Questions tagged [mathematics]

Questions concerning the mathematics of the game of chess, or chess-related mathematical pursuits.

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5
votes
2answers
662 views

Biggest Possible Material Advantage But Still Losing

Assuming: Queen=9, Rook=5, Bishop=3, Knight=3, Pawn=1 The below position is evaluated at +411 for White but he still loses by force (mate in 9, pawn promotes to a bishop just for the fun of it) Is ...
13
votes
3answers
473 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 ...
4
votes
2answers
6k views

How do you calculate your Tournament Performance Rating?

How do you calculate your Tournament Performance Rating? I can think about two different ways to answer my question: Do you know the formula for calculating your TPR (FIDE or USCF)? Can you link me ...
3
votes
1answer
1k views

What is the minimum number of pieces needed in a chess set to account for all possible promoted pieces?

How many pieces would be needed in a chess set where all possibilities for promoted pieces are included if pawns are no longer used after they promote?
2
votes
1answer
478 views

Estimating probability of player playing move in the opening

For position you never played, book probability is perfectly fine for me. The question starts when you already played position x-times. I'm looking for function that will update book probabilities ...
5
votes
6answers
643 views

How to determine if a position is open or closed in a “rigorous” fashion?

I am creating a set of chess positions to be used [as a data set] for a project. It's based on supervised machine learning, but I need to have labeled data (see more italicized text below) before any ...
-1
votes
2answers
182 views

False calculation of chess moves

At the start I must admit that I am not the brightest chess player, so this just might be a stupid question but: Calculated Chess moves have been determined to be infinite, as I am given to ...
5
votes
2answers
118 views

Endgames: How was “maximum moves required” determined before tablebases?

To use a simple example, tablebases show that KQ vs. K is won in at most ten moves. But chess books going back many decades, well before tablebases, say the same thing. How was this calculated?
-2
votes
2answers
87 views

How to calculate which opening move is modern

What approach would you recommend to calculate current tendency in opening position? You have set of (move+year) values from games. Amount of total games is unknown but will be somewhere between 1 ...
8
votes
1answer
303 views

Mathematical formula to get how broad opening repertoire is

programmers and mathematicians! I'm looking for some opinions how to build meaningfull formula that represents broadness of opponent's repertoire. At the moment I do it like this: I filter all ...
6
votes
1answer
589 views

Checkmating with two bishops

Let White have the two bishops. Given any setup, has the maximum number of moves to forced mate been calculated on an nxn board (for large enough n)? If not, are there any bounds on this number? Of ...
22
votes
5answers
2k views

Least number of moves to achieve a complete switchover of nonpawns in starting setup

[fen "RNBQKBNR/8/8/pppppppp/PPPPPPPP/8/8/rnbqkbnr w - - 0 1"] During a comp, my friend an I had a team kill and we decided to make this position(legally) before drawing. Then we continued to find ...
2
votes
1answer
572 views

What's the average piece density?

In a position, the piece density is equal to the total number of pieces on the board (Whites pieces + Black pieces) divided by the total number of squares (64). At the beginning of every game, the ...
3
votes
1answer
268 views

Taxicab distance for bishops

I have two questions related to defining distances in chess. On this wiki page, this subject is briefly touched, by saying that the taxicab (also called Manhattan) distance is used for rooks, which as ...
0
votes
0answers
139 views

What is the maximum number of possible moves a player can choose from? [duplicate]

Let's say you arrange a position that gives a player the maximum number of choices among possible moves. How does that position look like and how many possible moves are in that position?
3
votes
1answer
889 views

How many positions are there in n-pieces endgame tablebases for different values of n? [duplicate]

Note that I don't want the exact values, I only need approximations. And I am only interested in small values of n (not more than 12).
10
votes
3answers
510 views

Where can I find Pauls' 1874 article on the n-queens problem?

Where can I find the following article, which concerns the n-queens problem? E. Pauls, Das Maximalproblem der Damen auf dem Schachbrete, II, Deutsche Schachzeitung. Organ f¨ur das Gesammte ...
7
votes
2answers
3k views

What is the number of legal positions in a chess game?

There have been several questions regarding the possible number of chess games. for example; Database of every possible move in chess. However,can there be an estimate on the number of "allowable&...
8
votes
4answers
610 views

Does playing tournament chess help one in the field of chess-related math?

A question of personal interest. Is "visualization" of various types of boards and graphs helped along by competitive, tournament play? Of course, I'm assuming play beyond simply knowing how the ...
6
votes
3answers
2k views

How many possible combinations for the number of pieces on the board?

My question concerns the total material available on the chess board (black+white pieces). At the very beginning of a game, there are 2 Kings, 2 Queens, 4 Rooks, 4 Bishops, 4 Knights and 16 pawns. ...
4
votes
4answers
1k views

Longest path for knight

Suppose the knight is on square X and he wants to get to square Y, and in order to do that he has to move N moves. how big could N be? Could that be solved using a mathematical equation? Say Nf3 ...
13
votes
7answers
14k 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 ...
18
votes
1answer
2k views

How many such positions are there? (chess/math checkmate puzzle)

I'm interested in this kind of position: There are only 4 pieces on the board. If Whites goes first, they can checkmate in one move. If Blacks goes first, they can checkmate in one move. For example: ...

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