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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29
votes
3answers
5k views

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

A friend and I yesterday asked ourselves what the highest number of possible mates in a (legal) position is. We were able to come up with the following position which has a total of 76 unique mates in ...
27
votes
1answer
6k 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? ...
24
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5answers
5k 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 ...
21
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2answers
3k 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 ...
20
votes
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 ...
19
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4answers
3k 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 ...
19
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4answers
4k 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 ...
14
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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 ...
13
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8answers
15k 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 ...
13
votes
3answers
485 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 ...
13
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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?
12
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1answer
3k views

What is the longest proven forced win (including 50 & 75 move 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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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" ...
10
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5answers
2k 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
339 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?
10
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3answers
429 views

Who was the quickest from "unrated" to GM?

What player attained the GM title in the shortest amount of time, beginning from their entry into organized (rated) chess, to the award of the title (either via attaining norms, or by direct award)? ...
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
432 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 ...
9
votes
2answers
969 views

What is the maximum number of passed pawns in a position?

Something I have wondered about recently is the maximum number of passed pawns that is theoretically possible. What is the answer, and the fastest way to achieve that result?
9
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4answers
15k views

What is the longest forced win with 3 to 6 pieces (ignoring 50 & 75 move rules)?

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 ...
9
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2answers
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 ...
9
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4answers
2k 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?
9
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3answers
865 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 ...
8
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3answers
517 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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2answers
1k 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 ...
8
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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 ...
8
votes
2answers
452 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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2answers
2k views

Can there be a checkmate with maximum points of material (103) while covering 64 squares?

Is it possible to compose a game where these three conditions are simultaneously satisfied? No White piece is gone but every Black piece except the king is. All the white pawns are promoted to a ...
7
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2answers
656 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
439 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 ...
6
votes
3answers
505 views

The quickest mate in n

Obviously inspired by the analogous selfmate question. (Helpmate would also be possible in principle, but looks a bit silly.) Thus, 1.f3 e5 2.g4 allows Black a #1, and 1.f3 e5 2.h3 a #2. 1.f4 e5 2....
6
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2answers
372 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 ...
6
votes
1answer
413 views

What is the record for the 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 did some constructing myself for a start. For without promoted pieces, I ...
6
votes
3answers
339 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
votes
1answer
390 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
votes
3answers
161 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
741 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 ...
5
votes
3answers
867 views

What professional game has the quickest sequence, starting from move one, to quadrupled pawns?

In the blog "AJEDREZ, SIN DUDA", I came across a page that gives a game featuring quadrupled pawns. [Title "Zheliandinov-T. Sereteli, 35th Championship of the USSR, Kharkov, 1967"] ...
5
votes
1answer
352 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
3k 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 ...
5
votes
1answer
232 views

Is it possible to reach King vs King by moving each piece at most twice?

I'm interested in short games that reach a King vs King endgame. Sam Lloyd reached King vs King after only 17 moves. This has since been improved to 16.5 moves. (See this and that.) One can show that ...
5
votes
1answer
827 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
358 views

Maximum number of captures in a position

I was wondering what the maximum number of captures in a position is, either in a real game or a problem.
5
votes
2answers
590 views

In Crazyhouse, what is the minimum number of moves to achieve maximum material difference?

If one side captures everything and promotes all pawns (including the opponent's re-placed pawns) to a queen, it is possible to achieve 206 points of material difference 18 queens, 4 rooks/knights/4 ...
5
votes
1answer
80 views

What is the longest sequence of consecutive captures in a FIDE rated game?

What is the longest sequence of consecutive captures (including both pawn captures and piece captures) in a FIDE rated game?
5
votes
2answers
641 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 ...
5
votes
0answers
230 views

Highest depth ever achieved

I saw a guy that went into depth 70 with no search moves at 41, 192, 897, 168, and 184 nodes from the starting position on Stockfish a few years ago. I would like to know if this is still a record or ...
4
votes
4answers
1k views

What is the farthest away a game can be from a guaranteed checkmate?

What is the maximum number of moves away from checkmate that a player can be where checkmate is guaranteed? There are many positions that are a guaranteed win for a player if played perfectly, right? (...
4
votes
6answers
890 views

Both grandmaster and PhD/doctorate

Who have PhDs/doctorates that are also grandmasters? Conditions: standard GM only eg no WGM (see there for WGM version), no International Correspondence Chess Grandmaster no honourary PhDs/...
4
votes
1answer
547 views

List of female chess players by peak FIDE rating

Update: The answer currently doesn't include countries and other trivia like in the original one. Please consider posting an answer with at least the countries or editing current answer to include ...