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Questions tagged [checkmate]

Questions relating to checkmating.

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5 votes
2 answers
43 views

Phase 1 of Knight Bishop Checkmate

I am working on my basic endgames and I am aware that knowing the Knight and Bishop Mate is unlikely to come up anytime soon, but I still want to know this better. Once we reach a position like the ...
5 votes
2 answers
2k views

Why was this a draw? What move I supposed to play to win?

I'm playing as Black. Why was this a draw? What move I supposed to play to win? [FEN ""] [StartPly "104"] 1.e4 d6 2. Bb5+ c6 3. d4 Nf6 4. Bxc6+ bxc6 5. c4 Nxe4 6. Qa4 Nf6 7. c5 h6 ...
6 votes
4 answers
4k views

Do the rules of chess state that a Bishop+King can be sufficient mating material?

A famous recent example of this ending happened last year between Carlsen and Firouzja. Here, Firouzja time ran out, so Carlsen won [Title "Alireza Firouzja-Magnus Carlsen, World Blitz Championship,...
8 votes
2 answers
1k views

Why was this stalemate?

I'm new to chess and I don't have much knowledge. But I was playing a game as Black, and I was up by a lot of material and played Nxc4 to capture White's last bishop. The game ended in a stalemate, ...
8 votes
2 answers
602 views

Is this a chess variant? Chess without taking pieces!

I just noticed a special style of playing chess in some of the top games in chess.com; A chess without taking pieces: The whole game here: [FEN ""] [Event "Live Chess"] [Site "Chess.com"] [Date "...
2 votes
1 answer
542 views

What is the largest n such that discrete forced mate in one through mate in "n" exist?

This is admittedly a bit of an obscure question, so I apologize for the awkward wording of the question. To begin, assume you are playing as White, and that a "forcing move" is any move that ...
3 votes
1 answer
77 views

What is the shortest possible way to checkmate your opponent without using a Queen? [duplicate]

I know about the 2 move mate where the 2 side pawns move up and the Queen comes in and delivers a swift checkmate, but what if the Queen was not being used, or wasn't on the board in the first place?
5 votes
2 answers
3k views

Is there any position where giving checkmate by En Passant is a brilliant move on Chess.com?

I have seen many en passant checkmates, but I have never seen one that was a brilliant move. Is there any position where giving checkmate by en passant is a brilliant move on Chess.com?
4 votes
1 answer
150 views

Longest forced win with a rook

What is the longest forced checkmate where the winning side has only a rook? I know this position where White has a mate in 67: [FEN "2K4k/7p/8/8/8/8/3R4/n7 w - - 0 1"] 1. Kd7 Nb3 2. Rb2 ...
51 votes
3 answers
17k views

How fast can checkmate occur by just moving the king?

How short can a game be in which (after the first move) one player moves only their king, and yet checkmates their opponent? This is assuming that the players cooperate, i.e. this is a kind of "...
2 votes
2 answers
141 views

Rook vs Bishop on odd-order board

Suppose White has King and Rook and Black has King and Bishop on a square board of odd size (such as 9x9). Is it generally possible for White to force checkmate?
8 votes
1 answer
273 views

What are the commonest checkmating moves in the Lichess (or similar) database?

I'm curious what checkmating move is the most common in the Lichess database? That is, the properly algebraically specified move, for a given color, like "White plays Re8#". Answers for ...
30 votes
9 answers
12k views

Why is it not a checkmate?

I am new to chess. I have tried to learn checkmate from the video lesson in chess24 website. There, in one question, it marked my answer wrong and said that it was not checkmate. Can anyone please ...
3 votes
1 answer
122 views

Most delaying moves before checkmate

Consider a position where if was player A's turn, they could make a series of moves ("the mating sequence") with forced mate. However, it is player B's turn, and they can make a series of &...
3 votes
1 answer
157 views

On a toroidal board, which pieces are needed to checkmate?

I saw this question On an infinite board, which pieces are needed to checkmate? and was inspired by it. Many mating combinations won't suffice on a toroidal board. For example, queen vs king will be a ...
0 votes
2 answers
398 views

Checkmate with only relevant pieces

What is the maximum number of black and white pieces which are relevant in a checkmate position (by White)? That is if any piece (black or white) was removed from the board, the checkmate would not be ...
14 votes
4 answers
1k views

Outside-the-box mate-in-one challenge

I've received an (I would say impossible) mate-in-one challenge and I have already checked all movements, but couldn't solve it yet. It came from a trustable source and they say you need to think ...
7 votes
4 answers
3k views

Most mate options after 6 moves

Found this construction problem from '83 and liked it. I don't know the best solution (yet), and maybe you can top it anyway. Consider the (help) "game" 1.e4 a6 2.Bc4 a5 3.Qh5 a4. Now White ...
3 votes
0 answers
232 views

The Most Frequent Checkmate Patterns

Of the main checkmate patterns which are the most frequent (in games that ended with a checkmate)? Based on chess literature the Back-rank mate is arguably the most common, I would expect the Queen ...
9 votes
6 answers
20k views

Check for checkmate

So I am implementing an intelligent chess agent but I can't get the checkmate working. I was wondering if there is a program that takes the chessboard notation and returns a result of yes or no to ...
4 votes
3 answers
436 views

Does this knight and rook mating pattern have a name, or has it occurred before?

[fen "5k2/8/1R6/5r2/P7/1P4P1/6KP/5n2 b - - 0 40"] With black to move, remarkably it's mate in 2 (at first glance, it looks like black may struggle to even draw). It occurred in a recent LiChess game ...
2 votes
2 answers
233 views

Is there a name attributed to this type of checkmate pattern?

I was going over an old lichess.com game when I realized that the checkmating pattern seemed familiar. [FEN "5rk1/p4pp1/1p5p/2p4Q/2P3R1/P4q2/6RP/4r2K w - - 0 1"] Here it is boiled down, ...
2 votes
4 answers
322 views

Is there a name for this mating pattern?

What's the name of the mating pattern starting with the move 21...Ng4!? [FEN ""] 1. d4 Nf6 2. Nc3 c5 3. d5 e6 4. e4 exd5 5. exd5 d6 6. Nf3 Be7 7. Bb5+ Nbd7 8. a4 O-O 9. O-O b6 10. Bc6 Rb8 ...
20 votes
4 answers
6k views

Is there a double-forced mate position?

A usual forced mate position is where the winning player can play in a way that ensures checkmate, no matter what (legal) moves the opponent makes (unless the game ends due to a non-play reason, i.e. ...
4 votes
1 answer
1k views

Mate in 4. Difficult. Going crazy

A friend sent me this puzzle. He insists that Black has a mate in 4. I just can't find it. Can someone see a mate in 4 moves here?
1 vote
1 answer
154 views

Are Stockfish "Mate in X" counts ever over-optimistic?

When Stockfish gives an evaluation of, say #15, I have seen cases where this is pessimistic, and it subsequently revises its evaluation to say #9. Are there cases where it thinks it can mate in 15, ...
0 votes
1 answer
98 views

Why does Stockfish only gives -28 to a game with only a W pawn and a B rook remaining, while it should be resolved in perfect play?

In this position (W resigned) with only a pawn and a rook remaining Stockfish should have resolved the game and say "Mate in xx" (with perfect play). However Stockfish is said to have ...
0 votes
1 answer
213 views

Questions about legality of last move

Question for FIDE Arbiters and similar knowledgeable folk... FIDE Law Article 5.1.1 The game is won by the player who has checkmated his/her opponent’s king. This immediately ends the game, provided ...
0 votes
2 answers
190 views

Mate in 2 from "The soviet Chess Primer" but wrong

I found this exercise on page 51 of the "The soviet chess primer" and I think there is a mistake. Chess.com analysis says there is a mate in 13 moves. I'm correct thinking there is a mistake?...
-2 votes
1 answer
313 views

Mate Solving or problem solving software

I have some positions in my games which engine analysis indicates that some lines (not the ones I played) lead to a checkmate in 6 or 7 or 10 moves. But normal engines are not reliable here so I use ...
27 votes
6 answers
13k views

Why is this a checkmate?

I'm new to chess and I'm confused about a puzzle I was practicing. As you can see my black queen has put the white king in check, but I'm confused how this is possible if a rook is right next to my ...
0 votes
0 answers
138 views

Unique checkmates count analysis

How many unique checkmates are there from this starting position? I can only see 5 lines on lichess from a game I've played and have tried several different moves. Mate in 4 is the fastest but I've ...
2 votes
1 answer
200 views

Is there any sequence of premoves that guarantees checkmate in this particular King + Queen vs King endgame?

King + Queen vs. King is perhaps the most basic winning endgame and known to be mate in at most ten moves. However, I am wondering if there is any sequence of premoves that guarantees checkmate? For ...
2 votes
2 answers
227 views

Timeout vs Insufficient Material

This is not a new topic but it did happen in my game at chess.com. I was playing white and played the only legal move h7 and was checkmated on the next move. My question is: What will happen if I just ...
14 votes
1 answer
3k views

Checkmate in ω² moves with finitely many pieces

The post Checkmate in ω moves? has inspired a lot of discussion and mathematical research into positions on an infinite chessboard where white can mate in a transfinite amount of moves. The current ...
0 votes
1 answer
147 views

A puzzle where you must find the mate in 3 solution but avoid mate in 2 and mate in 1 solutions?

I want to see if a puzzle could exist where you must avoid finding mate in 1 or 2 but just find the mate in 3 solution. This is not subjective it is a hard math problem to make a move that forces mate ...
15 votes
5 answers
1k views

Is it possible for a white piece to deliver check to the black king, but for black's counter move to result in white getting checkmated?

Is it possible for a white piece to deliver check to the black king, but for black's counter move to result in white getting checkmated? Has this happened in games between top players?
7 votes
0 answers
254 views

How much would chess change if Black always had the last move?

In a hypothetical minor variant, could White's first-move advantage be compensated for by Black's right to last move? Normally, White wins have White play N+1 plies to Black's N. How would the game ...
0 votes
1 answer
166 views

Why did I lose -> I thought I can swap king and castle to avoid checkmate? [duplicate]

[FEN "6nN/Bp1k2pp/2n5/p7/Q4R1P/5pP1/P3qN2/4K2R w K - 0 1"] As you can see my king got checkmated through the enemy's queen and pawn. My question is, why is this a checkmate? I haven't moved ...
-2 votes
1 answer
218 views

The king had a place to move, how is this checkmate?

The king had a place to move, how is this checkmate?
7 votes
4 answers
1k views

What is the highest number of pieces from one side that can be involved in a checkmate?

What is the highest number of pieces from one side that can be involved in a checkmate? "Involved in a checkmate" is defined below. A non-king piece is involved in a checkmate 'if removing ...
8 votes
2 answers
2k views

Most pieces involved in checkmate in actual game?

I recall seeing a number of chess games where a lot of pieces are involved in the final checkmate, and was curious to know what is the maximum number of pieces of one player A that have been involved ...
3 votes
1 answer
273 views

Mate-in-N problems where N scales indefinitely with board size

Motivation - Long range mating patterns This question is inspired by my recent interest in infinite chess and the post on MathOverflow Checkmate in ω moves?. Since my chess endgame skills are quite ...
5 votes
1 answer
231 views

Running out of time mid promotion to checkmate. Who wins?

In a casual blitz game I had with my friend, my last move was to promote a pawn, to ladder mate my opponent (there was already a rook on the 7th). I moved the pawn, but while I was reaching for the ...
21 votes
5 answers
7k views

A position with the only legal move resulting in checkmate

Theoretically, is it possible that for some position, the only legal move for a side leads to a checkmate (that is, the opposite king gets checkmated)? If so, has this ever occurred in a real game?
4 votes
0 answers
102 views

King and short rook checkmate

Suppose White has a king and a range-x rook and black has a bare king on a chessboard with dimensions y times y. What is the minimum value of x such that for all sufficiently large y, White, moving ...
8 votes
4 answers
7k views

Can a pawn move 2 spaces if doing so would cause en passant mate?

You cannot place your King in check, the en passant could be refused and because you are not placing your King in check directly it seems you can move your pawn 2 spaces. However, just like castling, ...
3 votes
2 answers
444 views

Are there any hard mate-in-2 problems?

I'm interested to know if there are any particularly challenging mate-in-2 problems. Since the second move will be essentially forced, the problem essentially comes down to 1 move. Typically, the ...
8 votes
1 answer
545 views

How to checkmate with king + two knights vs king + pawn

King + two knights vs a king is a book draw, as the knights cannot get the enemy king into a checkmating position (only a stalemating position), because of the inherent clumsy nature of the knight. ...
12 votes
2 answers
3k views

What is the fastest loss by a GM in a FIDE classical game?

What is the shortest FIDE classical game a grandmaster lost? It can be either resigning or checkmate. The opponent doesn't necessarily need to be GM. Forfeits don't count. Only serious games count, ...

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