81 votes

Why is this a checkmate?

To get out of check, the king needs to move to a square that isn't attacked by any opposing pieces, or you need to capture/block attacking pieces such that the king is no longer under attack on its ...
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  • 1,022
56 votes

How can I prevent checkmate in this position?

Initial Analysis White is clearly in a dire situation, since Black is threatening mate in one on either h7 or h8 if White doesn't do anything. But the White king can't move nor can White get rid of ...
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53 votes
Accepted

How fast can checkmate occur by just moving the king?

Here is a starter solution in 7 moves. Can we do better? [FEN ""] 1.g3 e5 2.Bh3 Ke7 3.Bxd7 Kxd7 4.Kf1 Ke7 5. Kg2 Ke6 6.Kh3 Kf6+ 7.Kh4 Kg6# If this is best, interestingly, the play is ...
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  • 12.8k
51 votes
Accepted

How is this position possible in a normal game of chess?

Double check is only possible by using discovered check. So either the rook check or the bishop check was discovered by moving something in between on the previous move. I don't see how that's ...
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  • 25.8k
47 votes

How fast can checkmate occur by just moving the king?

It's impossible to checkmate faster than 7 turns (handicap on black) or 8 turns (handicap on white). Proof by elimination I'm going to argue from the perspective that white is helping and black is ...
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  • 571
46 votes
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How is this situation not a checkmate?

It is not checkmate because Black can interpose a piece to block the check from the bishop: move knight or queen to e6. It's still only a miniscule delay for the inevitable. [FEN "1rk4r/1p6/3p3q/...
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  • 10.2k
43 votes
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A mysterious mate in one

Looking at the problem as if the black King is currently invisible...
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40 votes
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Is the position in this trick question reachable?

Even though the board is upside down, the position is still easily legal. [FEN ""] [startply "86"] [StartFlipped "1"] 1. a4 h5 2. g4 h4 3. Bg2 Rh5 4. gxh5 h3 5. h6 e5 6. ...
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39 votes

Can a player in check win, by checkmating the opponent, while not getting themselves out of check?

For this kind of question, if you have doubts, just play chess with the goal of capturing the enemy king. The first player to capture the enemy king wins. This isn't the official rule, but it's ...
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  • 21.3k
37 votes
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Why is it not a checkmate?

Welcome to Chess Stack Exchange. I believe you're doing well here. It is surely a checkmate. Probably the website isn't programmed that way to recognize that move. But, as per your question, this is ...
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37 votes

Can a player in check win, by checkmating the opponent, while not getting themselves out of check?

According the FIDE LAWS of CHESS: 3.9.2 No piece can be moved that will either expose the king of the same colour to check or leave that king in check. So as @djnavas points out, if you are in check ...
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  • 483
35 votes
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En Passant Checkmate

It is not checkmate if the other player has any legal move that gets them out of check. Capturing the checking piece is one such way; whether the capture is en passant or not is irrelevant for the ...
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  • 10.2k
35 votes
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Why can white not mate in this position from Bobby Fischer Teaches Chess (frame 73)?

The bishop on c2 can be moved to h7 to block the check.
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34 votes

Why is this position checkmate?

The queen is protected by the bishop on h2, so the black king cannot take the queen. Nothing else can take the queen and the queen covers b8 and d7.
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33 votes
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Games where a pawn checkmates the king

One amazing game I know that ends in a pawn mate in one called The Polish Immortal in which Black sacrifices all four minor pieces to win the game! The pawn does a double-step to give the mate. [Title ...
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33 votes
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Can a player resign after checkmating their opponent?

No, this is not possible. for example move the piece, don't press the clock and then resign? In particular, that loophole is explicitly covered by the rules: 6.2.1 During the game each player, ...
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  • 23.8k
31 votes
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When you check someone, do you have to say "check"?

In a tournament game, you are not supposed to speak at all other than to offer a draw or adjust a piece. This includes saying check. This tends to seep into casual games among more experienced players ...
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  • 7,388
31 votes

A position with the only legal move resulting in checkmate

I want to offer a semi-realistic example. I think I have seen something like this in a game by masters in some book, but of course I cannot recall where. But this is something that at least can be ...
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  • 1,496
30 votes
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What is the solution to this mate in 2 puzzle?

It is a nice little puzzle: 3k4/3P4/3Q4/8/8/8/8/4K3 w - - 3 13 1. Qd5 Kc7/Ke7 2. d8=Q# 1-0
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  • 23.8k
29 votes

What moves solve this mate in 2?

White to play checkmates in 2 with 1 d4+! exd3 e.p. 2 Qbf4#. Black to play cannot checkmate in 2 but should win after Bxf7. 7r/1p3Q1p/2q5/3bk3/1Q2p3/2P5/r2P2PP/2KR4 w - - 0 1 1. d4+! exd3 2. Qbf4
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28 votes
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How many different ways are there to checkmate in the early game?

There are no checkmates from 0-3 ply. 4 ply: 8 checkmates, 197,281 total nodes 5 ply: 347 checkmates, 4,865,609 total nodes 6 ply: 10,828 checkmates, 119,060,324 total nodes 7 ply: 435,767 checkmates,...
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  • 2,983
26 votes

What is the highest number of different mates in 1 you can have in one (legal) position?

[FEN "1B1Q1Q2/2R5/pQ4QN/RB2k3/1Q5Q/N4Q2/K2Q4/6Q1 w - - 0 1 "] 105 mates — Nenad Petrovic, Sahovski Vjesnika 1947 (Chess Problem Database) In this position any check is mate. There are 3 knight mates ...
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  • 3,226
26 votes

How is this checkmate?

The position shown in board 2 is not a checkmate, as you correctly say. The book is not completely clear here. The sentence "Checkmate with Queen and King" is only the task of an exercise: you have ...
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  • 1,149
26 votes

Why is this a checkmate?

Rook at d2 is pinned by the bishop at g5 and hence the rook can not capture the black queen at c2 checkmating the white king at c1.
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  • 620
26 votes

Why is this a checkmate?

Since you are a beginner in chess first you need to understand the term pin in chess. In chess, a pin is a situation brought on by an attacking piece in which a defending piece cannot move without ...
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  • 1,371
25 votes
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What is sufficient mating material?

Most basic first - this rule is the reason that King vs King is an immediate draw. Neither side has a piece to check with, let alone checkmate with. A position that is a draw because neither side can ...
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  • 25.8k
25 votes
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How is mate guaranteed - Bobby Fischer 134

However, if black takes with Rook, then Knight takes' white's rook, white rook to take knight, then black rook to take white rook. This prevents the Qe8 mate, doesn't it? No, it accelerates it. Let's ...
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  • 74.6k
24 votes

KBN vs K checkmate on nonstandard boards

Actually, the bishop and knight mate is not as slippery as it appears. I have checked this on a tablebase program I wrote. On a 10x10 board, the side with the bishop and knight (say white) can force ...
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24 votes
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Moving into check for a draw as black, why is it illegal? Comparison to Racing Kings

Imagine a variation of chess without the rules about check and checkmate, where a player wins simply when he captures his opponent's king. In this variation, Kxd5 loses the game to exd5. Turns out, ...
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24 votes

What's the etiquette for giving checkmate on board?

This is really a question for fairly low-rated players, who tend to play things out to the bitter end. If you are reasonably strong, the only reason your opponent does not resign earlier is that he ...
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  • 31.9k

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