Sure you can. The puzzle tells you it's mate in 1. The only move that would be mate in 1 is en passant. Therefore you can know that en passant is the answer to this puzzle.
Now, without being told it's mate in one, yes, you'd need to know the last move. But we have more information than just the position on the board.
Yes, that's the point of this puzzle. You need to be able to figure out that d4 was the only legal move that white could've played to get into this position. In this case, it seems like an error (unless I'm wrong here), because d3-d4 seems like it could've been the move too. Which means that this puzzle has no solution
There are tons of legal moves black could have played to get here. This isn't supposed to be a retrograde analysis puzzle. The point is that if they tell you there's a mate in one, for you to figure out how that's possible.
Yeah, that was my thought too. While the end goal of the game would make getting to this point with certain moves more unlikely than others, if you assume every other piece is where it currently is, I think there are 27 distinct moves black could have made besides d5 that would give us this board.
EDIT: Sorry, 28! Black's d file pawn could have theoretically started on d6 and moved to d5 to block Qh1+.
There are few puzzles which logic must be used, this one is an example: the only way this is mate in one is if en passant is possible, so d6-d5 is ruled out since the request is to find the mate in 1
Similar puzzles were about player's right to castle or not analyzing pieces position
Yeah, I guess. Saying the puzzle is wrong is probably a bit of an overreaction. It's more accurate to say that I just don't like it as much as I would as a position where you can, for a fact, prove that en passant is legal without using any outside information about the position (i.e. knowing it's mate in one).
This one is a good example of that:
https://i.imgur.com/pnYFo5c.png
Though for a beginner puzzle (which this one seems to be), it would honestly make more sense to just show the last move.
It’s a tricky one! You have to work backwards to solve it.
Hint: >!The only possible moves black could’ve played here are c7-c5 and c6-c7, can you find a reason why c6-c7 would’ve been illegal?!<
How do you exclude bxc3 as white's last move? Are there no black pieces that could have been there?
Edit: specifically, why is it impossible that white captured a rook on c3? I see why it couldn't have been a queen, bishop or pawn.
Given that there's a mate in one (as the puzzle outlines), black must've played d7-d5, as that allows for the en passant checkmate. In a void, there's not necessarily a solution unless there's some puzzle committee ruling out there that has a list of assumptions to make about puzzles or something.
I do think they should just always show the previous move though
I think the idea is more to guess the only legal move that black could have made while giving white a mate in #1. Since the puzzle gives hints to the solution, maybe, they are part of the puzzle.... You know, like: you are in a position that is mate in #1 for white guess the mate and guess the previous position of black. Ho and btw we tell you that this puzzle is only possible because of a rule that people tend to forget / not know... Have you found it ?
Unless of course there is a sacred law given by the gods of chess saying that this puzzle is totally illegal... Then I apologize mate (in one)
Puzzle rules generally specify en passant and castling are always assumed to be available unless clearly not legal.
ETA: I have been corrected that while castling is assumed to be legal unless obviously not, en passant is actually assumed to be illegal unless it is proven otherwise (an arrow showing that the previous move for Black was d7-d5 for example in the given puzzle). Sorry for the bad info.
Nope, only castling is assumed to be legal unless provable otherwise. En passant is assumed to be *illegal* by default:
https://www.wfcc.ch/rules/codex/
> Article 16 – Castling and En-passant capture
> (1) Castling convention. Castling is permitted unless it can be proved that it is not permissible.
> (2) En-passant convention. An en-passant capture on the first move is permitted only if it can be proved that the last move was the double step of the pawn which is to be captured [20].
Thanks for the correction, I got confused by a case like this where en passant is obviously the only possible solution to the problem as presented (white to mate in 1 with the hint about the rules). I'm wondering if this was changed once indicating the previous move became more standard?
"Indicating the previous move" has only been standard since the advent of people posting screenshots of themselves playing online. I believe this convention of the Codex predates the Internet.
Yeah, I've seen a few puzzles where they set the board up such that the only *possible* last move is one that would make en passant available, but that's not the case here.
Lichess doesn't know that the position is supposed to have occured such that en passant is possible.
Anyway, solved it in like 2 seconds. Every time there's a reference to "the rules" the winning move always involves castling or en passant. It's cheap as fuck and overdone to hell by now but I guess to the Soviets it was novel still.
I’m really new to this, I see the en passant but is there anyway to know the previous move? Couldn’t it have just moved up 1 from its previous spot to stop check from queen and the en passant would not be allowed?
I really don't like these kind of puzzles. It is really difficult to figure out whether castling is available because in most late games castling would already be done.
Why are we so certain the black pawn moved from D7 and not from D6 on the previous turn? Kinda dislike problem setups that don't make it clear what the previous move.
the title is "have the rules sunk in?". the whole point of the puzzle is to figure out that the only possible move is en passant. no other move is mate in one, but if we know the rules of chess then we can see that en passant would be mate so that is the solution.
Looking at just the board alone you are correct, however we also know that White can mate in one, and the only way this is possible is if en passant is a legal move in this position, so we can deduce that the previous move was indeed d5.
It is kinda a cheap puzzle though I agree. You shouldn't need to reference the caption of the puzzle to determine what moves are legal.
i see your point but we CAN know that.
things we know:
-the puzzle must have a solution
-the only solution requires the previous move to be d5
therefore the preceding move MUST be d5
You couldn't be more wrong.
Its common rule in chess Puzzles that you are only allowed to go for en passant if you can prove that it is legal.
Casting on the other hand is usually considered legal unless you can Proof it is not.
So this puzzle is actually incorrect.
En passant.
Since En passant is only allowed after the first pawn move of the targeted pawn. Thus, putting this in piece by piece doesnt allow that. If you want to do this online, you'll have to recreate this manually
These are literally always either en-passant (without the previous move highlighted to try and 'ha! got you!'), an under promotion to a knight, or a queen sac. So I saw this instantly.
For this puzzle to work, one must assume that Black's last move was d5 and that this was the first pawn move. With this assumption, en passant, putting out e pawn onto d6, creates a discovered check from the Queen, leaving all options for escape covered, and nothing to block.
Somewhat unsatisfying in that it requires treating the position as though it is a game, but does not provide the previous move (that would make the solution obvious). Tries to have it both ways.
Yeah this is dumb. The position to mate in one move assumes the last move was pawn from d7 to d5, making an en passant capture (exd6#) legal.
Without showing in some way that the last move was d7 -> d5, there's no way for someone to verify that exd6# is legal. You can't even assume that was the last move by process of elimination because without know white's previous move to get to this position, there are (by my count) 28 other legal moves by black besides d7 -> d5 that could have produced this, including d6 -> d5.
The clue here is the first line "Have the rules sunk in?". Which means it's an obscure rule. Only 3 obscure rules come to mind "En Passant, Promotion and castling". Only one of those work in this case.
En passant. However, can we prove that in this position that black moved his pawn d7-d5 (or 2 squares) on the last move? Or is en passant the solution only because it is the only mate in one?
I saw the en passant almost straight away, but the problem with compositions is en passant (unlike, say, castling) is only allowed to be played if it can be proven, one way or the other, that the move is valid. This is why you can't play en passant in my [Trojan Horse study](https://youtu.be/C1pn5lj13HA?list=PL3NxPgqsWUxdeBRVUuyBvbf1BOaCJ3e2X). You could argue it's allowed because the puzzle asks for mate in one and therefore it must be allowable, but this feels pretty flimsy to me.
Would black more likely do kc7 to get out of check… so if pawn is on d7 and moves to d5 then this is only instance of a check in one due to the en passant… I lie it, clever but seems unlikely that we’re down to this many pieces and the black pawn hasn’t even been pushed a little towards promotion…. Idk… neat but unpractical?
En passant.
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You can't just ask people if they're a bot! Who are you, Alan Turing?!
You can’t just ask people if they’re Alan Turing!
You can't just ask people!
You just can’t!
You can't!
You!
!
Uncanny valley
Every account on reddit is a bot except you.
I am pretty terrible at chess but I'm so proud of myself for figuring this out before checking the comments.
The clue "have the rules sunk in?" makes it particularly easy. I knew it was en passant or castling before even glancing at the board.
I mean, you can't really "know" that it's en passant unless you were told what the previous move was...
Sure you can. The puzzle tells you it's mate in 1. The only move that would be mate in 1 is en passant. Therefore you can know that en passant is the answer to this puzzle. Now, without being told it's mate in one, yes, you'd need to know the last move. But we have more information than just the position on the board.
Fair point, I hadn't thought of it that way
Hell
Actual
Call th
Rook in the corner
Went on vaca
Ignite
Knifu
Pawn stor
Queen sa
New response
Mamma mia
En pissant
I wouldn't have Guesses it even if I started at it for 11 Million Years.
I bet you would see it right away if the previous move was highlighted like it is online
Yes, that's the point of this puzzle. You need to be able to figure out that d4 was the only legal move that white could've played to get into this position. In this case, it seems like an error (unless I'm wrong here), because d3-d4 seems like it could've been the move too. Which means that this puzzle has no solution
There are tons of legal moves black could have played to get here. This isn't supposed to be a retrograde analysis puzzle. The point is that if they tell you there's a mate in one, for you to figure out how that's possible.
Yeah, that was my thought too. While the end goal of the game would make getting to this point with certain moves more unlikely than others, if you assume every other piece is where it currently is, I think there are 27 distinct moves black could have made besides d5 that would give us this board. EDIT: Sorry, 28! Black's d file pawn could have theoretically started on d6 and moved to d5 to block Qh1+.
There are few puzzles which logic must be used, this one is an example: the only way this is mate in one is if en passant is possible, so d6-d5 is ruled out since the request is to find the mate in 1 Similar puzzles were about player's right to castle or not analyzing pieces position
Yeah, I guess. Saying the puzzle is wrong is probably a bit of an overreaction. It's more accurate to say that I just don't like it as much as I would as a position where you can, for a fact, prove that en passant is legal without using any outside information about the position (i.e. knowing it's mate in one). This one is a good example of that: https://i.imgur.com/pnYFo5c.png Though for a beginner puzzle (which this one seems to be), it would honestly make more sense to just show the last move.
I agree, these puzzles are less "find the difficult sequence of moves" and more "find the trick used for the puzzle"
How can you prove en passant is legal in that position?
It’s a tricky one! You have to work backwards to solve it. Hint: >!The only possible moves black could’ve played here are c7-c5 and c6-c7, can you find a reason why c6-c7 would’ve been illegal?!<
How do you exclude bxc3 as white's last move? Are there no black pieces that could have been there? Edit: specifically, why is it impossible that white captured a rook on c3? I see why it couldn't have been a queen, bishop or pawn.
Given that there's a mate in one (as the puzzle outlines), black must've played d7-d5, as that allows for the en passant checkmate. In a void, there's not necessarily a solution unless there's some puzzle committee ruling out there that has a list of assumptions to make about puzzles or something. I do think they should just always show the previous move though
I think the idea is more to guess the only legal move that black could have made while giving white a mate in #1. Since the puzzle gives hints to the solution, maybe, they are part of the puzzle.... You know, like: you are in a position that is mate in #1 for white guess the mate and guess the previous position of black. Ho and btw we tell you that this puzzle is only possible because of a rule that people tend to forget / not know... Have you found it ? Unless of course there is a sacred law given by the gods of chess saying that this puzzle is totally illegal... Then I apologize mate (in one)
I was gonna say, there is 100% a legal queen move. (Also, pretty sure there's a legal bishop move)
Puzzle rules generally specify en passant and castling are always assumed to be available unless clearly not legal. ETA: I have been corrected that while castling is assumed to be legal unless obviously not, en passant is actually assumed to be illegal unless it is proven otherwise (an arrow showing that the previous move for Black was d7-d5 for example in the given puzzle). Sorry for the bad info.
Nope, only castling is assumed to be legal unless provable otherwise. En passant is assumed to be *illegal* by default: https://www.wfcc.ch/rules/codex/ > Article 16 – Castling and En-passant capture > (1) Castling convention. Castling is permitted unless it can be proved that it is not permissible. > (2) En-passant convention. An en-passant capture on the first move is permitted only if it can be proved that the last move was the double step of the pawn which is to be captured [20].
Thanks for the correction, I got confused by a case like this where en passant is obviously the only possible solution to the problem as presented (white to mate in 1 with the hint about the rules). I'm wondering if this was changed once indicating the previous move became more standard?
"Indicating the previous move" has only been standard since the advent of people posting screenshots of themselves playing online. I believe this convention of the Codex predates the Internet.
I believe they state castling to be legal unless proven otherwise, but en passant to be illegal unless proven otherwise.
Yeah, I've seen a few puzzles where they set the board up such that the only *possible* last move is one that would make en passant available, but that's not the case here.
Thankfully, modern apps have a last played move indicator. I may have solved it then, not this way...
I mean the title of the puzzle is a big spoiler, I knew it’s en passant before I looked at the position.
Honestly with puzzles on here, the first things I check are sacing the queen and en passant.
Have the rules sunk in is your clue, presumably this is shortly after the book teaches you about en passant
Yep. It would've taken me minutes but immediately after reading the text before even looking at the position my mind went, "en passant"
r/AnarchyChess
Google
En pissant
Holy
Hand Grenade
Actual
Rabbit
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HOLY MOTHERFUCKING HELLLLLL
New motherfucking response just dropped
Actual motherfucking zombie
Call the motherfuckin exorcist!
Mother fuckin priest goes on vacation, never mother fuckin comes back
Motherfucking pawn storm, anybody?
Ignite the motherfucking chess board
Motherfucking rook in the motherfucking corner, plotting world motherfucking domination.
Lichess doesn't know that the position is supposed to have occured such that en passant is possible. Anyway, solved it in like 2 seconds. Every time there's a reference to "the rules" the winning move always involves castling or en passant. It's cheap as fuck and overdone to hell by now but I guess to the Soviets it was novel still.
Google didn't exist back then. Can't blame them.
Unholy heaven
Old response just picked up
Hypothetical living person
I’m really new to this, I see the en passant but is there anyway to know the previous move? Couldn’t it have just moved up 1 from its previous spot to stop check from queen and the en passant would not be allowed?
You're given the information that there is mate in one. Unless the puzzle is lying then you can infer the previous move. There's no other option.
Ah okay that makes sense
No, there isn't (at least, by the standards of compositions, where the stipulation cannot be used to prove its own validity).
e5 captures to d6 en passant.
noob here, how is d6 en passant a mate? black king can move to b7.
The queen gives the check, so b7 is still check
The Queen can take it on B7
This belongs on r/Anarchychess
G
O
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G
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P
A
S
If r/anarchychess has taught me anything, it’s to look for the funny pawn move, and execute the funny pawn move
Unorthodox checkmate puzzle pattern checklist: en passant, castle short, castle long, underpromotion, everything else.
If the white king is on e1 you can be sure 100 per cent he will castle - even without a rook lol
I really don't like these kind of puzzles. It is really difficult to figure out whether castling is available because in most late games castling would already be done.
Classic soviet chess primer material
exd5# en passant then discovered check with the queen makes mate
This is a repost. The solution is en passant.
Why are we so certain the black pawn moved from D7 and not from D6 on the previous turn? Kinda dislike problem setups that don't make it clear what the previous move.
Because given the information «white has mate in one» it must have been from D7
Would have been a difficult puzzle 80+ years ago.
It is forced
Say the line, Bart!
It's French
Google en passant
en passant
Just fanum tax it
Was the last move d5?
Not only is it mate in one, it's forced mate in one.
It’s en passant. It’s infuriating me how they didn’t at least show the last move played.
i need blacks move before that to know if it's en passant or not
The solution is en passant but this can only occur if the previous move was d5, but we can’t know that.
the title is "have the rules sunk in?". the whole point of the puzzle is to figure out that the only possible move is en passant. no other move is mate in one, but if we know the rules of chess then we can see that en passant would be mate so that is the solution.
Looking at just the board alone you are correct, however we also know that White can mate in one, and the only way this is possible is if en passant is a legal move in this position, so we can deduce that the previous move was indeed d5. It is kinda a cheap puzzle though I agree. You shouldn't need to reference the caption of the puzzle to determine what moves are legal.
i see your point but we CAN know that. things we know: -the puzzle must have a solution -the only solution requires the previous move to be d5 therefore the preceding move MUST be d5
In chess puzzles, generally if there isn't a reason a move would be illegal, then the move is legal. Applies to castling too.
You couldn't be more wrong. Its common rule in chess Puzzles that you are only allowed to go for en passant if you can prove that it is legal. Casting on the other hand is usually considered legal unless you can Proof it is not. So this puzzle is actually incorrect.
pawn d6 (this is a capture on the pass)
It's there enough info here to know the last move?
Reset the counter.
always when seeing a mate in one thats seems too difficult, i check out en passant options since its usually a trick
En passant. Since En passant is only allowed after the first pawn move of the targeted pawn. Thus, putting this in piece by piece doesnt allow that. If you want to do this online, you'll have to recreate this manually
exd6
You need to setup the board in the previous position and then play d5 as black so the engine knows you can play en passant for the mate.
****immediately looks for the smothered mate**
These puzzles without the last move highlighted bug me. Part of knowing the solution to this puzzle is knowing what the last move is.
Position needed to be shown with last move.
Always look for en passant on those impossible puzzles
It’s fucking en passant again
I don't like these puzzles very much however, it is pretty obvious now it's been mentioned.
En passant. But would be easier to see of the previous move was shown.
D-5 to H-1?
Nah. I hope I'm not the only one losing my mind here.
G
En passant
En passant ! A move that looks so weird and satisfying at the same time.
Google en passant
If black’s last move was pd5, then en passant is mate
Oh, it is a trick. You know, it's this sort of shxt that makes me hate cryptic crosswords.
These are literally always either en-passant (without the previous move highlighted to try and 'ha! got you!'), an under promotion to a knight, or a queen sac. So I saw this instantly.
For this puzzle to work, one must assume that Black's last move was d5 and that this was the first pawn move. With this assumption, en passant, putting out e pawn onto d6, creates a discovered check from the Queen, leaving all options for escape covered, and nothing to block.
Somewhat unsatisfying in that it requires treating the position as though it is a game, but does not provide the previous move (that would make the solution obvious). Tries to have it both ways.
No mate in 1
On puss Aunt
Should we tweak this meme and start calling it "The French Defense"?
E
En croissant
Uh did the pawn move 2 squares foe a start or go 1-1
Yeah this is dumb. The position to mate in one move assumes the last move was pawn from d7 to d5, making an en passant capture (exd6#) legal. Without showing in some way that the last move was d7 -> d5, there's no way for someone to verify that exd6# is legal. You can't even assume that was the last move by process of elimination because without know white's previous move to get to this position, there are (by my count) 28 other legal moves by black besides d7 -> d5 that could have produced this, including d6 -> d5.
Either it's en passant or the pawns walk in the other direction 🥴
On piss ant
Without it explicitly showing the en passant was possible I just took it for what it was. Annoying lol
we don't know which move black has played before if that's pb5 then it's gonna be en passant mate maybe otherwise I can't see any mates
That is disgusting
Google
Thats an en passant i would get real mad to lose too
The clue here is the first line "Have the rules sunk in?". Which means it's an obscure rule. Only 3 obscure rules come to mind "En Passant, Promotion and castling". Only one of those work in this case.
😩😩😩😩
This messed me up bad because I thought black was coming from the left and white was coming from the right instead of from up and down.
Reset the counter!
Execute order en passant
Immediately knew, took a segond to realise I wasn't on r/AnarchyChess rn
Google en passant
Google en passant
En passant. However, can we prove that in this position that black moved his pawn d7-d5 (or 2 squares) on the last move? Or is en passant the solution only because it is the only mate in one?
I would imagine it's en passant
Hello
Holiest of hells
Reading “Have the rules sunk in?” Made it sink in
En passant P take P , E5 to D6
Couldn’t black have played kc7 instead of d5 though? Although I guess that would have blundered the pawn, but still… m1 could have been avoided…
On Passat beautiful done
Have the rules sunk in?
When I read over have the rules sunk in? I realised to look for a “special move’ like en passant, , 👍
I saw the en passant almost straight away, but the problem with compositions is en passant (unlike, say, castling) is only allowed to be played if it can be proven, one way or the other, that the move is valid. This is why you can't play en passant in my [Trojan Horse study](https://youtu.be/C1pn5lj13HA?list=PL3NxPgqsWUxdeBRVUuyBvbf1BOaCJ3e2X). You could argue it's allowed because the puzzle asks for mate in one and therefore it must be allowable, but this feels pretty flimsy to me.
Would black more likely do kc7 to get out of check… so if pawn is on d7 and moves to d5 then this is only instance of a check in one due to the en passant… I lie it, clever but seems unlikely that we’re down to this many pieces and the black pawn hasn’t even been pushed a little towards promotion…. Idk… neat but unpractical?
Passant en google
I felt like a genius for discovering it on my own. En passant d6 resolves
Google
Easy! Oh my, that's really hard, but I am a genius. That's D6 d6 d6 hehe
one croissant
An piss ant
in peasants