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Questions tagged [chess]

A puzzle related to chess, a two-player board game with white and black pieces of varying ranks.

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13 votes
2 answers
395 views

Can White still castle?

Here is my third retrograde puzzle - I hope you guys will enjoy it :) For this construction, I took some inspiration from shoopi's excellent puzzle series from a while back. It should also be a bit ...
Tim Seifert's user avatar
11 votes
2 answers
541 views

What was White's last move?

Another retrograde chess puzzle! Unless I overlooked some shortcut, this should be a bit more tricky than my last one: In the position below, what was White's final move? In your answer, please ...
Tim Seifert's user avatar
24 votes
2 answers
3k views

How did White lose all their pieces?

Recently, I have been dabbling in composing a few retrograde chess puzzles. This one, I feel, turned out quite nice: In the game leading to the position below, White somehow lost both their rooks and ...
Tim Seifert's user avatar
6 votes
1 answer
398 views

The Last Chess Game

Mr. Squares left you his property. You discover a mysterious chest locked with a seven-letter combination lock. On the chest, an engraved checkerboard with a game's worth of chess moves: Game ...
Vepir's user avatar
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13 votes
5 answers
2k views

General attacking chessboard squares

This is a general version of this beautiful puzzle. Place any number of standard chess pieces on a 8x8 chessboard, such that there is at least 1 empty square attacked by exactly 1 piece, at least 1 ...
Dmitry Kamenetsky's user avatar
12 votes
1 answer
510 views

Attacking chessboard squares with 6 pieces

Place 6 white pieces (a king, a queen, a rook, a bishop, a knight and a pawn) on 6 different squares of a regular 8x8 chessboard so that there is at least one empty square attacked by exactly one ...
Will Octagon Gibson's user avatar
26 votes
6 answers
4k views

Find a chess position that can occur twice but not thrice in a single game

For purposes of this puzzle, a chess position consists of an arrangement of pieces on the board, as well as the side to move. No other information about the game state is included. The objective of ...
Elliot Glazer's user avatar
6 votes
0 answers
249 views

Mate-in-25 tsumeshogi

This is apparently the first shogi-related question on this site! Yay! Anyway, this is a mate-in-25 tsumeshogi. Sente (the player with the pieces pointing up) is to move and by an uninterrupted series ...
Parcly Taxel's user avatar
  • 7,720
0 votes
1 answer
386 views

Rooks covering Dark Squares on a Chessboard

How many rooks are required such that all dark squares on the chessboard are covered by at least one rook.
Sny's user avatar
  • 3,225
5 votes
1 answer
872 views

How to beat level 24 in Chessformer?

This is Level 24 in Chessformer: This is pretty easy to do at first, as long as you don't click the restart button (which I did by complete accident when I had some good progress on this level): ...
CrSb0001's user avatar
  • 2,307
5 votes
1 answer
241 views

Decent Knights - Chess

In Naughty knights it’s asked to prove that it’s impossible to fit more than 32 knights such that no knight attacking other. Can you find the minimum number of knights, filling the table in a way that ...
ulutku's user avatar
  • 151
4 votes
3 answers
266 views

What is the longest single-branch chess sequence?

A chess position's n-score is defined as: NaN if it's impossible for the position to be played for another n half-moves (assume that the game ends in a draw as soon as the same position is repeated 3 ...
fblundun's user avatar
  • 1,536
0 votes
1 answer
124 views

Chess with gravity #2: Keys, Locks, and Lava

Previous Puzzle If you're having trouble understanding the key/lock thing, watch this until 9:30 which might be a better explanation of what I'm trying to say General Rules: In this puzzle, you ...
CrSb0001's user avatar
  • 2,307
1 vote
2 answers
2k views

Chess, but with gravity? #1

Based off of this puzzle and this Youtube video Rules: You control the pieces labeled kn (knight), b (bishop), and ...
CrSb0001's user avatar
  • 2,307
12 votes
1 answer
2k views

A check is a win

Consider a normal game of chess with one change. As soon as you put the opposing king in check you have won. If both players play optimally, how long is the game?
Simd's user avatar
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9 votes
1 answer
3k views

Two-Move Chess Game

Consider a standard game of chess. We make the following modification: on a turn, if a player makes a move which neither captures a piece nor puts their opponent’s king in check, then they may make a ...
godlification's user avatar
11 votes
2 answers
1k views

Retrograde Analysis Problem Inspired by Various Chess Memes

Standard Retrograde Analysis conventions are used. In addition, the following rules also apply: White must begin the game with 1. d4 and 2. Bf4 If capturing en passant is legal then it is mandatory. ...
happystar's user avatar
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25 votes
1 answer
3k views

Chess with jumping

Puzzle Statement: Consider the game of chess, but with a slight modification of the rules as follows: all heavy pieces (i.e., the queens and rooks) are allowed to jump as far across the board as they ...
acegikmoqsuwy2000's user avatar
1 vote
2 answers
1k views

16 queens puzzle

Can you place 8 white queens and 8 black queens on an 8x8 grid, such that no two queens of the same colour occupy the same row, column or diagonal?
Dmitry Kamenetsky's user avatar
2 votes
2 answers
210 views

Chess 960 and Castling #2

For how many Chess 960 starting position you can play into a position such that the game requires castling? Again for "standard" chess, this is impossible(§): You must let a bishop out, but ...
Hauke Reddmann's user avatar
3 votes
2 answers
119 views

Chess 960 and Castling #1

You are given a Chess960 starting position, but you don't know it is actually the starting position (the knights and maybe other pieces moved around). For which of the Chess960 starting positions you ...
Hauke Reddmann's user avatar
12 votes
1 answer
2k views

Poison ivy chess: Can the king get to safety?

The king is on a chessboard filled with poison ivy bushes. Can the king get to safety? Details: The king is initially located at the top left-hand corner square of the chessboard. The finite ...
Will Octagon Gibson's user avatar
6 votes
1 answer
276 views

Permuting officers during a Chess960 game

There are... let me see... ah yes 960 different possible starting positions in Chess960. Suppose the players never move a pawn, or make a capture, but simply move their officers so that eventually ...
Laska's user avatar
  • 1,919
4 votes
1 answer
306 views

Moving a knight to a new square each turn: who wins?

Alice and Bob are playing a game. Alice starts by placing a knight on the chessboard. Then they take turns moving the knight to a new square (standard chess rules apply: the knight moves in an "L&...
Louie's user avatar
  • 153
5 votes
1 answer
462 views

Gravity Chess - Slipping Through the Cracks

Chess Mate Attack is a mobile puzzle game released earlier this year. Each of its 90 (at time of writing) levels follows the same basic principles: Play takes place on an $m×n$ chessboard, whose ...
AxiomaticSystem's user avatar
16 votes
2 answers
1k views

Scholar's mate with queen excluder

The queen excluder is a type of barrier used in beehives which lets through small worker bees but not the larger queen bee. Extending this simple but powerful concept into the chess world, let's ...
Jafe's user avatar
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17 votes
5 answers
4k views

5 chess pieces dominating a 5x5 grid

This is a puzzle based on work by Rodolfo Kurchan. Can you place a pawn, a knight, a bishop, a rook and a king on a 5x5 chess grid, such that every empty cell is attacked by at least one piece? Note ...
Dmitry Kamenetsky's user avatar
11 votes
1 answer
313 views

A look at the rooks

Let's book a look and figure out the rooks from the mooks. Which ones are the original kings' rooks? This was composed by Boris M. Klementjew and published in Shakhmatnaya Kompozitsiya 15, page 60, ...
Rewan Demontay's user avatar
8 votes
1 answer
1k views

How many moves to reach this position?

I was recently introduced to this lovely mate in 1 puzzle. It’s best when shown on a physical chess board. But what is the smallest number of moves it would take to reach this position?
Simd's user avatar
  • 7,845
8 votes
1 answer
914 views

What did I do wrong?

My friend and I were bored so we decided to play a game of chess. I lost, for I have done something bad. I was a beginner, so I could not find where I went wrong. I wanted to know what was wrong, so I ...
poco's user avatar
  • 2,158
7 votes
2 answers
287 views

Kingly Laziness

What is the minimum effort the White king must put into arriving at this destination? His Majesty is not feeling productive today. This position was composed by Gianni Donati and published in Phénix ...
Rewan Demontay's user avatar
1 vote
0 answers
173 views

Ma Drasi and her kitchen in need of paralyzation

I visited Ma Drasi's kitchen today, and it was a hot mess, both temperamental and situation-wise. The rooks were rattling, cooks were crying, snooks were shattering, and crooks were flying and defying!...
Rewan Demontay's user avatar
11 votes
2 answers
523 views

A balanced banquet

As your king's fitness adviser you have been tasked with optimising His Majesty's diet. This entails making sure that the king eats equal amounts of carbs (rooks), fat (bishops) and protein (knights). ...
loopy walt's user avatar
  • 21.3k
8 votes
1 answer
248 views

Chess 960 playing aliens abducted me

Is there a SE law against packing a puzzle into a silly story? :-) Reference Some words QAT found for unique Chess960 positions So, it was night, I was walking home from a tourney, and a veeblefetzer ...
Hauke Reddmann's user avatar
6 votes
3 answers
2k views

The Biggest Chess Blunder

Everyone knows that sinking feeling when you blunder your queen in one move, but it could be worse. In the position above, Black plays Nf7. This blunders a knight in one move, as well as a bishop-...
ApexPolenta's user avatar
  • 2,834
5 votes
2 answers
1k views

The best scoring REVOLVER

The initial setup a chess game creates this layout: P P P P P P P P R N B Q K B N R If we change the symbol each piece is represented by, something interesting ...
Rewan Demontay's user avatar
5 votes
3 answers
403 views

Black to move. Find all possible #-1

In the middle of researching a new chess AI by pitting bots against each other, the researchers notice the below position just before Black wins on the next move. They are confounded for a minute ...
Shuri2060's user avatar
  • 3,068
13 votes
2 answers
3k views

What's the most distant chess position?

It's well known that the combinatorial explosion means that there are many, many, possible chess games. And yet most games are decided within 100 moves, and Wikipedia says that the longest tournament ...
Spitemaster's user avatar
  • 1,283
29 votes
4 answers
3k views

Rolling cube on an infinite chessboard

Imagine a six-sided die, D6, the right size to exactly occupy a square on a chessboard. The die can move to any adjacent square, but does so by rolling rather than sliding, so the topmost side of the ...
Laska's user avatar
  • 1,919
35 votes
5 answers
3k views

A Queen and her Pawns

Place a queen and as many pawns as possible on a chessboard so that the queen has just one way of capturing all the pawns in precisely as many moves as there are pawns. Pawns do not move and do not ...
Bernardo Recamán Santos's user avatar
1 vote
1 answer
249 views

A position where both sides have no moves at all, not even to put yourself in check

Inspired by this: No moves at all, not even to put yourself in check Similar to the question linked above, find an arrangement using the fewest chess pieces (total from both sides), except for this ...
blademan9999's user avatar
3 votes
2 answers
227 views

From white to black

This puzzle is part of the Monthly Topic Challenge #7: Board games. Place a knight on each of the white squares on the 8x8 chessboard. That would make a total of 32 knights. Is it possible to use a ...
Scratch---Cat's user avatar
6 votes
1 answer
1k views

Sixty-three knights on a chessboard

This puzzle is part of the Monthly Topic Challenge #7: Board games. If we're using rooks, then this would be equivalent to a classic "fifteen puzzle" though on a larger grid. This time we'...
Scratch---Cat's user avatar
11 votes
1 answer
453 views

Hippos and Horseplay

This is part 5 of the puzzle series Around the World in Many Days. Each part is solvable on its own. Deаr Puzzling, This time you are going to need some of your chess knowledge. Not a lot of chess ...
Jafe's user avatar
  • 77.2k
5 votes
2 answers
700 views

Bow or lazy checkmate?

Suppose that both players cooperate, find the shortest, in terms of number of moves, black checkmate such that the game is valid and white pieces never go on rows 4 to 8. e.g. ...
JKHA's user avatar
  • 6,033
6 votes
2 answers
288 views

Need help with old cipher

I found a "drawing" in a 60 year old notebook of my grandfather and I am trying to solve it. First I thought it was the "Drunken bishop algorithm" but then I found out that this ...
TryonGravity's user avatar
5 votes
3 answers
430 views

Laziest Checkmate

Consider a game of chess where White delivers checkmate in their $X^{th}$ move. For all the pieces that remain on the board at the end of the game, consider their Manhattan Distances from their ...
Manish Kundu's user avatar
  • 2,684
3 votes
1 answer
172 views

The longest shortest sequence of series moves

Being inspired, I concoct a question. It starts from a set chess board with only the White pieces. Chess problems in which only one side moves are called seriesmovers. What is the longest shortest ...
Rewan Demontay's user avatar
10 votes
1 answer
541 views

Knight of the Isles

Today the Knight of the Isles must cross the archipelago to get to the castle. The knight is at the bottom left, the castle at the top right. The green squares are islands of grass, the blue squares ...
Florian F's user avatar
  • 30.1k
3 votes
1 answer
301 views

An overconfident grandmaster 2

The same grandmaster from An overconfident grandmaster decides to avenge his loss and prepares for rematch. He ends up in a winning position once again. He decided to place a bet again. He gives the ...
I'm Nobody's user avatar
  • 1,334

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