Questions tagged [problems]

Chess problems consist of a board position and a task. Most ask for a line of play that mates black in a set amount of moves, or a combination that results in a winning position. Many other types exist, including, but not limited to, construction tasks for various positions and proof games that have numerous goals, selfmates, helpmates, and retrograde analysis. Tournaments and championships exist for composing of original problems and for speed-solving.

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33
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12answers
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What move requires the greatest number of moves before it could be played in a game?

The move e2e4 could be played on move 1. (One half-move) The move e7xd6 could be played no earlier than by black on move 3 (6 half-moves). What move(s) has the latest "earliest possible move it ...
12
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1answer
412 views

If repetition loses, who wins KvK?

Suppose we're playing a version of chess where you lose if you repeat an earlier position (position = arrangement of pieces + who's move it is). We're down to the wire, and we've just arrived at the ...
3
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1answer
61 views

Two seriesmover stalemate constructions

Easy one: Starting position, but Black never moves. White makes n moves (no checking!) until Black is stalemated. Minimize n. Hint: You don't need to capture all Black pieces, pawns can also be ...
3
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1answer
192 views

What is the shortest 1:16 mutual stalemate with the White king at home?

In this ancient r/chess thread, several users explored the shortest possible 1:16 mutual stalemate. StoofBuzze provided a record in 42.5 moves. However, what is the shortest such game in which the ...
18
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2answers
4k views

Is the position in this trick question reachable?

I found this trick question on r/Anarchy chess: White to move, mate in two. [FEN "2R2RK/6PP/5P/3PN/P/1pQ3p/n1p1qbp/5brk w - - 0 1"] [StartFlipped "1"] The trick is that But is ...
3
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1answer
440 views

Quickly losing a queen in style

I accidentally ran into this game again. [FEN ""] [startply "7"] 1. e4 e6 2. d4 Qf6 3. e5 Qf5 4. Bd3 What would be the fastest way to lose a queen by a direct attack on ...
4
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1answer
145 views

What should Black do?

I am reading “Ten Ways To Succeed In The Opening“ by Tim Onions and David Regis. On page 48, there is a problem I am trying to solve. However, I can’t figure out what Black should do next.
8
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5answers
622 views

Is this selfmate solvable or fixable?

This is a kind of a repost of a fascinating chess problem that appeared yesterday. The original poster got shy or something, and bafflingly deleted his own post, which was beginning to attract some ...
6
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1answer
2k views

Forced mate: 2 queens vs king

On the board, there are 2 queens (of the same color) placed on random squares. The opposing side has only a king, placed on a random square (and not in check). There obviously exists a mating sequence....
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6answers
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What is the most complex chess problem?

There are many chess problems and studies that are very nuanced and can take ages to properly figure out. What is the chess puzzle/problem with the longest (proven) solution?
0
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1answer
188 views

I have discovered a selfmate requiring 1,351 moves to enforce. How does this move-count stack up against the 'record holder'?

I've discovered a selfmate requiring 1,351 moves to enforce. What is the highest move-count known for a selfmate? {The starting position is provably legal}.
8
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1answer
174 views

Selfmate problem

[FEN "8/7P/8/p2p4/P2p4/pB1p4/3P4/k2K4 w - - 0 1"] Composed by IM Geir Sune Tallaksen. White moves first, and must force Black to deliver checkmate. Give the sequence of moves that force ...
3
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1answer
143 views

The quickest selfmate in 2

Duh. Clearly, the one shown there with Qxh5+ Rxh5# can be easily turned into a s#2, by e.g. B-e2-f3, Qe2 from White and c6, Q-a5xd2-d1 from Black. 9.0 moves if I added correctly. Someone care to beat ...
10
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1answer
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Is there more than 1 solution?

In this selfmate puzzle is there more than one solution? I think I found one but I was curious to know if there is more than one. 4N2k/5P2/3p1rP1/2pP4/2p1K1R1/2B1P1N1/6Pp/8 w - - 0 0 Credit: J. C. J. ...
17
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3answers
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THE longest problem ever (much longer than the mere 549 mover...)

The "Fireside Book of Chess" by I. Chernev and F. Reinfeld includes the following diagram [fen "3nk3/3NN3/3PP3/3BB3/3PP3/3PP3/3PP3/2RQKR2 w - - 0 1"] Composed by J.N. Babson for ...
3
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0answers
33 views

Add as many potential moves as possible by move

8/8/7K/p7/R3b2k/6rP/4p3/4B1N1 w - - 0 1 This is an age old record by Shinkman: Black is stalemated if having the move, but the White move 1.Bb4 grants 32 moves. (Don't bother trying to top that...) ...
7
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2answers
2k views

Can there be a checkmate with maximum points of material (103) while covering 64 squares?

Is it possible to compose a game where these three conditions are simultaneously satisfied? No White piece is gone but every Black piece except the king is. All the white pawns are promoted to a ...
2
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3answers
362 views

What is the fastest vertical checkmate for both castlings?

I wish to know the fastest possible castling checkmate, both queenside and kingside, that is vertical. See my question about horizontal checkmates.
14
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3answers
534 views

Fastest King vs King endgame

What is the fastest possible game that ends in a King vs King endgame? Please post a game and tell me the number of half-moves you've achieved. By some simple logic, I can prove that this number is ...
1
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0answers
53 views

The quickest mutual selfmate in 1

How long would it take for a game to reach a position wherein either side could selfmate? Pretend you pass by the board at that moment; you wouldn't know who has the move. I found an answer in 13 ...
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2answers
310 views

What is the fastest horizontal checkmate for both castlings?

I wish to know the fastest possible castling checkmate, both queenside and kingside, that is horizontal. See my question about vertical checkmates..
3
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1answer
518 views

What is the maximum number of en passants possible?

Out of curiosity, how many en passants can theoretically be done by both sides, and what is the fastest way to achieve that result?
4
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2answers
173 views

What is the longest possible forced checkmate sequence?

As title says. My question is about legal positions (positions which could be reached in actual games), but if there is a known solution with an illegal position to start the sequence, I'd be ...
12
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1answer
3k views

What is the longest proven forced win (including 50 & 75 move rules)?

What is the longest (currently discovered) number of moves for a forced mate position where players will use both the 50-move draw rule and the 3-fold repetition rule if it will help them avoid losing?...
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2answers
184 views

What checkmating move takes the most moves to set up?

An extension of this question. What checkmating move requires the greatest number of moves to be played in a game? A move is distinguished by: what colour is moving [unlike the previous question] ...
3
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1answer
229 views

What is the shortest sequence of moves to move all of White's pieces up to at least the third rank?

What is the shortest sequence of moves to move all of White's pieces to the third rank or beyond? Assume in this situation that Black is cooperating in trying to achieve this goal, and as such is ...
2
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1answer
455 views

Castling vertically problem

I've once saw a joke chess study about castling vertically. However, I have forgotten who has composed it. I remember that in the positions, all the pawns were locked, but not much else. Does anybody ...
4
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3answers
788 views

An Interesting Idea: Pinned Pieces Stalemate

I had an idea for a type of stalemate: One side is stalemated with 8 pins in a legal position with as many pieces as possible, with all of the stalemating side’s units being “necessary.” ”Necessary” ...
3
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2answers
253 views

What is the chess position with biggest X, where no matter what legal move black/white does, a specific player will be mated at a max X moves later?

There are positions where no matter what legal move black or white does during this sequence of moves, an specific player, will always be mated after X moves (sometimes earlier, but after X moves its ...
18
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3answers
5k views

Is there a double-forced mate position?

A usual forced mate position is where the winning player can play in a way that ensures checkmate, no matter what (legal) moves the opponent makes (unless the game ends due to a non-play reason, i.e. ...
0
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3answers
402 views

What are the quckest helpmates delivered by the rook, knight, bishop, and pawn?

What are the quickest helpmates, which is where both sides help administer checkmate to one side, delivered by the rook, knight, bishop, and pawn? The said piece has to deliver the checkmate on the ...
2
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3answers
212 views

Where to find Tactical Exercises on the Decoy

A decoy tactic is forcing an enemy piece to move to a square that prevents it from guarding an original square. For example, if the black queen is at c7 and the f7 square is being attacked, getting ...
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1answer
337 views

Smallest number of moves needed to mate a lone Black king on e8 with all White pieces [duplicate]

Imagine that all White pieces are in their initial position and Black only has their king on e8. What is the smallest number of moves needed for White to give checkmate?
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2answers
302 views

The slowest Fool's Mate in Chess960

The fastest Fool's Mate in Chess960 is obviously 1. d4 g5 2. Qxg5# with any ..Q.BRKR setup, which even beats standard chess. But which is the starting position with the slowest mate? I checked a few ...
22
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1answer
3k views
2
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1answer
295 views

Longest sequence of forcing moves?

What is the longest fixed consecutive series of moves for one player such that the other player's response is forced every move? Assume draw rules must be obeyed (threefold repetition, 50-move rule, ...
1
vote
2answers
162 views

How many times can the king and its surrounding squares be attacked?

In a legal position, how many times can the king and its surrounding squares be attacked? There is a total of 9 possible squares to be attacked-the square the king is on and the eight squares ...
9
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4answers
2k views

Longest forced sequence that ends with checkmate and every move is a check

What is the longest move sequence that ends with checkmate and every move is a check by both players?
14
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4answers
3k views

Difference between chess puzzle and chess problem in this episode of The Queen's Gambit?

While a chess puzzle is any puzzle involving aspects of chess, a chess problem is an orthodox puzzle in which one must play and win or draw a game, starting with a certain composition of pieces on the ...
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7answers
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Can a stalemate be forced even if it is the opponent's turn to move first?

Here are examples in which the side that desires a stalemate can force a stalemate, provided it is their turn to move. Are there positions where the side which desires a stalemate does not presently ...
1
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1answer
90 views

The fastest dualed mates in n

Hauke Reddmann asked a cool question about the quickest dual-free mates in n's from the starting position. But this is a rather limited scope. I wish to attack this idea from a different angle. What ...
4
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3answers
460 views

Puzzles that highlight the finiteness of the chessboard

I'm curious as to whether there are compositions of chess puzzles/problems where the solution really emphasizes the boundedness of the board. Put differently, cases where the solution would be ...
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1answer
350 views

Why go for stalemate here?

In a Daily Puzzle of the Chess.com app, playing as white the solution to the puzzle was as follows: [Title ""] [SetUp "1"] [FEN "8/p1Q3bk/P2N2p1/5p1p/7P/6q1/8/7K w - - 0 1&...
34
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1answer
3k views

When was it possible for a player's king to be attacked by 3 of the opponent's pieces?

According to the current FIDE Laws of Chess: 3.9.1 The king is said to be 'in check' if it is attacked by one or more of the opponent's pieces, even if such pieces are constrained from moving to ...
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3answers
1k views

Full board with full point mutual zugzwang

I have two questions. 1) Is there a position with all pieces on board such that the side to move loses? 2) Is there a position with all pieces on board such that the side to move is checkmated in 1? ...
18
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1answer
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Can White avoid a loss in this endgame study by Lazar?

This is the position with White to move. This was created by Lazar in 1935 according to Susan Polgar in a Chess Daily News article from 5/27/2008. [FEN "8/3P4/3b4/8/8/1p2k2p/1Pp4P/2K5 w - - 0 1&...
6
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3answers
507 views

The quickest mate in n

Obviously inspired by the analogous selfmate question. (Helpmate would also be possible in principle, but looks a bit silly.) Thus, 1.f3 e5 2.g4 allows Black a #1, and 1.f3 e5 2.h3 a #2. 1.f4 e5 2....
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2answers
842 views

Longest *shortest available* fixed sequence of moves leading to checkmate?

What is the longest fixed sequence of consecutive moves you can find in any legal position that guarantees checkmating the opponent regardless of their responses (whether by forcing particular ...
1
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1answer
65 views

How many unoriginal pawn moves can be made in a single game?

Consider an "unoriginal pawn move" to be a pawn move whose notation matches a move already played in the game. For instance, after 1.e4 e5 2.d4 exd5 3.e5, there is one unoriginal pawn move, ...
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2answers
2k views

How many times can the same pawn move be made in a game?

How many times in a game can "the same pawn move" be made? By "the same pawn move", I mean, a move made by a pawn that would be notated the same way. For instance, after 1.e4 e5 2....

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