Questions tagged [records]

For questions related to (world) records in chess, e.g. the longest game (in moves or in duration), highest obtained rating, longest mate in n puzzle, etc.

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26
votes
1answer
5k views

What is the fastest way to reach stalemate?

It is known that the minimum number of moves required for checkmate is 2 moves (4 half moves) resulting in a victory for Black. However, what is the minimum number of moves required for stalemate? ...
20
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1answer
4k views

Shortest stalemate in serious tournament game

I am looking for the shortest stalemate that has occurred in a serious chess game (there were no agreements between the players). So far, I have found only compositions, but is there a real game where ...
20
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2answers
2k views

From the start of the game what is the longest possible series of consecutive white moves where white can do those moves no matter what black does?

From the start of the game what is the longest possible series of consecutive white moves where white can do those moves no matter what black does? So I want the longest list of moves white can do ...
19
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5answers
2k views

Longest sequence of mutually forced moves

In this position, the black move 1. ... Qc3 results in two consecutive forced moves, Kxc3 and Ke7: 2rkr3/2p5/2q5/8/8/8/3KP3/3R4 b - - 0 1 1... Qc3 2. Kxc3 Ke7 What is the longest sequence of ...
18
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4answers
3k views

What is the longest known sequence of forced moves leading to a checkmate for one side?

By forced move, it is meant that the player has only one legal move. [fen "7k/q5Q1/p4PPK/6PP/8/5P2/8/8 b - - 0 1"] 1... Qxg7+ 2. fxg7+ Kg8 3. f4 a5 4. f5 a4 5. f6 a3 6. f7# Above is an example with ...
17
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4answers
2k views

Fastest possible checkmate by en passant

En passant is somewhat of a rare move in chess. Checkmating by en passant, however, is an even rarer occurrence. But suppose both sides had the same goal to help cause a checkmate to their opponent ...
13
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3answers
439 views

Fastest King vs King endgame

What is the fastest possible game that ends in a King vs King endgame? Please post a game and tell me the number of half-moves you've achieved. By some simple logic, I can prove that this number is ...
11
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3answers
3k views

Shortest possible game with 18 queens?

The selected answer to this question shows a game in which all 16 pawns promote to queens so that there is a total of 18 queens on the board. It takes 80 moves... What is the shortest sequence of ...
11
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3answers
2k views

Maximum possible movement in a turn

I've read that for any position, there are on average approximately 35 possible moves. But what's the maximum number of possible moves for a position?
10
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7answers
12k views

Longest chess game possible (maximum moves)

What is the longest chess game possible in terms of chess moves? I read somewhere that there is a theoretical maximum of 5949 moves. But I don't see any proof and I don't think it is correct. Can it ...
10
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5answers
1k views

What is the longest known stalemate your opponent in x-moves problem?

What is the longest known stalemate your opponent in x-moves problem where the given stalemate is the fastest one from the initial position? A win is not possible, but stalemating your opponent so ...
10
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1answer
2k views

What longest number of moves for a forced mate position (including draw rules)?

What is the longest (currently discovered) number of moves for a forced mate position where players will use both the 50-move draw rule and the 3-fold repetition rule if it will help them avoid losing?...
10
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1answer
1k views

Mate in N. What is the largest N known?

What known position has one side with a forced mate in N moves, with N the largest? I came across one with 517 moves using only 7 pieces, so there should be much be larger. (Ignoring the 50-move rule)....
9
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7answers
358 views

Position with the most (or many) distinct refutations?

I'm looking for a chess position, hopefully not too contrived, in which it's Black's turn, he has several moves, but each one is refuted by a mate by White. I know I could take any mate-in-two ...
8
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3answers
2k views

Maximum number of pieces on board in dead position

It is possible in a chess game to have a dead position in which both players have all eight pawns, one bishop, and a king--20 pieces total. If the two players' pawns are interlocked in "zig-zag" ...
8
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3answers
2k views

What is the most queens that have been on the board in a grandmaster game?

There are quite a few grandmaster games with 3 queens or 4 queens, but what is the highest number of queens on the board in a game between two GMs? I'd be interested in both the most on the board ...
8
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3answers
487 views

Problems: record for most mates-in-2

Does anyone know what the record for most mates-in-2 is for a composed problem? Example: this one has 58 different moves that mate in 2. [FEN "6R1/8/8/8/3Q3B/5K2/7k/1R6 w - - 0 1"]
8
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1answer
296 views

Which chess position requires the most moves to reach?

For each legal chess position there exist a shortest sequence of moves from the starting position to that position. Which position requires the most moves to reach?
8
votes
2answers
441 views

From a full board to a pawn endgame in the shortest possible number of half-moves

Is any game known where all the pieces (except the pawns) are still on the board, and where a piece (not a pawn!) is captured at each half-move, leading to a pawn endgame? In other words, is there a ...
7
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3answers
1k views

Longest forced sequence that ends with checkmate and every move is a check

What is the longest move sequence that ends with checkmate and every move is a check by both players?
7
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2answers
1k 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 ...
7
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2answers
886 views

Longest possible FEN

What is the longest possible FEN? The reason for that question is, that I am designing a PGN viewer (again), and I have noticed that the FEN is dependent on the width of the board (the FEN test area ...
7
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2answers
533 views

Is there a record for threefold repetition for when the claimed positions are the farthest apart, in terms of moves?

That’s one long question, so let’s break it down. Threefold repetition, as many know, is when a draw occurs, after the same position, with all piece types on the same square, all possible moves and ...
6
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4answers
9k views

What endgame, with 3 to 6 pieces, has the longest known forced checkmate?

I am wondering, what endgame, with 3 to 6 pieces, has the longest checkmate with optimal play? Right now, the longest I'm aware of is the two knights versus one pawn endgame, which in certain ...
6
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3answers
263 views

Maximum number of non-pawn pieces on the board

In a reachable game, what is the maximum sum of queens, rooks, bishops, knights, and kings on the board? For queens only, see Maximum number of queens possible
6
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1answer
362 views

What is the longest professional chess game that ended in a checkmate?

Quite simply, what is the longest professional chess game that ended in a checkmate?
6
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2answers
519 views

What is the longest possible sequence of double checks?

The record for the most mutual checks in a legal position is known. But what is the record for double checks? There is one rule-threefold repetition applies. Four criteria exist-promoted pieces ...
6
votes
3answers
153 views

32 pieces protected once: How many moves?

From the orthodox starting position, how many moves will you need to have the 32 pieces protected exactly once? (The answer is astonishingly low.)
5
votes
3answers
332 views

Maximum number of ways to get out of check

What is the maximum number of legal moves in a legal position, given that the player is in check? It's easy to see that 43 is an upper bound. Let's suppose the white K is in check along a diagonal by ...
5
votes
2answers
265 views

Challenge: Create the longest set of moves where the game is able to be perfectly reproduced from only the current board state and move number

The challenge is to create the longest list of half moves whereby an AI could re-create that list of moves perfectly, only given the ending board state and the number of moves. As example I will first ...
5
votes
1answer
440 views

What is the maximum number of promoted pawns ever achieved in a competitive game?

In theory, a player could advance all eight of their pawns to the end of the board, promoting them all. In my own experience, games with more than two promotions on one side have been vanishingly rare,...
5
votes
1answer
280 views

Shortest sequence of moves to create biggest material imbalance

What is the shortest game with the largest material imbalance? This of course means that one side will have 9 queens, 2 rooks, 2 bishops, 2 knights, and a king, and a bare king on the other side. From ...
5
votes
1answer
297 views

Record for most stalemates in one?

Is there a known record for the most possible stalemates in one in a legal position, for with and without promoted pieces? I have gotten some results out of my own work. For without promoted pieces, ...
4
votes
1answer
2k views

Longest number of moves that have been identical in two independently played games on record

Are there any recorded examples of two chess games that were identical till the end? If the answer is no (which is most likely the case), what is the longest number of moves that have been identical ...
4
votes
2answers
391 views

Longest period with each piece “hanging”

What is the longest period in a real game with a position in which all pieces were "hanging"? The game can also be rapid, blitz or blindfold, but both players should have at least a 2000 ELO....
4
votes
1answer
163 views

Shortest game controlling a single square 16 times?

Does someone know the shortest orthodox chess game such that a single square is directly controlled 16 times? After 1. Nf3 for instance, the square d2 is controlled 5 times. And 2. ... Qa5 pushes the ...
3
votes
2answers
530 views

Longest way to mate with 1 queen against 4 queens

What is the longest way to checkmate with 1 queen against 4 queens, with no other pieces on the board? Since there are 13 moves long games with a queen vs two queens, I conjecture this should be ...
3
votes
1answer
264 views

Maximum number of captures in a position

I was wondering what is the maximum number of captures in a position, either in a real game or a puzzle
3
votes
3answers
274 views

What is the quickest way to reach a mutual, symmetrical stalemate?

What is the fastest known game that ends that in a mutual stalemate position that is symmetrical?
3
votes
1answer
295 views

Longest sequence of moves by one player with the same piece?

I suspect the following game in the European Club Champioship between David Howell and Pentala Harikrishna set a number of records. [title "Howell, David W L vs Harikrishna, Pentala"] [fen ""] 1. e4 ...
3
votes
1answer
235 views

What is the highest number of possible forced checkmates in a legal position?

Not a duplicate of, but inspired by: A position in which checkmate is forced (obligatory) What are the legal positions that have the most possible forced checkmates for one side, and for both sides?
3
votes
1answer
407 views

Longest DTM in the endgame KQPPKQ

What is the longest DTM in the endgame queen and two pawns versus a queen (KQPPKQ? This position is a mate in 167 moves. [FEN "8/k7/6K1/1Q6/8/P6q/7P/8 w - - 0 1"] Are the DTC and/or DTZ ...
3
votes
1answer
75 views

How many matches have there been at the top level which have ended up with a tied score and a winner?

In the current FIDE Grand Prix tournament in Jerusalem the first round match between Pentala Harikrishna and Sergey Karjakin ended in a tied score, 4.5-4.5, but Karjakin won because the last game was ...
3
votes
2answers
536 views

What is the longest current tablebase mate with a unique optimal line?

Having been inspired by an article on ChessBase.com, what is the longest current tablebase mate with a unique optimal line? By unique, I mean for each of the winning side's plies, there is only one ...
2
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3answers
298 views

Is this the quickest way to clearing the board to two kings? [duplicate]

Is 21 moves the least needed to get board down to 2 kings? [FEN ""] 1. e4 d5 exd5 Qxd5 Qh5 Qxa2 Qxh7 Qxa1 Qxh8 Qxb1 Qxg8 Qxb2 Qxg7 Qxc2 Qxf8 Kd7 Qxf7 Qxc1 Ke2 Qxd2 Kf3 Qxf2 Ke4 Qxf1 Qxe7 Kc6 Qxc7 ...
2
votes
2answers
193 views

What rearrangent of the starting position's pieces, in any manner, has the fastest stalemate?

It is well known that the fastest stalemate is in 19 ply. But what is the fastest possible if all pieces, not pawns, may be shuffled at will on their first ranks? This will be difficult since there is ...
2
votes
3answers
275 views

What are the fastest vertical checkmates for both castlings?

Vertical: wherein the rook attacks down a file. I wish to know the fastest possible castling checkmates, for both queenside and kingside, that are a vertical one. See my question about horizontal ...
2
votes
1answer
113 views

The quickest selfmate in 1

How quickly can a legal game reach a position where one side must give checkmate? This is in effect Evergalo's reading (see his (now deleted) answer) of Rewan Demontay's Question 33154; that question ...
2
votes
1answer
246 views

What is the longest tablebase win that includes draw rules?

It has been asked the longest mate that includes draw rules is, and it is known what the longest tablebase mate is. However, what is the longest tablebase mate, i.e. 7 pieces or less, that accounts ...
2
votes
1answer
142 views

What is the longest wait before a draw offer is accepted?

If I understand correctly, once player A makes a draw offer, the opponent player B retains the right to accept the draw offer as long as player B does not rejected it verbally, or touch a piece with ...