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121 votes
Accepted

Mate in 0 moves

White must Indeed Note that
Evargalo's user avatar
  • 6,153
98 votes
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Checkmate in 1 on a Tangled Board

Since the puzzle turned out to be way hairier than expected, my earlier answer got quite messy and hard to follow, so here's a complete rewrite. It's still very clunky, but I hope it's much clearer ...
Bass's user avatar
  • 76k
88 votes
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Can White Castle?

Now that we have three increasingly complex proofs (two deleted, one of them mine) that it's impossible, it's pretty clear that it must be Here's why: This is, without doubt, the most refreshing ...
Bass's user avatar
  • 76k
83 votes

Mate in 0 moves

I see Evargalo has found the right answer, but the first thing that occurred to me was
Especially Lime's user avatar
57 votes
Accepted

Crippled King Crossing a Canyon

Explanation:
f'''s user avatar
  • 33.6k
53 votes

How can 3 queens control the white squares?

I think this arrangement works for the bonus question:
Zoir's user avatar
  • 1,713
50 votes
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An Easy Mate In 1

The mystery The mate Additional note
Reti43's user avatar
  • 1,935
50 votes
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Can a chess player promote all pawns to queens?

This 40 move solution on lichess works, and while it may not be the most orderly solution, it is impossible to create a solution in fewer moves since I'm using optimal pawn movement at every step and ...
Lolgast's user avatar
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48 votes
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How can 3 queens control the white squares?

I think this will do it
hexomino's user avatar
  • 133k
47 votes
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The Knight and the Maze

If my Python programming is to be believed, the minimum number of moves required is 41:
r3mainer's user avatar
  • 9,621
44 votes
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Chess : The Lone King

Here's a solution: Here's some of the logic for finding it: Here's a link to the moves: Clear the board! And here's a gif (thanks to chess.com's gif maker):
Dr Xorile's user avatar
  • 22.8k
42 votes
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Trapping The Knight

I can get the knight trapped in 15 moves: $$\begin{array} {ccccccccc} \cdot & \cdot & \cdot & \cdot & 5 & \cdot & \cdot & \cdot & \cdot\\ \cdot & 3 & \cdot &...
Deusovi's user avatar
  • 145k
39 votes
Accepted

Rooks on a 15x15 chessboard

Slepz's user avatar
  • 1,438
39 votes
Accepted

A very unique chess puzzle

I've found the actual answer: Then: Because: Picture:
boboquack's user avatar
  • 21.9k
38 votes
Accepted

lolcatz can haz ur infinit cheeseboard

Unless I'm mistaken, the result is Reading through the wall of text, the rules seemed a bit too complicated for it to be "just some random game", so figuring out the magic seemed ...
Bass's user avatar
  • 76k
36 votes
Accepted

Swapping rooks in a 4x4 board

I wrote a computer program and it showed that $18$ moves is the optimum. Here is one such solution: Oddly enough, even if you relax the condition of alternating white and black moves, it cannot be ...
Jaap Scherphuis's user avatar
35 votes
Accepted

What was I supposed to do?

Building on samm82's answer, and fixing the French fashion designer answer as Enigma said, you get As Graylocke observed, Removing every other letter reveals i.e. the solution is Edit: just ...
berkeleybross's user avatar
34 votes

Two Knights, two Bishops, two Rooks and two Kings on a 4x4 chessboard

I'm not trying to solve the puzzle, I'm just interested in how many solutions there are, since the OP claims he doesn't know. I brute forced it with a program. There are First of all, there are ...
Reti43's user avatar
  • 1,935
34 votes

Can White Castle?

(Edit: so this is wrong..) Brilliant puzzle! The answer is: [Spoiler alert! Scroll down at your own risk] We proceed by contradiction. Assume that indeed, White can castle. We have the ...
greenturtle3141's user avatar
34 votes
Accepted

Queens attacking exactly one queen

Daniel Mathias's user avatar
32 votes
Accepted

Another Easy Mate in 1

It's simple: This gives the position: which is clearly mate. NB:
boboquack's user avatar
  • 21.9k
31 votes
Accepted

A Puzzle That Marches Swiftly To The Median

I think the answer is: Pawn: Rook: Knight: Bishop: Queen: King: Hidden word: Title:
Wu33o's user avatar
  • 6,840
30 votes
Accepted

Desegregate the Knights

Give these names to all the squares: 163 4 8 725 Each number can only be accessed by way of the numbers before and after it (where 8 wraps around to 1). That ...
Deusovi's user avatar
  • 145k
30 votes
Accepted

Why isn't this chess puzzle trivial?

This has something to do with the way computers evaluate positions. They will first count the value of each side's pieces (usually: pawn = 1, knight/bishop = 3, rook = 5, queen = 9) and then some ...
Glorfindel's user avatar
  • 27.9k
30 votes
Accepted

Checkmate 30 kings with rooks

Here's a solution with 11 rooks and 1 king: kkkRkkRk/2kRkkRk/R1kkkkkk/2k2Rk1/k1k1R1k1/k4Rk1/kRkk3R/kR1kkk1K b - - 0 1 https://lichess.org/editor/kkkRkkRk/2kRkkRk/R1kkkkkk/2k2Rk1/k1k1R1k1/k4Rk1/kRkk3R/...
RobPratt's user avatar
  • 12k
29 votes
Accepted

How did four chessmen disappear?

This seems to work: And the position looks like this: Apart from the symmetrical solution, this might very well be unique:
Bass's user avatar
  • 76k
29 votes
Accepted

A Checkmate of Dubious Legality

I claim that The reason:
Deusovi's user avatar
  • 145k
29 votes

Chess solitaire: The King's longest walk

First solution - 50 moves Second solution - 59 moves Current solution - 66 moves (beaten by Retudin - 70 moves and Rewan Demontay - 139 moves) Moves:
Sleafar's user avatar
  • 18k
28 votes
Accepted

Can you save white in this chess position?

Cheaty solution Once upon a time, the rules of chess With these rules, White can (The rules were fixed some time ago.) As for the three questions: perhaps the answers are: Alternatively: ... Of ...
Gareth McCaughan's user avatar
28 votes
Accepted

There is only s̶i̶x̶t̶y one place he can be

The white king must be on square Explanation: So, what was the last move? But ... So,
Glorfindel's user avatar
  • 27.9k

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