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Questions tagged [chess]

A puzzle related to the game of chess. Questions about chess which aren't puzzles are off-topic but can be asked on Chess Stack Exchange.

5
votes
3answers
402 views

Chess Themed cryptic clues

In honour of the fortnightly topic challenge, here are some cryptic clues that refer to chess: Chewed after leg. It's risky (6) Ace a piece (6) Show where Arthur lived (6) Hint:
18
votes
3answers
1k views

Questions about grandpa (with chess puzzle clue)

Here are two questions about my grandpa Herb, along with parts of the answers. Can you complete the answers to both questions? Q: Who was grandpa Herb's favorite president? A: he gOeS By ... ...
14
votes
1answer
1k views

Replace a piece to checkmate

Nina, playing white in the diagram above, stared down at the board. Two black pawns were close to promotion, and Nina's position was utterly hopeless. "If only I could replace that piece," Nina said, ...
16
votes
2answers
744 views

Are you more clever than Alice?

Once upon a time, Bob was telling Alice about a chess match: "One turn before the end only 4 pieces were on the board, and White could guarantee checkmate for themselves in several ways". Once Alice ...
22
votes
2answers
2k views

A Chess Puzzle With a Twist

You enter a chess club and see pieces arranged on a board like this: Someone tells you that 2 players were playing a game (according to standard chess rules). At the end white announced a mate in 4, ...
17
votes
4answers
1k views

Copycat Chess (Part 3/3)

After finishing the mating move in the second game, Li Chai looked at the mandarin and asked: What do you say now? Kao Tse answered: It's not much of an achievement if you take my mating piece. ...
16
votes
2answers
978 views

Copycat Chess (Part 2/3)

The mandarin stared bewildered on the chess board after Li Chai finished his winning move: But it didn't last for long. He grabbed his queen and repeated Li Chais last move while announcing: What ...
18
votes
1answer
1k views

Copycat Chess (Part 1/3)

This puzzle series is based on a chess story from the year 1934. It is also the first entry for the new fortnightly topic challenge. Li Chai was known as the best chess player in all villages in the ...
12
votes
2answers
651 views

Highest number of mates

In chess, what position has the highest number of checkmates in 1 move for a given side? You can have as many of each piece as you want, except for the king (you get exactly one). Bishops can be same ...
2
votes
1answer
275 views

Crippled King Crossing a Canyon - Up and Down

Please don't flag me. I am not a duplicate of Crippled King Crossing a Canyon. What are the chances now, if the crippled king only can't walk up and down? The rest of the rules are the same as ...
3
votes
1answer
441 views

Black and white queens on an 8x8 chessboard

What is the largest number of queens that can be placed on a regular $8\times8$ chessboard, if the following rules are met: A queen can be either black or white, and there can be unequal numbers ...
4
votes
1answer
146 views

2 Knight Checkmate [closed]

Is it possible to have a two knights + king vs king checkmate if the king is very smart? I know that if the king goes to the corner, it is possible to checkmate, but is it possible to checkmate in any ...
6
votes
1answer
244 views

Checkmate with Pawn and King

Is it possible to checkmate an opponent with a king and a pawn without the pawn promoting to a queen or rook? I've heard that it is possible, but I don't know what the strategy is.
41
votes
1answer
3k views

Crippled King Crossing a Canyon

A chess king has been injured in battle against an evil wizard, and can no longer move northeast or southwest. This king is on the North rim of a canyon, and must flee to safety on the South rim. ...
9
votes
2answers
216 views

The match between the seventh and the eighth player

12 players took part in a chess tournament and any two of them played exactly one match against each other (1 point for victory, 1/2 point for draw, 0 point for loss). After the tournament the top-...
25
votes
2answers
2k views

Rooks on a 15x15 chessboard

On a 15x15 chessboard there are 15 rooks that do not attack each other (via ordinary rook moves). Then each of the rooks makes one move like that of a knight. Is it possible that after all this is ...
19
votes
1answer
910 views

The Black Prowler (chess)

The Prowler is a powerful piece in an alternative version of chess. In the standard board depicted below, we have an initial setup of white pieces and just one black prowler. The special rules are ...
25
votes
1answer
2k views

Trapping The Knight

A knight is placed on an infinitely large chess board with no edges. It can only visit each square once. What is the smallest number of moves it can make that would cause it to become trapped?
6
votes
2answers
503 views

Create an impossible knight transformation

Some examples: Desegregate the Knights and Switch The Knights You must give two 8x8 chess board positions that have any number of black and white knights. Both boards must have the same number of ...
20
votes
2answers
1k views

Desegregate the Knights

You are given a 3 by 3 chessboard with a knight on each corner, where the knights in the top row are black and in the bottom row are white. On each turn, you may move a knight of either color (the ...
29
votes
5answers
3k views

Switch The Knights

On a small $ 4 \times 3$ chessboard, the top row is filled with black knights and the bottom row with white knights. On each move, you may move one knight (as it moves in chess) to an unoccupied ...
9
votes
2answers
484 views

Trapping pieces on an infinite chessboard

Alice and Bob are playing an unusual game of chess. We begin with a piece on a square of an infinite chessboard. On each of her turns, Alice moves the piece. On each of his turns, Bob destroys a ...
3
votes
1answer
122 views

Pawn-free squares

The chessboard below contains two pawns. How many squares (of any size) does not contain a pawn?
14
votes
1answer
982 views

A chic party puzzler

(Based on this puzzle by Gamow. The answer there might give you a hint (so don't look yet!)) At a fancy party in Café la Tour, everybody is friends with exactly 14 of the other people present. ...
7
votes
1answer
586 views

Queens on a Board with Two Players

Alice and Bob decide to play a game. Alice goes first. They will take turns placing queens on a chessboard such that the queen is not threatened by any other queen on the board. Both players play ...
12
votes
3answers
2k views

The knight's game

Alice and Bob play the following game on a standard $8\times8$ chessboard. In the very beginning, Alice picks a square on the chessboard and places a knight on this square. Then Bob and Alice ...
16
votes
2answers
1k views

Shortest forced mate if black has no pieces

Assume that black starts with just the king on e8 and white has all her pieces in the normal opening positions. What is the shortest forced mate for white?
6
votes
1answer
631 views

3D Chess Cube - Queen Puzzle

The basis of this puzzle, is based on a common 2D chess puzzle, where you try to fit 8 queens on a chessboard without the queens being able to attack each other. Extend this concept into a 3D cube (...
10
votes
1answer
1k views

Fastest Checkmates

I'm not very good at all at chess, but was thinking about some interesting chess variations and thought of this question. It is well known that the fastest (i.e. fewest moves required) checkmate is ...
34
votes
1answer
2k views

Can you stop the rambling rook?

This is a chess puzzle someone showed me a long time ago. If you already know this puzzle please give the others a chance to solve it first. Above you see a position where white is obviously on the ...
10
votes
3answers
1k views

Chess Game of Life

A bishop and a rook, of opposing colors, start on opposite corners on the same side of a chessboard, oriented as in the following picture: They then proceed to play a game of cat-and-mouse. Rules ...
21
votes
1answer
752 views

The Knight of Words

You need to turn the following 6x6 square into a word square (i.e. so that the 1st row and 1st column both contain the same six-letter word, as do the 2nd row and 2nd column, etc.) by swapping each ...
15
votes
1answer
653 views

A Game of ChessTron

The rules of ChessTron are as follows. Alice picks a chess piece (not the queen, as it is considered too powerful), and places it in the corner of a standard 8x8 chessboard. Bob picks a chess piece (...
9
votes
5answers
1k views

Knight on the keyboard

You are given a QWERTY keyboard, and are allowed to choose where you wish to start. You are only able type in the same way a knight is able to move on a chessboard (but in this case, on the keyboard). ...
25
votes
4answers
2k views

Black wants to go first!

Billy and Matthew decide to play a game of Chess. They live far away, so they decide to do it online. Matthew wants to play first, but the game randomly gave him the color black (who goes second.) ...
5
votes
1answer
701 views

Find the secret phrase in this encrypted image (Part 4)

Welcome to the final stage of Quark's encrypted image puzzle series. I don't really like reusing old tricks so this puzzle will NOT require steganography tricks. There's not much else I can do to a ....
3
votes
3answers
432 views

Two knights jousting on a chessboard

Two knights (black and white, the latter going first) start on opposing corners of a chessboard, moving across it in the usual manner, attempting to capture each other: the knight who first lands on ...
5
votes
1answer
680 views

2 bishops versus a lone king

There are 4 pieces on the board, the white and black kings, as well as 2 white bishops (on differently colored squares). The only way a stalemate occurs is if the black king is not in check, but ...
5
votes
2answers
245 views

Brave Knight's Journey in N Dimensions

Queen Shayra does not have the most impressive following, but she intends to expand her influence. If she could settle down at the center of an N Dimensional 3-Cube and build a palace there, she would ...
7
votes
2answers
672 views

Solitaire Chess- Round 2

This is another Solitaire Chess puzzle like this earlier puzzle. Rules: Pieces move as in regular chess Every move must be a capture When there is only 1 piece left, you win.
15
votes
9answers
4k views

Solitaire Chess

A friend of mine got me Solitaire Chess for Christmas years ago. I set up the board below. Is it possible to solve it? If so, what is the solution? (No programs allowed- Use only your brain.) Rules: ...
10
votes
2answers
723 views

Musings at a chess tournament

Professor Halfbrain has spent his entire weekend watching the games at the local chess tournament. As usual, every two players played exactly one game against each other. A win yields 1 point, a draw ...
-3
votes
1answer
2k views

Placing n Queens on n x n board

This problem is known as n queens puzzle: How can we distribute n queens on a chess grid of n $\times$ n so that no queen can threaten another. Many solutions are possible for n > 4. To answer this ...
5
votes
1answer
407 views

From Kings to Knights

In From knights to kings and From Knights to Kings on a rectangle we tried to help knights be next to their friends after they were promoted to kings. What happens if we have kings who are deposed and ...
11
votes
1answer
1k views

Two rooks for Bobby Fischer

Bobby Fischer liked to play the following game on a standard $8\times8$ chessboard: In his first step, Bobby placed a white rook and a black rook somewhere on the chessboard (on two different ...
8
votes
3answers
3k views

Queen chasing a knight (chess pieces)

There is a player who controls only a queen, while his opponent controls a knight. Both pieces start from opposite corners of the board. The aim is to kill the knight, without having your queen killed....
16
votes
2answers
2k views

Houdini versus the chess masters

As we all know, Houdini is very good at coming out on top against improbable odds! And oh boy are the odds improbable. For his next great performance, he claims he can play simultaneous chess games ...
16
votes
2answers
1k views

The Erasmus rook tour

Professor Erasmus has found a special way of moving a rook across a standard $8\times8$ chessboard that he modestly calls the "Professor-Erasmus-rook-tour". The professor claims that in this tour, ...
11
votes
2answers
1k views

Filling chess pieces in smallest area

You have 2 bishops, 2 rooks and 2 knights (of no colour). Place them in as small a rectangle as possible such that each piece can be captured by atleast 2 other pieces in a single move. Bishops have ...
21
votes
2answers
2k views

Rook game on chessboard

A rook stands in the lower left corner of an $m\times n$ chessboard. Alice and Bob alternately move the rook (horizontally or vertically, through any number of squares). As the rook moves, it leaves a ...