An Ancient Chess Puzzle That Engines CAN'T Solve!
Ғылым және технология
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In this video lesson, GM Igor Smirnov shows you a very interesting ancient chess puzzle that even modern day chess engines, monstrous computers cannot solve. This puzzle (the first puzzle shown in the video) was composed by Gioachino Greco in 1623.
Even an intermediate level chess player would be able to solve this, but Stockfish is having a very hard time solving this puzzle. Stockfish 12 gives the evaluation of +3.13 in favour of White, Stockfish 14 evaluates the position as +2.8, however only Stockfish 15 could rightly evaluate the position as a draw.
Feel free to pause the video and try to solve this puzzle if you can - it's Black to play and draw. Are you better than chess engines? 😎
▬▬▬▬▬▬
► Chapters
00:00 Chess Engines Couldn't Solve This Puzzle
00:43 Stockfish Engine's Incorrect Evaluation
01:48 Black's powerful move for the draw!
03:19 Computer got confused
03:42 Can you solve this puzzle?
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#GMSmirnov #ChessPuzzle #ChessPuzzles
Пікірлер: 133
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Your cat has moved!
@jasonuerkvitz3756
2 жыл бұрын
Stretch. Rotate. Collapse. Curl. Sleep.
@edlawrence5059
2 жыл бұрын
The cat with no name. Igor is too arrogant to reveal its name, though I've asked on more than one occasion.
@jasonuerkvitz3756
2 жыл бұрын
@@edlawrence5059 Perhaps it is Miktail Catnovik.
@selfless727
Жыл бұрын
Cats name is Gary
@peterjuhl-yh3ne
Жыл бұрын
Where did cat move?
Puzzle 2: position your queen a knight's step away from the white king until cornered. This forces the bishop to c8. Take the bishop on c8 and this will force the second bishop to b7, checking black king. Move black king back to b8 which forces the bishop again to move either back to a8 or instead to c8. Do not take the bishop yet. First check the white king in such a way that it will not be a stalemate after your next move. Once they move the king, take the bishop and proceed to checkmate with your king and queen or however you see fit at that point.
@allentan5400
Жыл бұрын
Ngl I thought it was queen take bishop stalemate but I forgot white pawn take freeing my other pawn😅
@khai96x
Жыл бұрын
You can also leave the second bishop alive to ensure no stalemate, then as that bishop uselessly moving back and forth, you slowly march your king toward the opponent king, menacingly.
@calencrawford2195
6 ай бұрын
An alternate solution is doing the knight step queen thing to put white into a stalemate, then taking the bishop with black's leader, the white diagonal piece gives a check and black moves out of jail ready to deliver checkmate with a queen while white has to shuffle.
Second puzzle, Q b2 check. Zugzwang via keeping a knight distance of black queen and white king, force the white king into h8 and black queen on g6 or f7. Then white bishop moves to c8, take it with the king. Other white bishop checks on b7, kd8, then just march to kf8, the bishop cannot stop your king. Then just mate the trapped king. The bishop cannot do anything.
There is a dark squared bishop on the board which identifies itself as a light squared bishop :-)
@anonymouslearner2454
Жыл бұрын
😂
@nikolamarkovic9100
Жыл бұрын
Yeah puzzle is imaginary not real chess situation
@Freeman0log
Жыл бұрын
@@nikolamarkovic9100 a pawn could become the second light square bishop, so technically it's actually possible
1...Ra1+ 2.Rfi Rxf1+ 3.Kxf1 Bh3 4.gxh3 (4.Kf2 Bxg2) then the black king must go on h8 sguare. Don't forget an endgame principle that wrong bishop and flank pawn is a draw.
You can use the Queen to shepherd the King into a corner, "stalemating" it and leaving White in zugzwang.
@undiscoveredTop_G07
Жыл бұрын
In Zugzwang?
@xenlol
Жыл бұрын
@@undiscoveredTop_G07 self sabotage
@undiscoveredTop_G07
Жыл бұрын
@@xenlol isn't zugzwang a german word?
@xenlol
Жыл бұрын
@@undiscoveredTop_G07 yep! zug means move, and zwang means compulsion, meaning the opponent MUST make a move that worsens their position, or self sabotage.
@undiscoveredTop_G07
Жыл бұрын
@@xenlol yes I know I'm from Germany🤣 but I didn't know that you can say that in English too
My guess for the second puzzle would be using the queen to force the king into the lower left corner and stalemate it by going to g6, at which point white has to play b.c8, take it with your king, then the second bishop has to move to b7, king back to b8 and after that, the bishop has to move to either c8 or a8, at which point taking it with your king would result in a draw. Instead, if the bishop moves to c8, the queen can simply take the unprotected pawn on c6 and win, if instead they move to a8, then Q.b1 forcing the bishop back to b7 at which point Qxb7 and after either their C pawn or A pawn takes it back, pushing your own pawn while their king is too far to do anything about it. I'm quite mediocre at chess but I think that's not too far off and I feel pretty proud about that. :p
@libercivis4357
2 жыл бұрын
*Yes, your solution is good, it works!* As an alternative, instead of giving the Queen in b7 (an elegant solution!), you simply could give a check to the white king to force him out of the stalemate, then your king can take the bishop without problems.
@rockmcdwayne1710
Жыл бұрын
@@libercivis4357 I dont really see a way how to force the king into the corner. It can just hop around circles in the middle and its gonna be draw?!
@EmptyJarDoto
Жыл бұрын
@@rockmcdwayne1710 it can't hop in circles. Probably the first thing you learn in chess is king and queen mate and you can force a king to move to a corner with just a queen following the king a knight's move away.
@rockmcdwayne1710
Жыл бұрын
@@EmptyJarDoto Im not sure if im blind but, do explain me how king and queen mate is remotely possible in this puzzle? Black king cannot move! You only have queen against white king. Queen alone cant force white king into corner! What ever the solution, its something else!
@EmptyJarDoto
Жыл бұрын
@@rockmcdwayne1710 That means you haven't learned the first thing you learn in chess. King and queen mate. Queen alone can easily force the king into a corner. That's how you do king and queen mate. You first force the king into a corner and then come with your king to mate.
This is a 8 men position that can be reduced in 2 moves in a 6 men position that is a draw. Any engine (not necessary top level) with 6 men TB access find the solution since several years. In fact since the SSD technology allow fast access to TB. Since it is not so difficult to have 6-men TB at home, I think that the video title is wrong. Only access to 7 men remains difficult now since these TB are very large.
Solution to the second puzzle: Use the queen to limit the kings movements till the king can’t move, white has to move the bishop, check the white king, white king moves, take the bishop with the king. Then repeat the process for the second bishop. You can start with Qb4, depending where the king moves you can immobilize it in a5, h8, or d8.
I'm using Stockfish 11 on a common computer. It found the solution in about 1/10th of a second, and evaluated the position at 0.13. I have yet to see someone say "And Stockfish can't figure it out" and be right.
If black can move white's g-pawn to h-file, the "wrong" bishop can't help the doubled pawn to reach promotion square. The question now is how to force this g-pawn to jump to h-file. The details look like this: 1. ... Ra1 2. Rf1 (forced) Rxf1+ 3. Kxf1 Bh3. And with h-pawn and light-square bishop, white can't win/promote pawn.
The answer is to force the white king into a corner by placing your queen a knight's move away from the white king. The king will have no choice but to recede closer and closer to the corner until pinned in the corner unable to move. At that point, white must move it's Bishop and let the Black King capture it. There are a lot of ways to win at that point but capturing the second white Bishop while the king is trapped is a stalemate, so don't do that. The easiest win from there is to move your Black King up to c1 to checkmate with the queen. The lone Bishop can't stop you.
Nice Puzzle! It's really good to watch your videos. I hope I can be half as good player as you are. More Power to you, hope you double your subcribers in three months time.
It's queen b2 check and when the king moves the queen will chase the king like a knight (if the queen is a knight it will be a check) then when the king has no move he is forced to move one of his bishops and it is the b7 bishop to c8 then u will capture it with the king and then the a8 bishop has to move to b7 then u will move ur queen to a square that the king can't move. Then the bishop will sacrifice himself then u will fork the king and bishop with ur queen and capture the 2 pawns and win!
I think for the chess puzzle at the end of the video, you need to check the king such that it's stalemate but the queen will have access to the c7 square so that when white is forced to move the bishop the queen can take it when the king can't move
@johnflores1616
2 жыл бұрын
If we R talking about the same puzzle c7 is the Queens pawn & can't B taken bcuz the King is guarding it?
@joshpinchuk7061
2 жыл бұрын
@@johnflores1616 You have to check the king and move it to a position where it's in the zusesng
@anonymouslearner2454
Жыл бұрын
@@joshpinchuk7061 C8 mate?
@MTlelek
Жыл бұрын
you can get any queen stalemate, then when the bishop moves, dont take it, but give queen check to stop stalemate, and then take the bishop
i found the second one! all you have to do is use the queen to force the king into a corner where it cant move, then it is zuxwong for black, and they must give up their bishop, once king takes then the other bishop has to move to the other square to check the king, white king moves towards the black king while the bishop just shuffles between 2 squares and then you can checkmate with king+queen
Just checked with Stockfish online that is not even using a tablebase, and both puzzles were solved in a split second...
An engine, when there are few pieces on the board will find straight away the advantage giving +10 or even +60 with mate in few. When it gives you +2 and only 7, 8 pieces left, it is usually draw, just counting the material as advantage.
king A4 would have worked too. The tower could go to the 7th line to protect more...exchange bishops and capture one pond and block the other one
for the second puzzle, my guess would be saccing the queen on c6 then after Bx, your king can escape... beyond that idk
Its a draw after exchanging rooks at Ra1. Blacks second move is Bh3..the double pawn at h file cannot promote to a queen because of wrong color of bishop
Lichess' Stockfish almost instantly solved the first Position. Maybe you should use a Computer that is not build before the 21st century
I actually got the first puzzle bro 🤯 I remember yesterday I watched the thing where if you can solve this u r a GM, and I want to be one but I got discouraged because I didn’t solve it, this made me feel just a little better
Puzzle #1 While the solution is easy, it reminds me of a famous Aronian endgame that is rather mindblowing.
Not sure if this is correct but this is what worked against world master level stockfish(black to start): 1.Qb2+ , Kf4 2.Qf6+ , Ke3 3.Qe6+ , Kd2 4.Qd6+ , Kc2 5.Qc5+ , Kd2 6.Qd4+, Kc1 7.Qd3 , Kb2 8.Qc4 , Ka3 9.Qb5 , Bc8 10.Kxc8 , Bb7+ 11.Kd8 , Ka2 12.Ke7 , Ka3 13.Kd6 , Ka2 14.Kc5 , Ka3 15.Qa5+ , Kb2 16.Kd4 , Kb1 17.Kc3 , Ba8 18.Qa3 , Bb7 19.Qb2# If someone knows the correct line let me know!
How did you get 2 light square bishops????? I am sure that is confusing for many computers.
i think the best move for black in the second puzzle is queen a6 as if the bishop takes the queen we take their bishop and they cant win anymore because pawn is almost unstoppable
I found the second one! You have to spit yout opponent in the eye, stand up, slap him in the face and then grap his bishops and swallow them. EASY WIN!
► Chapters 00:00 Chess Engines Couldn't Solve This Puzzle 00:43 Stockfish Engine's Incorrect Evaluation 01:48 Black's powerful move for the draw! 03:19 Computer got confused 03:42 Can you solve this puzzle?
@IamnotfromUSA
9 ай бұрын
You force king into place where it is stalemate and he needs to give up hes bishops to avoid it
@IamnotfromUSA
9 ай бұрын
And you give him space aftter you capture the bishop
I saw it immediately. Check and then rxf1 kxf1 and bh3 because the square h8 is black and the bishop is lightquared.
Welcome back 🙏
without looking is it queen to b5 check, king moves (if moves back sacrifice the queen by taking the bishop so he has to take with the pawn so you can push the pawn and create a queen.) wait you can just force the king to go back and create a second queen BOOM.
you do queen knight opposition until king is in corner and has to move bishop
The second one: Maybe bring the king into a kind-of stalemate position so that Bc8 is forced
@offlinecoder2626
Жыл бұрын
But how do u do it? U have no waiting moves, and white will not just comfortably walk to the corner and let u zugzwang them.
@foxware5587
Жыл бұрын
@@offlinecoder2626 It's easy to force a king to the corner with a queen. Just try it.
why should the black tower move to the other end and not just one square left? if white moves king left too, black can still install it's sprinter on d3...
I added a video with the moves for the last puzzle
last puzzle is ez, just take the bishop, it they take, in any way its stalemate so whites king has to move, which then you take the 2nd bishop and congrats, u got a winning position
queen has to sacrifise herself but if queen takes a6 it is a forced draw bishop takes queen if queen takes bishop it is also a draw so queen has to take c6 after bishop takes king can make his escape route and if bishop doesnt takes the queen and makes a king move we take the last pawn with the queen after bishop takes queen we take the other bishop with king and since bishop will have to leave the diaognal king can escape and it will be a 2 pawn vs a bishop
1.Ra1+ Rf1 2.Rxf1+ Kxf1 3.Bh3!! gxh3 and black's king will hide on the queening square at h8. White has the wrong colored bishop, so he can't stop black's king from controlling the queening square, and he can never promote his pawn safely. ½-½ I personally find such an intermediate concept being impossible for top engines hard to believe, but they do have some odd shortcomings, lol.
@AlexanderWeixelbaumer
Жыл бұрын
It's actually pretty easy to explain: When reached the maximum depth of the analysis of a game the engine calculates the material and add/substracts some points for position. Here this is a fatal flaw because the additional material doesn't help to checkmate later. Stockfish 15 NNUE solves the puzzle with ease.
i found a steal mate
King hast to bei where the qween was and than Check mat
on first puzzle why not bd3?
no wonder they couldn't find the solution to the 2nd one how are you gonna have 2 light squared bishops
Whay about bishop to d3 then rook to a1 would that win back
DUDE I SWEAR I SONLVED IT FIRST TRY AND WAS LIKE NOW WAY AND THEN I CHECKED WHAT THE SOLUTiON WAS AND BROOOOOOOO!!!!
Puzzle 3 sacrifice the queen on a3
This was quite easy puzzle and I could get the solution instantly and also my stockfish engine on smartphone solved it instantly as well. So I am not sure what I am missing here.
Hello sir , how can I play with you chess plzz tell me ..,🙏😇😇
@saldownik
Жыл бұрын
Pay 😂
Any Queen move (except leaving it en prix) wins for black.
db3 & ar1
whats the name of the cat?
Chase the King with Queen until it is in the corner then white is forced to move his Bishop. Then give a check to release the white king an take the Bishop
just let me know the solution to the puzzle , if anybody knows it
ez, we need to get white king into the corner to give white only one posible move. It's move the bischop and then our king can expace from the trap and he can start move to chekmate.
@joshpinchuk7061
2 жыл бұрын
Not quite, the queen needs to be able to take the bishop because if the white king is in stalemate and you take Bishop with the black king, then the White King will still be in stalemate after you take back with the black king. Obviously you have to take that bishop once it moves with the black queen
@offlinecoder2626
Жыл бұрын
And how exactly would u do that?
stockfish 14 is able to solve it
just force the white king to move to h file and then to h8 then white has to give up his bishops.
@mryellow4633
2 жыл бұрын
Nice! I'd probably get 50 moves before I do that correctly 😂 edit: stockfish 11 depth 50 says mate in 23
queen takes a6 i guess
Just bring the queen to c8
What is up with second puzzle? Both bishops are on white squares. The only possibility for this is a pawn underpromotion. If promoted why gain a bishop over a queen.
@bigl5343
2 жыл бұрын
Just realized you said "don't ask", lol.
@offlinecoder2626
Жыл бұрын
It is a composed puzzle 🤦♂️
On the first puzzle why not after 3. Bh3, Kf2?
@parshavkala9855
Жыл бұрын
bishop captures g2 and then draw
❤❤
Well I mean if white plays the actual best moves he wins lmaoo
@jlachman381
Жыл бұрын
Go on and tell us what the best moves are!
Йор инглиш ис вери гуд
The cat is better
I solved it
1. ... Qxa6
@mryellow4633
2 жыл бұрын
what's the continuation?? Qxa6 Bxa6, Kxa8 Kf6, Kb8 Ke7, Ka8 Kd7, Kb8 Bb5... black can either go back to a8 or push the a pawn. If go back to a8 then Kxc7, and if black pushes pawn then Ba4 and black is in zugzwang
i got it pretty quick I'm 1800 ish on lichess ,will admit i was not 100% certain but i was aware of the king in the corner trick
I found the moves in 5 seconds
@GMIgorSmirnov
Жыл бұрын
Awesome
@roylaoh949
Жыл бұрын
@@GMIgorSmirnov how to move second puzzle?
@roylaoh949
Жыл бұрын
Yes,, black win👍🙏 💪
Second Puzzle: .... Qxa6 2) Bxa6 Kxa8. Then march the pawn down to the end to promote.
@SpinyBadger
2 жыл бұрын
How? Both pawns will be blocked, the King's trapped, and White can just shuffle his King around. Draw.
@offlinecoder2626
Жыл бұрын
@@SpinyBadger White would win as they would leave their bishop on a6 to walk their king to d7, and then play Bb5 to give the h pawn a move to immediately blockade it by playing Bh4 and then we simply take the pawn and win.
Can't a queen alone always eventually corner a queen thereby forcing the bishop to move and allowing the king to take it? That said pawn advancement or king and king as a team is inevitable. So it is a win for black.
first
How are there 2 white bishops?
@dwayne1474
Жыл бұрын
It's a puzzle my bro
@dwayne1474
Жыл бұрын
Also it is possible through promotion. One could promote a pawn into another white square bishop
Wôw
The Waffle House Has Found Its New Host
what if bishop goes d3 and then rook a1?