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.

Filter by
Sorted by
Tagged with
2
votes
1answer
96 views

Checkmate with only relevant pieces

What is the maximum number of black and white pieces which are relevant in a checkmate position (by White)? That is if any piece (black or white) was removed from the board, the checkmate would not be ...
9
votes
4answers
2k views

Website or program that creates puzzles from blunders in your past games

I'm looking for a website or program that would look at your past games on Lichess or chess.com and find moves that you played that were blunders and create puzzles around those
2
votes
2answers
102 views

Black to move and mate in 3

I found this interesting problem on Reddit. If this position appears in Britz's game of mine, I also would miss this. [FEN "5r1r/ppk3p1/8/2bB4/3n4/7b/PP4PP/RN1QR1K1 b - - 0 1"]
14
votes
2answers
3k views

Can you solve this queen + 3 pawns vs bishop + 3 pawns chess problem?

[FEN "7k/8/8/8/6p1/4QpPb/5PpP/6K1 w - - 0 1"] I found this interesting and unique chess problem online while surfing on the internet. Disclaimer: This is not necessarily a position from a ...
15
votes
2answers
2k views

Can you solve this chess problem of a single pawn against numerous opposing pieces?

[FEN "8/8/8/2p5/1pp5/brpp4/qpprpK1P/1nkbn3 w - - 0 1"] I found this interesting and unique chess problem online. Disclaimer: This is not a plausible position from a game, however it is ...
8
votes
3answers
296 views

What is the most defended structure?

Let's say the opponent has no pieces on the board but you have all of your pieces. In what way should you place your pieces on the board so that you have the absolute maximum of support for each piece?...
8
votes
1answer
2k views

Can you solve this chess problem of a lone knight against numerous opposing pieces?

[FEN "8/1nq5/bppp4/1p1k1K1N/1rrp3b/2pp2p1/8/n7 w - - 0 1"] I found this interesting and unique chess problem online. Disclaimer: This is not necessarily a position from a game. It's just a ...
33
votes
1answer
6k views

Can you solve this unique chess problem of white's two queens vs black's six rooks?

[FEN "3Q4/7Q/3rp3/2rkr3/2rrr3/7K/8/8 w - - 0 1"] I found this interesting and unique chess problem online, on the internet. Disclaimer: This is not necessarily a position from a game. It's ...
2
votes
1answer
155 views

Reasons why castling may be the only winning move

I recall at least one game of mine where my last move was castling (around move 20 or so :-), it saved my ugly posterior, it was the only move and we immediately agreed on a draw after that. (Do not ...
1
vote
1answer
84 views

Chessboard Materials

[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR"] Starting a game with a total of 78 point-value, how many legal moves are required to produce the maximum total point-value on a ...
7
votes
3answers
1k views

Square Free Position

[FEN ""] For the purposes of this question, a “square” is a set of four occupied cells on the chessboard whose centres form a geometric square. The cell may have any orientation. For ...
15
votes
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
votes
1answer
242 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 ...
6
votes
2answers
181 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 ...
17
votes
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. ...
2
votes
3answers
312 views

Why is Ng5 a draw here?

Was shared a chess position and reached this position. I didn't understand why Ng5 is a draw. I analyzed h6 and h5 as responses but they fall to the same checkmating theme of rook checkmate on h8. ...
13
votes
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 ...
12
votes
3answers
680 views

Chess positions that are easy for humans but near impossible or confusing for computers

I noticed that one student is performing exceptionally well and beyond his level during an online class. I was wondering if there are particular chess positions that I can use during class to find out ...
11
votes
3answers
6k views

Why is the queen considered lost?

In this game, white just moved the queen from b7 to c6, and the computer marks this as a "critical blunder" (and suggests that the bishop should take the knight). In this position it ...
3
votes
2answers
179 views

Cyclic attack puzzle

I saw this puzzle and a solution sometime in the previous century, I don't remember where, and I don't remember the solution. Place the 16 white men on an otherwise empty chessboard so that the ...
6
votes
1answer
216 views

A New Year's Math Riddle

Here's a fun and clean riddle for the New Year! I found the material for it on Krabbe's site. I will provide the link when it is solved. How many times can this position be repeated, with both sides ...
4
votes
4answers
350 views

Positions in which only a single long sequence of correct moves avoids forced checkmate sequences

So for n steps, one player can only choose one out of many moves, because all others lead to forced checkmate sequences. Only one path from the root to the leaves of the game tree avoids a certain ...
-1
votes
1answer
77 views

Is there a position where it's possible to claim a draw by both the 50 moves and threefold repetition rules?

It doesn't matter which one the player chooses in that situation, but I'm wondering whether someone can come up with a game where this holds true for at least one move.
2
votes
1answer
50 views

Helpmate in four and a half moves

Merry Christmas everyone! Try this problem out that I made yesterday for SuperProblem.ru. With White to move, solve this helpmate, meaning White and Black work together to checkmate Black, in 4.5 ...
6
votes
1answer
490 views

In this position why shouldn't the knight capture the rook?

The white knight is going to move to e6. However, the computer advises the rook to capture the pawn in b2. Even after the knight moves to e6, forking the queen and the rook, it advises to NOT capture ...
8
votes
1answer
133 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
votes
2answers
72 views

Coordinates probem

[FEN "8/8/8/8/8/4R3/2N2R2/3N1k1K w - - 0 1"] Given that this position could be reached in a legal game of chess, and that no piece was captured on the last move, are we seeing the board ...
4
votes
2answers
175 views

A mate in two problem

[FEN "8/8/4R3/8/2kBn3/K2pQ3/8/8 w - - 0 1"] 1. Re5? With White to move, here is a mate in two problem that I couldn't figure out. My opinion is that the first move is 1. Re5, but Black ...
3
votes
2answers
627 views

Where does the black king stand in this specific position?

[FEN "7r/pppppKpP/6P1/8/8/8/n7/8 w - - 0 1"] Assume that the following position was reached in a legal game of chess. In the last 5 moves, no pawn has moved and no pieces were captured. The ...
6
votes
1answer
429 views

Brainteaser puzzle

So... initial position is [FEN "7k/8/6KB/8/p7/8/Q7/8 w - - 0 1"] Now... Neither white's king nor queen has moved in the previous five moves. In addition, no pieces have been captured by ...
5
votes
2answers
218 views

Is it possible to reach King vs King by moving each piece at most twice?

I'm interested in short games that reach a King vs King endgame. Sam Lloyd reached King vs King after only 17 moves. This has since been improved to 16.5 moves. (See this and that.) One can show that ...
10
votes
1answer
605 views

Find color of the pieces

Given the following position, what colour are the pieces and what was the last move played? [FEN "B1KRN3/PP6/2QK1R2/8/8/8/8/8 w - - 0 1"]
5
votes
1answer
702 views

Do you know this proof game?

I'm not familiar with this proof game. [FEN "r2qk1nr/ppp1pp1p/2n1p2p/8/8/1P6/NPPPPPPP/R3K2R w KQkq - 0 1"] What square was the white queen captured and how?
3
votes
1answer
314 views

Retrograde analysis problem

Given that this position is legal, and could be reached in a legal game of chess, what were the two last half-movess, or one move for White and one for Black? [FEN "5K2/8/6Pk/8/5Q1R/8/8/8 w - - 0 ...
5
votes
1answer
171 views

Can you help me with this serieshelpmate problem?

I found a different kind of problem, a serieshelpmate. I'm trying to get better by thinking outside of the box and solving different types of puzzles. So I found this one but I'm kind of stuck. [FEN &...
2
votes
3answers
220 views

What's the deep idea behind this puzzle?

I'm trying to get better by doing many tactics puzzles a day. This one I found very interesting. The solution is 1. Qxg7+ Rxg7 2. Rf8+ Rg8 3. Rxg8#. I'm trying to figure out what should have jumped ...
10
votes
1answer
2k views

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. ...
1
vote
1answer
121 views

Another good chess problem

[Title "The Chess Monthly, 11/1860, Helpmate In 3 Moves (Version)"] [FEN "6R1/7q/8/5k2/3K1B2/8/8/8 b - - 0 1"] [startflipped ""] Now, in this chess problem by Samuel ...
2
votes
1answer
70 views

Help needed with a problem

On an empty board, how can you place a White king, two White, rooks, and a Black king so that White can give mate in 4 ways from that position?
2
votes
2answers
251 views

The quickest selfmate in 1

How quickly can a legal game reach a position where one side must give checkmate? This is in effect Evergalo's reading (see his (now deleted) answer) of Rewan Demontay's Question 33154; that question ...
0
votes
1answer
139 views

What is the fastest way to reach a position in which one side is forced to choose between checkmate and stalemate?

I had an interesting idea recently. While there are many proof games ending in checkmate or stalemate, why not both, I thought. So, thus I wondered, what is the fastest way to reach a position in ...
8
votes
3answers
2k views

How to solve this puzzle of Martin Gardner?

Martin Gardner mentioned the following "chess" problem in his column, Mathematical Games, for Scientific American (he got it from Smullyan, who learned about it from a high school math ...
3
votes
2answers
118 views

How many moves needed to reach this position?

"Homebase" is where all the surviving pieces are apparently on their starting squares. Here is a very easy new example proof game: can you find the unique shortest game that leads to this ...
9
votes
1answer
855 views

From Mate-in-3 to Mate-in-1

Here is my new problem in 3 steps - the key designates here the piece that moves first in the solution. An other way to reach a mate in one I hope you'll enjoy... [Title "From Mate in 3 to ...
3
votes
1answer
97 views

Fastest way to get both kings to the other side of the board?

Say that both players collaborate to get White's king to the eighth rank and Black's king to the first. What's the shortest sequence of moves that achieves this?
24
votes
5answers
3k views

Another Unusual Mate in One

Here is another mate-in-one of my own i.e. a not quite usual one... [title "Mate in one"] [FEN "3b4/R3P3/2kPR1n1/P1p1n3/4K1p1/2Nr4/5p2/1b6 w KQkq - 0 1"] Imagine, you ...
2
votes
1answer
109 views

Puzzle - Mate in 5 - #001

I've been writing some chess puzzles lately and I thought I would post some of them up here. I'm quite fond of this one so I thought I would share. I traditionally am not a fan of problems that are a &...
7
votes
1answer
371 views

Mate in One the Missing King

The post "A mysterious mate in one" made me think of one of my last problems which is also a Mate-in-One with no black King: [Title "White to move and mate in one"] [FEN &...
4
votes
1answer
34 views

Timeline of key historical changes to FIDE Laws & WFCC Codex?

A well-answered question here: FIDE Laws of Chess pre-2017 asks for locations of historical sets of FIDE Laws. I am asking for something which partially builds on that. Is there a timeline of "...
33
votes
3answers
5k views

A mysterious mate in one

Here's a question that's a little off the usual format, but problem questions like this have been done before and are on topic, so here we go! Question: Can you find the mysterious mate in one? The ...

1
2 3 4 5 6