way to break the position, and conceptualising how to defend. Once you understand that black cannot take a rook, the rest is easy.
I am thankful for your likes.
the suffocate comment is right above this one for me, how coincidental lmaoo
Position where chess engines are wrong: Bongcloud
Bongcloud is a psychological advantage not a positional one, so it's impossible for a computer to understand
It has to be played against an opponent who doesn't expect it
Catching them off guard is the advantage
@@dustinjames1268 how is there an advantage in exposing ur king immediately. White or black can just castle and then play for an attack by ramming his pawns.
@@dominusdone5023
It throws your opponent off their game
Not only does it delay your development leaving them with nothing to respond to (thus more likely to make mistakes that you can punish) but it also allows you to analyze the playstyle and strategy they're attempting before you develop
It's purely psychological. The position is obviously not in the favor of the bongcloud player, but in the hands of someone skilled like Hikaru or Bobby Fischer, it's a powerful opening.
Its origins are much earlier than Hikaru, he was just the one to popularize it
@@dustinjames1268 is it why the engine evaulates it as pretty much completely lost?
@@dustinjames1268 the people that actually play the opening and survive are high level gms like hikaru. You would get crushed normally if your opponent knows what to do.
How can't Stockfish, one of the strongest chess engines in the world, better than any man or woman, able to see mates in 72 moves, analyse a closed position where all you need to do is move your king around, take the pawn not the bishop or just think about underpromotion
It probably doesn't see it at low depth.
I ran the first scenario through Stockfish yesterday and it didn't exchange the pawn for a rook. It did take about 5 minutes of analysis, though, to see the correct move that leads to mate.
Only Alpha Zero can.
Move your king around? That alone is 8 possible moves per depth. Number of possible moves grow like crazy
@@rk2280 No, i tried it with stockfish and it can start using the queen at 16th move. But i had to go a bit deeper in order to find the solution in 16 moves. Not much deeper tho, only 0.5 seconds and just in few moves.
This means to beat a chess engine we must get to one of these endgames
Winning a game by memory is not beating an engine. You could just memorize a perfect chain of moves and since the engine will always play the same moves you would always win but try beating it on fisher random. Gl with that.
Not even Magnus could last until endgame with the latest Stockfish, Commodo or really whatever modern up-to-date engine you choose.
@@VylinJanKranBlanMichal latest? Lol even deep blue from 1997 would probably beat Magnus.
@@siddhantjhaveri so a newer release would do it with an even greater ease, wouldn't it?
@@VylinJanKranBlanMichal obviously. What I meant was chess engines were comparable with the best humans more than 2 decades ago. Now any chess engine will absolutely obliterate any human.
First position is normal when you are a beginner
Underrated comment
Hindi naman
That last puzzle position is a thing of beauty
If you’re wondering about gxf2 at 14:14, white plays g3+ and both Kxg3 and Kh3 are stalemate because of the pawn that just captured the bishop
Thank you! I was wondering why that ended up as stalemate too, but it makes sense as it's the same idea as the final queen sac
The fact that Stockfish dev solves most of these puzzles, and the rest it solves weakly (evaluation is wrong, but the moves are correct) just shows how incredible state of the art engine it is.
Stockfish had a stroke calculating this
me too.
Then stockfish choked and died. Rip Stockfish
not true, just download stockfish 14 and try it on your own.
@Utsav Joshi No it doesn't. The only way stockfissh would know this is because some famous positions are programmed into engines.
Well, I took the time to download the latest version of Stockfish and let it run through these positions and, as surprising as it is, it did come up with the right ideas in every puzzle except for the first one (I was too lazy to wait for it). In some puzzles it is true that it evaluated the position as losing, or with an advantage for black, when it was a draw, but even in those cases its best move was the one showed in the video
the engine also evolve
Stockfish 13 found all the right moves with little to no effort.
Yes! I'm fun at parties, leave me alone! :c
you must be fun at parties
Sometimes these famous positions are added to engines and this is why they know the solution
its about the evalutions, he said in the video the engine will say black/white is better not that it wont find the best moves.
Checking the data is sexy change my mind
StockFish 14 in depth 40 says -5.6 advantage for black in 5th position. And as a 1400 rated played i just realized it is draw.
Stockfish: Best chess engine
Also stockfish:
Crystal: My moment to shine... 😂
@@fahimp3 lol
@@Helmutiii Actually I just checked with my laptop's SF13 (with 5-man TB) and it found the correct moves to all except the Giri game where it took a more complicated approach (still won). For 2 of them even though it found all the right moves it's eval was wrong at the beginning for many moves...
@@fahimp3 that's wired😂
@@Helmutiii But I don't think this video is clickbait since correct eval matters when it comes to the engine deciding to go for the starting position in the first place...
Crystal, a chess engine forked from Stockfish understands these positions
How does it work?
@@yit6 Well, I don't exactly know everything about it. But what I understand is that it prunes less aggressively. There's probably more into it
@@swollpenispok8172 Yes it does. It's a chess engine specifically made to detect fortresses and solve difficult positions
@@swollpenispok8172 Obviously not how it works. If you still don't believe me, you can go search "Crystal chess engine wiki". You can also find the GitHub page there
@@swollpenispok8172 no. Not how things work.
The first position is so beautiful! I admit that even though I've discover so many positions that engines cannot solve, this one is astonishing. Thanks Sam!
It makes me feel claustrophobic!
@@leemarshal3329 i would have felt claustrophobic if white couldn't have won it. But White did win.
I know I’m making progress when seeing some of these positions makes me feel actually claustrophobic
That Giri game is amazing.
That first one was just asking too much. Stockfish normaly checks 18 moves into the future. You need to tell it to keep going and it should find it. Chess AIs aren't wrong about positions that require 20+ moves, they just arent allowed to look far enough ahead.
2:51 i feel so claustrophobic just watching it
I tested all of those positions and SF 14 was able to come up with all of them in a couple of seconds
Of course.
But most people will not factcheck these things.
I like these studies a lot.Hoping more videos come out about the topic
8:15 promoting the a-pawn to queen or rook leads to stalemate as the black bishop is pinned and the black king has nowhere to go... i would rather underpromote to a bishop instead and force the black rook to defend the back-rank... but in this position, moves like b4 or Ra6 makes more sense than underpromoting the a-pawn to bishop or knight.
After b4 or Ra6, there's Rc8 and Ra8.
the picture of a tournament briefly showed in this video brought back the feeling of the excitement I felt when I was attending chess tournaments during my younger years...
I once saw a mate in 87 or something crazy like that puzzle, which was completely forced, and not that hard to find, but ofc undetectable for an engine.
Engines can go to depth 100 if you give them enough time, offcourse our pc's wont, but an engine can still solve it.
@@bumboyy if the opponent move, mate is 1 move closer since its forced
@@bumboyy after 50 moves, it would be a draw, it pointless going any further
3:19 if you were wondering, Qb2+ doesnt work here because of the winning plan to get the other rook to b2 (Kd1, Re2, Ke1, Kf2, Re1, Rc1, Rc2, Rb2) to prepare b5 and infiltrate on the 4th rank. Giving up the b pawn first also works
so what happens in the first position if black just does the french move? also black could just capture the rook once we have moved the pawn then he can capture the pawn as well after
(en passant by either pawn) Rxa2 bxa2 Kb2 and white is winning.
What happens if Black doesn't promote the pawn but instead takes the rook on c2?
Here me out it might be stupid.. but could black just sack the queen at 3:30 and then the black king just shuffles up and down, you could never get a rook to the b file because the knight can never move?
Not only that but the black king could take the pawn no problem
Ahhh it doesn't work, I just figured it out, rook would end up on c2 and if you took with the pawn then you'd sack all your pawns until u promote.. otherwise the rook gets to the file nice one
"Chess engines destroy the beauty of chess" - IM Levy Rozman
Then you have chess engines that calculate evaluation by piece development, king safety etc. But not by what move the opponent can play to counter that move so computer eval still kinda sucks
Crystal: Not so fast with your smug comment...
You’re right. Engines like AlphaZero and Lela really sap the beauty out of chess with their romantic, anti-materialistic play.
@@Corteum Viswanathan Anands famous quote goes something like, "for every door the engines have closed they've opened a new one."
Not true, in my opinion the engines play much more beautiful then human players.
We all know, that SF 14 would easely destroy tal, so why is tals play more beautiful when it is just worse?
That last one is insane, really beautiful
I am sorry, but in first position (fortress) there is still one chance for black what to play (so in time 3:47 it is not true that B pawn will deliver check mate so easily). You can stil play Qxb2 and at least prolong the game... b-pawn is not guarded any more and is also taken. And then there is little bit longer but still win for white using second rook...
correct
What happens in the first position after b4 by white if there is a en passant capture by either Pawn?
White forfeits
Holy hell
Thanks, I should have set it up and tried to work it out
White forfeits because en passant is too powerful
@@DaGaJbmKojJe ah, a member of anarchy chess
My chess engine was capable of solving all these chess puzzles and said the same moves
2:14 you forgot pawn takes rock on g2 with a fork and then promotes to a queen.
That doesn't work because after Rhg1, regardless of whether or not the pawn promotes it will be captured by the rook and white will break through with the h-file open
Title: Top 5 positions engines don't understand.
Me(a human):Also don't understands
Me:Maybe I am an Engine.
My brain: 🗿Stonks↗️
My first impression on Position 1 is that you could play Rg2 and hope black takes but that is hope chess, the only real forcing line seems to be Qa2 and gobbling the pawns but it doesn't look like enough after black recaptures
elon was right chess is easy, kapp
I've been studying the hell out of the 1st position. With black putting up the fight by constantly blocking the pawn, white wades the rook between d1 and e1, it's a mate in 49. Eventually the black queen captures the rook, the white king captures back and the other rook has to be stepped by the pawn putting black in zugzwang again. With the horizon effect, it takes moves before Stockfish sees it's even a win for white, takes a while to see mate in 49. It sees mate in the 51st move, eventually on the 50th, then on the 49th. The white pawns move to allow the knights to break in the fortress and it's a win for white.
Great content.
Thank you.
There's engines playing like expert but not understanding closed position, there's GMs not playing perfectly but understanding these positions, and there's me, neither of these
I always hated that stalemate was a draw but if it weren’t for that these sort of positions wouldn’t work
Hmmmmm stockfish 13 solve the first though I'm trying to do the rest later
Can you imagine forgetting to play *b4* and *b5* before trapping black's queen in that first position? Black shuffling its king until it forces a 50-move-rule draw would be ATROCIOUS to sit through.
3:12 it is important to not that if black takes the rook instead of queening white MUST move the king to b2 or all is lost.
We need part 2!!🔥
4th posistion: i see no reson as to why taking the "mad piece" makes stalemate, you can promote the queen and then make a ram with rook and queen against the bishop on e8, only move that prevents instant mate is if king is on f8 before said ram is madebc the rook after taking bishop would stop king e7 while putting king into mate due to the pawns suffocating the king to the single rank king wouldnt be able to take rook either bc queen defends
After you take the "mad piece" it is an instant stalemate. You have no more moves to do anything you mentioned here
3:13 mate ur waffling the move is an-passant a4xb3 it protects the pawn attacks the rook unsoubles the pawns on the a file and reinstates the amazing pawn structure if rook takes a2 then pawn takes and now u have to play kb2 to stop making a queen and the a pawn is going nowhare as you still cant move youre knight
White still wins there.
@@game_ender4317 no it dosnt
give me the line bro
Sometimes very strong computer analysis engines are unable to win queen and minor piece against queen endgames with pawns on both sides in which the side that is a piece down has many checks. But to the very end of the game the engines persist in claiming the side that is a piece up is winning even when those engines are unable to win.
Let me add another very interesting position which is for computers impossible to understand because it appears as if it's not a blocked position, but even if in fact it isn't...in a way it is! --> 8/p3k3/2p5/1pPp4/3P4/PP1K2P1/3P1PBr/8 w - - 0 2 Here White only has a drawing move, that no engine finds, which is 1.Ke2!! with the idea that after 1...Rxg2 (of course whenever black plays ...b4, white replies with a4.) 2.Kf1 Rh2 3.Kg1 Rh8 (same is ...Rh7 Rh6 Rh5 or Rh3) 4.Kg2! followed by 5.f3!! and White has reached the key position where the Rook has no way to enter the White position, and it's a draw! Will engines one day be able to understand such finesses as this incredible one?
This position is wonderful. Who was the composer? I tested Stockfish from Lichess, it can't find the astonishing starting move Ke2 even after several minutes. After being forced to play 1.Ke2 Stockfish guesses the other moves of the line towards 5.f3 (even because they are very easy) but still it goes completely wrong with the evaluation, giving -3.8 and so a clear winning position for black.
thats honestly beautiful, an amazing position
Yea I found Ke2 instantly because I started to read your description qhile copying the fen in lichess and Ke2 is third choice of SF
What kind of profile pic is that 😂
Your photo profil is mad sus
The last one is a masterpiece and is just unbelievable!
In the 1st position why Enpassant with "a" pawn was not done
After b4 and either axb3/cxb3 is done (doesn't matter which) you get Rxa2, bxa3, Kb2 will stop the promotion of the queen, and white can now advance to either a4/c4 depending on which pawn captured enpassent, allowing them to move their knight to either a3 or c3 and allowing the rook to escape via the b file
I've tryed every position and my Stockfish 14 engine, on my Mobile Phone, did solve them all (after finding rhe right time control).
This first puzzle doesn't really work, black can sac his queen on b2 3:41 and then take the pawn and after that you can't sacrifice the rook because if you pass it on c2 dxc2 and after the king takes and black king does any move d4 won't get you anywhere...
But in that case you play d2-d3 instead of d2-d4 to make sure the position opens up ...
In the first position, what if black sacrifices his queen for the rook and then king takes pawn
Me: *scratches head wondering how that first position even happened*
The new Stockfish 15.1 immediately finds the draw on the last puzzle
Stockfish 13 understands position #1. Rooks on E1 and C2, King on C1, plays Qa2, which is captured, then b4. Depth 39, in 1 second:
1.Kd1 Kc6 2.Rg2 Kd5 3.Re2 Ke6 4.Rg1 Kf7 5.Ke1 Ke7 6.Kf2 Kf7 7.Re1 Ke6 8.Rg2 Kf6 9.Rc1 Ke7 10.Ke1 Kf7 11.Re2 Ke7 12.Kd1 Ke6 13.Re1 Kf6 14.Rc2 Ke7 15.Kc1 Kf6 16.Qa2 bxa2 17.b4 ...
Afterwards, Black sacs the Queen for the Rook, to capture the passed pawn. White announces Mate in 23 (which will likely improved if I let it continue to think over a few minutes).
3:09 le pase is possible for black so he can protect pawn
bishop d1. if game continues= possibly "double check mate".
black queen c7= double checkmate . ive found the most incredible draw ever. remove queen and f4. black pawn on black pawn on white. even if it looks like the black king is checkmated, the black king is actually not checkmated ...
The perpetual check with the rook is evadable if you find a way to capture with your queen
3:37 Doesn’t kb5 and Qxb2 force a draw? White pawns can’t move. White knights can’t move rook can shuffle back and forth or sacrifice but two knights can’t force mate unless black have legal moves other than king or make smothered mate which can’t happen here. And King just shuffle back and forth.
I think you can bring the other rook to replace the rook
Great idea for a video! thanks
wait in the first puzzle, what if they sack the Black Queen for the rook, now Black can just take the white pawn
3:12 im curious as to why black doesnt just en passent capture the pawn on b4 to defend the other pawn and and threaten to take the rook
At 10:27 cant the rook still take the bishop as pawn capture will be stalemate.
Why would you take the rook tho?
@@petrwalek9901 I must have been tired i forgot that white could just checkmate lol.
where can we get these positions if we want to try on the board
well, they’re right there
3:15 what if black promotes to a knight though?
14:13 i dont get how capturing with pawn is stalemate
@BluBlo i still dont get it
@BluBlo aaaahhhhh
@@rafaelshoguerra29 cuz after the bishop is captured only legal move for white is g3 and the pawn has to be captured leading to stalemate
Giri's game is from candidates.
In the first game isn't black able to hold on by taking en passant with the pawn on a4 and then moving the a2 pawn ?
3:10 why pawn f4 and not f3, why don't the opponent take en passant ? defending the pawn
Sometimes you just guess the winning move easily. But then you have no plan.
Why is the black pawn on h3 not taking the rook g2 when he brings the rook there?
10:13 why here black didn't take the bishop with the rook?
Isn't that what he wants to trade his rook?
3:15 illegal move, a3xb3 or c3xb3 is forced by all rules of chess
10:50 what if black doesn‘t take white‘s rook but plays rook A4 with check? shouldn‘t he then be able to give unlimited checks and if white captures black‘s rook it‘s stalemate?
After Rxa4 and Kxa4 the rook on e6 can and must be captured (only legal move) and the black king is not in stalemate. The resulting king and lawn endgame is winning for white
13:49 you can push pawns because bishop is pinned and you can make 2nd queena nd take whites last pawn and win the game
Wdym? Black has no moves
Actually, because of Black’s pawn on g3 stopping king and pawn movement for white, and the bishop being pinned, white has no legal moves, and thus the game draws
@@unseenasymptote4976 ok how about this: remove the queen from the 1st rank. Now the bishop is not pinned. Now push c and d pawns until they are safe enough for promoting. Then sack the queen on g1 and after king takes g1 you can promote with checkmate.
@@siddhantjhaveri If the bishop isn’t pinned then it will be free to capture the pawns if they move forward. Because the pawns are both one square from the bishop’s diagonal there is no way for them to move forward safely. If the queen captures the bishop on that diagonal then the queen will be targeting g8, once again leaving white with no legal moves, triggering stalemate
In the final example why can black not capture on g2 with the queen?
14:11 if pawn takes bishop then H2 is freed for the king right? So it isn't stalemate also the pawn can now move aswell
For the first one room g1 if pwan takes h3 takes g4 takes f5 so on so forth with wight to promote to queen
3:12 Do En Passant ! promoting queen is Simply a blunder
In the first person why didnt enpassant occur in response to b4?
4:38 what if here instead of capturing the rook, play bb3 to block the white pawn from proceeding!
Like this White's trick doesn't work anymore and he will lose a piece and Black's rook still be free
Last one is great!
In the first position, when the pawn is about to promote and black king cant take it, why not play Qxb2+? That way white must play Kxb2, and the black can capture the pawn before it promotes. After this, we have a stalemate again because white cannot move the remaining rook.
8:10 wow took me a while to see why that is not a bad move (rook hangs), interesting.
Everything else about this position also makes my favorite beautiful one to me personally here.
Make a video on Vishwanathan Anand's top 5 queen sacrifices.
3:07 why promotion queen when he can “elpassan” or how its called !
bc rook b2 gives white a free path out
After en passant: 1. Rxa2 bxa2 2.Kb2 +-
In the first board couldn't look sacrifice on G2 and then the other book goes G1 to capture the pawn and then the last rook can make its way around to capture pawns?
last one was just wow!! i am a bit sad that i didnt pause and try to find that beauty by myself even if takes me days, all the other one i have solved but last one would be amazing if i saw that Bf2 after Qf8 defence, anyways thanks for amazing puzzles and i hope i will see some more puzzles like this in near future :)
What is in the first position after white plays b4, what if black plays axd3, or cxd3?
The first position gave me claustrophobia
Can someone answer me who is winning after Black en-passants in the first position. Bc en-passant is possible and I don't think Sam mentioned that.
White still wins after rook captures pawn captures Kb2
Wow I never thought that a bishop promotion would come in handy at any position!!
Amazing solution for the 4th puzzle 😲😲😲
in first poistion instead of promoting
Why the pawn on d3 just take the rook on c2?
ya even i was thinkinng that
If the d3 pawn takes the R on C2 then white can eventually play d3. Then no matter what black does, white has freed his d2 square for his knights to maneuver back into the game. After this it is a trivial win for White.
This makes me feel so good about myself
Why
On the first board, I'm a little unsure. If you shuffle the King a5 to b5, then ... bxa2, b4 axb. At this point white can't get a rook behind his passed pawn, and a4 Na3 can be met with ... a1=Q+, rb1 Qxa3+ ... I'm assuming there's a forced win there somewhere, but its not trivial...
What? King on b5 will not help.. cannot stay there.. black has to move and it will be the king who moves..
In your position from 1938, Stockfish 14 finds a8B at depth 61 (31st move) using ~6min on my hardware.
In the last position, your comment about engines thinking black is winning is not the correct way to think about it. For most engines, such as with Stockfish, it indicates the score is -4 (black winning) but that is only the measure of material. When an engine REALLY knows it is a draw, it will show a score of zero. But in order to get there, it needs to exhause every single one of the lines that lead to stalemate and there are millions. If you use an engine, you'll see that the moves they find are actually correct, they just don't have the time to prove it is a draw.
Good stuff though.
In the 2012 game, engines mostly like h4, but i didn't have time enough to check it deeply...will comment later!
I think the main problem for the engine is that they are not "connecting" the lines. Like when a human analyses the lines, they do the first moves and then understand at some point that they all lead to the same line they already analysed. Which is why it takes less time. The engine is treating each line as its own line I would assume and therefore, even if there is just a move difference, it calculates it as far as it can.
Wonderful thanks Sam. It will be interesting to see _when_ Stockfish &co. can see these positions and be able to solve then.
5:44 why the white king didn't take the pawn???
6:35 is just amazing.