Questions tagged [chess]

A puzzle related to chess. Questions about chess which aren't puzzles are off-topic and should be asked on Chess Stack Exchange.

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8
votes
2answers
173 views

A knight chased by four knights

This is a follow up to A knight chased by three knights Two players are playing a variant of chess on a 11x11 grid. The first player controls a white knight that starts in the centre square. The ...
10
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3answers
657 views

A knight chased by three knights

Two players are playing a variant of chess on a 8x8 grid. The first player controls a white knight that starts in the top-left corner. The second player controls three black knights that start in the ...
51
votes
2answers
3k 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 ...
3
votes
1answer
118 views

Twice Up On Top

Here is a chess problem I've made that has an illegal position. White moves upward and the d1 moves like a normal pawn. Have fun! FEN: F5brb/4p1p1/3pPpPp/3p3P/7p/5PpP/PP4Pp/3P1K1k w - - 0 1 (I can'...
8
votes
2answers
174 views

Black Cavalry Fork Attack

On this chess optimization puzzle, there are only black knights and white queens. Your aim is that no black knight is threatened and to maximize the total number of queens the knights could capture. ...
3
votes
2answers
137 views

Black War Heroes or Whites Save the Queens?

After Black Cavalry successfully captured White princesses, White empire learns their Black opponent is hungry for more and wants White Twin Queens dead! White will never let such a disaster happen ...
10
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). ...
7
votes
4answers
1k views

What was the last move made in this game?

What was white's last move in the game shown below? Note: This is a screenshot taken from an actual game and all moves made were legal. ETA: The last move played by white was the last move of the ...
4
votes
2answers
127 views

Who shall be the winner?

There are two questions to answer here: Who will win this game of chess? What were the last 96 individual moves (ply) by both sides? The solution is unique. Gyula Breyer The Chess Amateur 1922, ...
4
votes
1answer
153 views

The Switchup-2.0

This question from last year has a complete switchup of all non-pawn pieces on the board with all the pawns on the 4th and 5th ranks, The goal was optimize the amount of moves needed to reach the ...
-10
votes
1answer
102 views

N-1 queen on the chessboard

You are trying to solve the famous N queens problem. You broke one of the queens from your chess pieces collections. Now, you have created the following puzzle: You are given an N*N chessboard. Is ...
17
votes
4answers
792 views

Knights in a Complete Sudoku Board

In a complete Sudoku board, at most how many chess knights would it be possible to place on its cells with a 1 inside, so that each knight can walk in order (1, 2, 3, ..., 9) through cells numbered up ...
27
votes
2answers
1k 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 ...
7
votes
1answer
231 views

Catching up to my foe

I had once made a piece of wonderful art Until then it had been a century's vain of work Spent inside those Russian winter days At last made in the early eighties But a friend of mine had recently ...
4
votes
0answers
265 views

Around The World

It's White to move and checkmate Black in 36 moves. Have fun! Oleg Pervakov and Karen Sumbatian, Shakmaty v SSSR 1990 P.S.-To me, it’s crazy that the title hasn’t been taken yet! Hint:
8
votes
0answers
246 views

An Unusual Amount Of Help

Another day, another helpmate to solve! Given that White moves first and to help Black checkmate White, find the least number of moves needed such that Black mates: -With a queen -With a rook -...
2
votes
1answer
121 views

Footmen And Friends #2: Leapfrog

Seeing as the pilot episode was a major success, with an outstanding and correct response from one of our viewers, it’s time for Episode 2. Remember, we show puzzles with kings and pawns only! Those ...
7
votes
1answer
322 views

The Rambling Monster

The Rambling Rook is back, but this time, they are a true monster! It’s White to move and reach a winning position in 101 moves. Gijs van Breukelen, Schakend Nederland, 1981, Special Honoring ...
8
votes
1answer
231 views

The Slaughterhouse

Here is a problem three Black pieces against the entire White army. I named this puzzle "The Slaughterhouse" for a reason. It's Black to move and selfmate themselves in 17 moves. Naturally, White ...
8
votes
3answers
943 views

Uncommon underpromotion motive

Find 2 chess positions in which the only move is a promotion to a knight, or bishop (1 position for each piece). However the goal of the underpromotion must NOT be one of the following : Preventing ...
6
votes
1answer
300 views

Whites capture whites and Blacks capture blacks

This is my first Chess Puzzle! Let suppose you start a Chess game. Whites' aim will be to place all their alive pieces on white squares in a minimum of moves and black will do the same, but with ...
5
votes
1answer
626 views

100 moves for a rook in a two by two board

A rook is in a corner of a two by two board and wants to get to the opposite corner in 100 moves. In how many ways can the rook perform this? Note: The rook may go through the opposite corner before ...
48
votes
4answers
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 ...
10
votes
2answers
1k views

How many bishops to walk across the board?

N bishops are placed on a standard 8x8 chess board. Each bishop can move normally but after touching or moving over an square, that square is considered marked. A bishop cannot pass over or land on ...
7
votes
2answers
467 views

The Russian machine has a flaw

The year is 1969. You, Robert James Fischer, are invited in a secret Russian basement to 'play a chess game against a strong opponent'. When you finally meet your opponent, a Russian bald guy who is ...
4
votes
2answers
346 views

An Antichess Puzzle

There's a fairly popular alternate version of chess called Antichess, or Losing Chess, or about seventeen other names. In this variation, the pieces move as usual, but the rules are slightly altered. ...
5
votes
3answers
807 views

What is my lover's name?

I have a lover, I love her so She has a special name as we all do But I wish, from me to you, not to tell A secret kept is a secret kept well But if you truly want to know I shall soon reveal her ...
3
votes
2answers
265 views

Judge this position

An odd chess crime has occurred. The below position, a criminal one, was on the board when it was intercepted. Is it a legal or illegal chess position? Give reasonable proof as to why. You are to ...
3
votes
1answer
220 views

That Ain’t Right… #3

Here’s a simple challenge. With black to cooperate and move first, and white to checkmate, checkmate black in 6 plies (half-moves.) Only one illegal move may be made, and white makes only legal moves....
9
votes
3answers
317 views

Where art thou, oh native rooks?

Here’s a tough puzzle for you all today! Given that both White and Black conspired to reach this position as briskly as possible, where standth White’s native rooks (the one from the starting ...
7
votes
3answers
175 views

Placing The Black King

In this position, White’s sole aim is to castle. But in order to do so, they must promote their pawn to a queen to force a Black bishop move. The 10 black kings represent where Black’s king can safely ...
12
votes
4answers
541 views

What’s the most possible checkmates in one, but with no promoted pieces, in a position?

What is the most possible checkmates in one without promoted units in a position? It must all be legal, of course. Promotions are allowed in the game, but the position is not allowed to start with ...
18
votes
3answers
883 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 ...
7
votes
1answer
146 views

What is the minimum-value piece combination necessary to checkmate in this game of Crazyhouse?

Imagine you're playing a game of crazyhouse, which operates like standard chess, except that you have a pocket of captured pieces that you can drop on the board in any legal location as your move. ...
4
votes
1answer
101 views

Maximum number of legal moves after n moves in a chess game [closed]

Given the chess start position : What is the maximum number of legal moves white can play after $n$ full moves? We will assume black is helping white in this task. I want the best answer you could ...
12
votes
3answers
185 views

The Chess Moments

The chessboard was well balanced on the mid horizontal by some fulcrum. Black and white pieces were carefully placed on such board for equilibrium. Because the wooden pieces weights vary, their ...
7
votes
2answers
528 views

Knights and Queen puzzle

This is not original. I just want to share this problem. If you have heard of it, please give opportunities for those who haven't to answer. Horst and Queenie are playing a game on a $200\times200$ ...
14
votes
3answers
725 views

Forced selfmate in n-moves

I assume most people on PSE know a bit of chess With white to move, this is checkmate (1. Qb7#): That's boring. Let's try something more interesting. With black to move, black can FORCE white to ...
1
vote
1answer
65 views

k-threats Chinese Cannons Chess: Part 2

Inspired from the N-Queens problem, I here propose you a puzzle from Xiangqi wich is Chinese Chess equivalent, mostly played in Asia. The most different piece from Xiangqi is the cannon. You can ...
4
votes
3answers
212 views

4-coloured queens attacking every opponent queen once

Can you place 6 queens from four different colours (24 in total), such that each queen attacks exactly one queen of each colour? They may attack as many queens of their own colour as these are ignored....
4
votes
1answer
74 views

k-threats Chinese Cannons Chess: Part 1

Inspired from the N-Queens problem, I here propose you a puzzle from Xiangqi wich is Chinese Chess equivalent, mostly played in Asia. The most different piece from Xiangqi is the cannon. You can ...
7
votes
4answers
320 views

3 Colors of Chess Pieces Attacking Each Other Once Each

Yes, it's another "Chess Pieces Attacking Each Other" puzzle. This time we have 3 colors. Your goal is to place as many of the same type of chess piece (excluding pawns since you can't define the "...
6
votes
1answer
92 views

Freedom of many choices

There are 40 possible move options for both White and Black players in the starting position. The 4 knights and 16 pawns all have 2 options. If all the pieces are still on the chessboard, how would ...
6
votes
1answer
127 views

Most moves by Most number of Pieces

Using one color, White or Black, place as many chess pieces (kings, queens, bishops, knights, rooks, and pawns, or combinations thereof) as you can on a checkerboard so that when the number of pieces ...
2
votes
1answer
94 views

Footmen And Friends #3: Eviction

Welcome to Episode 3, where we have a strange puzzle for today. Pawns aren't legally allowed on the first and eighth ranks, but today we make an exception for the sake of creating another long but fun ...
13
votes
1answer
820 views

The Single Digit - a chess riddle

In front of you lies a safe. Within the safe, you are aware, lie the AI-discovered secrets to solving the game of chess - indeed, every one of its complexities, all of its unknowns, implausibly ...
6
votes
1answer
880 views

And another one bites the dust

I recently found an extraordinary moremover online today. Have fun finding the solution! It’s White to move and mate in 19 moves! Bonus: Explain the title in relation to the solution! Jozef Lozek, ...
5
votes
1answer
167 views

Footmen And Friends #1: A Long Ways Away

Tonight premiers the first show of Footmen And Friends, a show dedicated exclusively to kings and pawns. Let's give these soul-men of chess a chance to shine instead of their big sisters and brothers! ...
7
votes
4answers
349 views

Chess pieces attacking exactly N chess pieces

In the spirit of completion and the style of: Discrete Peaceful Encampments: 9 queens on a chessboard Queens attacking exactly one queen Queens attacking exactly four queens Knights attacking exactly ...
8
votes
2answers
330 views

The peasant atop the world

Mate in four, White is in glee But all is not as you see For it takes a certain trick A broken rule to break you must pick Tell me the one rule and the grand solution And points you shall earn ...

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