# 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.

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### Rook Game on a Chessboard - Take 2

This question is inspired by this puzzle. You have an $m \times n$ chessboard with $m \le n$. Alice and Bob alternately move the rook (horizontally or vertically, through any number of squares). As ...
365 views

### The King's Routes Problem: How many possibilities? [closed]

On a chessboard, a king is to be allowed to move one square at a time: horizontally to the right, vertically downward, or diagonally to the right and downward. Imagine a reduced 4x4 chessboard, with ...
159 views

### How many positions can the queen control? [closed]

Given the size of board (n) and the position of the queen (r,c) how can we calculate the total number of squares which can be controlled by the queen?
412 views

### Two knights and two rooks on a 5-by-5 chessboard

In how many different ways can two knights and two rooks be placed on a $5\times5$ chessboard, so that no piece attacks another piece?
435 views

### Chess : flawless victory

-warning : true story alert- In my high school years, I used to be in the chess club. One day, my friend taught me the famous 4 move win and told me how it was "the best, the fastest, most awesome ...
1k views

### Four free rooks for checkmate

You are given a chessboard with a black king at d5, and four white rooks in your hand. You may place the rooks onto the board one at a time, always checking the king. After each rook placed, the king ...
518 views

### Seven Impatient Knights

Source On a $3\times3$ chess board, you must place seven knights according to the following rules: Immediately after placement, the knight must move to an unoccupied spot using a standard knight's ...
453 views

### Chess position such that with perfect play, mirrors itself

I was wondering if it's possible to have a chess position in which the (or at least ONE OF THE) OPTIMAL strategy/strategies causes the pieces in the board to mirror in some way, or to rotate with ...
276 views

### A Stranger (Chess Sliding Puzzle)

A suspicious stranger lurks in the village. Deal with him before escorting the King to the luxurious safety of h8. White is first to move. Only legal chess moves are allowed. Pawns are not promoted ...
365 views

### Pool of Pawns (Chess Sliding Puzzle)

The King has tired of watching the Queen swim in the Pool of Pawns. Help him return to his palace on h8 using as few moves as possible. Only legal chess moves are allowed. Pawns are not promoted on ...
903 views

### Rook River (Chess Sliding Puzzle)

The absent-minded king has gotten himself lost. Help him return to his palace on h8 using as few moves as possible. Only legal chess moves are allowed. Pawns are not promoted on the final rank. You ...
259 views

### Can the rook pass every square just once?

I had a math teacher in high school who gave us a puzzle to solve. We had to draw a chessboard with one piece that could only move in straight paths. Diagonal movement was forbidden. The goal was to ...
276 views

### FootChess 2: The Footening

A friend came to me with the following FootChess position, claiming that White had a way of forcing a win. I'll admit that I regarded the board with skepticism, but as time passed it began to seem ...
5k views

### Chess : The Lone King

An arbiter is trying to figure out what happened on the above adjorned game. He only knew that black made 15 moves and there can be more than one line of moves for this. Can you replay at least one ...
2k views

### A 16 Clue Sudoku Puzzle (but the kings can't be in check)

An entry in the 19th fortnightly challenge... Above is a 9x9 "chess" board with some pieces already laid out, your goal is to fill the board completely, following standard Sudoku rules (i.e. every ...
217 views

### Footchess: Aborted Corner

The ninetieth minute ticks off and we're into extra time. Black sets up for a corner to send the game to penalties, when White realizes that corners aren't actually a thing in this game and makes a ...
1k views

### Rubik's Chess Puzzle

This puzzle is part of the Fortnightly Topic Challenge - "Unconventional Tag Fusion". Last week I found out that Puzzle Prime Co. have invented new type of puzzle - Rubik's Chess. The goal is simple -...
1k views

### Introducing: FootChess!

Imagine if your chess pieces got bored of their little war games, and decided to play something a bit different. The rules are like Chess except as follows: There is a Ball piece that starts in ...
1k views

### Yet Another Simple Chess Rebus

This is an entry to the 19th Fortnightly Topic Challenge Here is a relatively simple chess rebus: Hope it will be answered soon. If not, will add hints. :) To Make it not too broad and take you ...
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### A Simple Chess Rebus

This is an entry to the 19th Fortnightly Topic Challenge Here is a relatively simple chess rebus: Hint 1: Hint 2: Hint 3:
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### From Russia With Love

MI6 has discovered a recently activated Soviet Sleeper Cell operating in London, they've given the task to you to determine where, when, and how they will strike. You come across the location of ...
983 views

### Checkmate all the kings #1

The purpose of this puzzle is to find the minimum number of moves to checkmate all the kings. RULES You are playing as White and you can make as many moves as you want before Black's turn....
334 views

### Cover an unusual board with minimum chess rooks

This is an entry for the 17th Fortnightly Challenge. On this unusual board, how many chess rooks minimum needed to attack all tiles, but they are not attacking each other ? Show us the formation. ...
486 views

### Help Black slide the blocks to solve this chess problem

Here's a chess problem which plays very like a sliding-block puzzle, hence the rather unusual tag combo. Ljubomir Ugren 2nd Prize, Mat, 1976; John Nunn, Solving in Style, no. 183 sh#19 To explain ...
2k views

### Chess puzzle in which guarded pieces may not move

Here's an interesting twist on the theme of chess puzzles, originally from the book Caissa's Fairy Tales by T. R. Dawson. What is the minimum number of moves White needs to win this game from the ...
829 views

### The Swedish king and the chessboard

The following puzzle is an old classic, due originally to the great puzzler Sam Loyd, who published the first three parts in 1859; the fourth and fifth parts are variations due to Brian Stewart and ...
414 views

### 8-queen puzzle on its head

You have 64 chess queens which come in 8 colors, with 8 queens per color. The goal is fill a chessboard with these queens so that any two queens of the same color cannot attack each other, even when ...
487 views

White to play (Regular moves apply except for Black King) Black King or Shadow King can move to "any" square that is not attacked by white pieces. It can not capture its opponent. When not in check ...
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### Monte Carlo Chess

This is an entry to the 17th fortnightly topic challenge. Chess is an interesting game, but is so unrealistic. In real life, you couldn't tell order your knight to attack an enemy bishop and expect ...
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### Closed knight tour on 7x7 board

This is an entry for the 17th Fortnightly Challenge. A knight's tour is a sequence of moves of a knight on a chessboard such that the knight visits every square only once. If the knight ends on a ...
904 views

### On 8x8 board, a knight is on the second square of the last row. Only moving upwards, how many routes to the top?

In chess, a knight moves in L-shaped jumps consisting of two square along a row or column plus one square at a right angle. It can only move upwards. How many routes can it take to any square on the ...
432 views

### Uncle Jimothy and the Kriegspiel match

Timothy and Kimothy were playing a rather intense game of Kriegspiel the other day. For those of you who don't know... Kriegspiel is a version of chess in which the players are not allowed to see ...
601 views

### The Toroidal Chessboard!

Inspired by this awesome question, and this old-but-gold question: What is the minimum number of Chess pieces to dominate(attack all squares) a 8x8 chessboard in shape of a toroid. image courtesy: ...
1k views

### Conway's Game of Knights

You have 1 chess piece: The Knight The board: Conway's Game of Life Your goal: Survive Basically, you control a standard chess Knight. You are only allowed to move to cells considered "live" (...
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### The Knight and the Maze

Shown below is a grid of blue and yellow squares with a knight in the upper left hand corner and green square in the lower right hand corner. Your task is to guide the knight from its starting ...
2k views

### Knights on a Torus

An 8×8 chessboard is in the shape of a torus. (This means that the board "wraps around" - you can go left from a2 and come out on h2, for instance. It also works vertically - you can go up from f8 and ...
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### Queen & “paralyzed” King vs King

In this puzzle the standard chess rules apply on standard 8x8 board, white has King & Queen and black has his King, the only exception to normal rules is that white is not allowed to move his king....
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### Can white's rook and knight without moving white king force stalemate?

This is a recreational chess puzzle question. I'm interested in knowing if white's rook and a knight, can force black lone king to stalemate, without ever using in any way the white king. For simplify ...
280 views

### The kids moved when we were gone! What is the likelihood that white is winning?

Two friends were playing a friendly game of chess. The both have young children who they recently taught the rules and they agreed both children could help if they wished. In the position below (...
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### Kill That Irritating Fly!

There is a long-lived fly fluttering somewhere out there. Some say this fly is able to perform additions and substractions. Quite an amazing diptera, right? Well, there are 7 friends who would ...
1k views

### Detectives vs Nelson: The Chessboard Serial Killer

This is about Nelson, a serial killer who, after each murder, leaves a chess diagram in the scene of the crime. These chessboards give the detectives the opportunity to decipher where, how and when ...
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### Who stole the sorcerer's stone?

In a world of magicians, the sorcerer's stone was stolen. The investigating team conducted some searches, but couldn't find it. They came to the conclusion that one of the teachers of the "Magic Chess ...
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### Chess Fortnight is finally over!

(Note: the backstory here may or may not be entirely fictitious.) The fortnightly chess theme is finally over! I couldn't stand it. It was chaos! Pieces moving around in all the wrong ways... I was ...
1k views

### A Puzzle That Marches Swiftly To The Median

James Bond enters M's office. ...
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### Chess with bouncing and explosion

Consider chess with the following additional rules: The edges of the board consist of ranks 1 and 8 and columns a and h. Bouncing: When a piece goes from a non-edge square to an edge square, it ...
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### An Easy Mate In 1

As stated in the title, white must mate black in 1 move. But first you must solve the mystery behind this puzzle. This puzzle was created by Hieronymus Fischer (1843-1927).
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### Eight queens on the chessboard with mirrors

A 8-by-8 chessboard has two mirrors added on its left and right margin. The mirrors reflect the queen moves so that a queen threatens additional squares on the board. A queen threatens all squares in ...
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### 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: