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40 votes
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How are humans good at chess?

Herbert Simon touched on this question. He received the Turing Award in 1975 and the Nobel Prize in Economics in 1978. His primary research interest was decision-making and is best known for the ...
Kortchnoi's user avatar
  • 3,525
31 votes
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Why do high rated players still take so much time to calculate a pawn endgame position close to a game that they (likely) had before?

But I thought at that level this position must have already occurred, or, more likely, be somewhat close enough to a previous one, that the players would play in a more automatic fashion. Not true. ...
NoseKnowsAll's user avatar
  • 5,803
29 votes

How are humans good at chess?

Let's take a conversation. The number of sentences that could be said are infinite. The number of grammatically correct is still infinte, as is the number of logically/conversationally correct would ...
Mike Jones's user avatar
  • 5,170
25 votes

How are humans good at chess?

Humans try to understand a game like this, to formulate rules, try to recognize patterns of what worked in one position and apply them in positions they consider similar. And it turns out that that ...
RemcoGerlich's user avatar
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18 votes

What is the average number of legal moves per turn?

Whilst acknowledging the comment by @SmallChess that this is pointless, it is also relatively straightforward to do. I analysed 2,539,871 games from a ChessBase mega database counting the number of ...
kentdjb's user avatar
  • 1,806
18 votes

Why do high rated players still take so much time to calculate a pawn endgame position close to a game that they (likely) had before?

But I thought at that level this position must have already occurred, or, more likely, be somewhat close enough to a previous one, that the players would play in a more automatic fashion. Playing in ...
Brian Towers's user avatar
  • 98.6k
9 votes

Why do high rated players still take so much time to calculate a pawn endgame position close to a game that they (likely) had before?

As others have mentioned, endgames in general are quite dependent on the specifics. It's true at some level that to grandmasters every endgame is "somewhat close enough to a previous one", ...
fish's user avatar
  • 273
8 votes
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What is the average number of legal moves per turn?

What you are looking for is called the branching factor, and I've always seen the number 35 mentioned, but I don't know what the original source is. I guess someone estimated it some 50 years ago by ...
itub's user avatar
  • 10.6k
7 votes

Is it possible to fully analyse, at least some openings of chess?

The moment we knew that a variation would be winning for either White or Black, the other side would never go for that variation. E.g. after 1. g4 e5, White will never play 2. f3 because we know that ...
Glorfindel's user avatar
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7 votes

What is the average number of legal moves per turn?

The variability in number of legal moves is about the same for black & white... except for that odd little bump for white on move 7. This phenomenon demands further research!
Marc's user avatar
  • 171
7 votes

Why do high rated players still take so much time to calculate a pawn endgame position close to a game that they (likely) had before?

I cannot speak for the greatest, but it is probably still easier to calculate these positions than it is to memorize them; effectively selecting candidate moves is a learned skill, and subtle ...
Andrew Chin's user avatar
6 votes

How are humans good at chess?

Interesting Chess Given a board configuration, many expert chess players are able to reproduce the moves which produce that configuration. However, of the 10^40+ board positions, grandmasters would ...
Lawnmower Man's user avatar
5 votes

How are humans good at chess?

At one level, the answer is that we don't know how the human brain works. But something a bit more helpful: The algorithm used by Stockfish (and other chess engines before the rise of deep neural ...
IceGlasses's user avatar
5 votes

How are humans good at chess?

"Intuition" is basically just pattern matching. We use our experience from past situations/chess positions that are familiar, in order to gain a "feel" of a current position. With this intuition, we ...
Inertial Ignorance's user avatar
4 votes

How are humans good at chess?

Good question, I've been curious about that myself. Humans have an extra plane to their reasoning. The first evaluation is that of strategical themes applicable to the position, and the next one is a ...
postoronnim's user avatar
  • 1,034
4 votes

How are humans good at chess?

Making plans (Pattern matching has been mentioned. Humans are good at it) In addition we make plans. For example, looking at a position we see that the opponent's king and queen is in a good ...
Stig Hemmer's user avatar
3 votes

Can 5D chess be solved?

This link explores a way that white can force a draw. Perhaps this is game-breaking and makes the solution process much easier. I am only an casual chess player and I’m mainly transcribing “5D Lexi”’s ...
Benjamin Wang's user avatar
3 votes

How are humans good at chess?

I am a very bad amateur chess player, but one thing I notice is that people are able to prove (in the mathematical sense) many things about a position, and grandmaster has a much more developed ...
lvella's user avatar
  • 161
3 votes

How are humans good at chess?

Spotting more complex or different types of patterns Computers don't have a particularly easy time identifying the same patterns that humans can easily spot. This is especially noticeable in something ...
NotThatGuy's user avatar
3 votes
Accepted

ECO D35 for Game Analysis,- Queen's Gambit Declined: Queen's Knight Variation, 3...Nf6 game for analysis

My move by move analysis see below. Comments appear below the board as you play through the game. Generally a blunder rich game. White seems to like pushing pawns a bit too much, while black played ...
user1583209's user avatar
  • 20.8k
3 votes

Is it possible to fully analyse, at least some openings of chess?

There are algorithms/chess engines that can heuristically evaluate a position and provide a score which can be proxied for who is winning. Completely analyzing an opening would require an engine to ...
Jubin Chheda's user avatar
3 votes
Accepted

More accurate estimate of chess games possible

Peruse this link. Also see link for possible duplicate. Sum-up of first link: Longest game under FIDE rules: 8848.5 (Fabel) Maximum mobility number: 218 moves Shannon's number, assuming 40 (full) ...
Hauke Reddmann's user avatar
2 votes

Why is Chinese chess (xiangqi) harder for computers than international chess?

Xiangqi is very tactical, not positional, doesn't have chains or pawns for a long time. The difficulty to computers is the many positions available to the pieces, and the board is 10 x 10. I think ...
Manuel's user avatar
  • 21
2 votes

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

Old question, but for people who just want a quick estimate they can do with basic math this is an easy way to go about it If we consider all 32 pieces, we can rearrange them P(64,32) or 64 permute 32 ...
Colin Hicks's user avatar
2 votes

What would a playable chess variant with a complexity comparable to Go look like?

Actually it is not really correct to say that "simply increasing the board size [...] comes at the cost of losing playability". The complexity of Go on a board of the same size as chess (i.e. 8×8) ...
user21820's user avatar
  • 2,816
2 votes

How are humans good at chess?

As far as chess is concerned many people before me have given brilliant answers. But, additionally I would like to point out that many chess players employ, apart from theorems they have learnt ...
Pi_die_die's user avatar
2 votes

How are humans good at chess?

@Kortchnoi's answer is very insightful and worth a read. It's also worth noting that a game between two perfect chess AI engines must always, in theory, end in a stalemate due to the min-maxing ...
Aleksandr Hovhannisyan's user avatar
2 votes

Why do high rated players still take so much time to calculate a pawn endgame position close to a game that they (likely) had before?

The difficulty arises because there are many important variations that must be calculated, which are strictly winning/losing/drawing within the margin of only one or two moves. Furthermore, though ...
Mateen Ulhaq's user avatar
  • 1,304
1 vote
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How do I evaluate the value of every piece in Mathematical Chess?

I want to evaluate every mathematical chess piece value Currently there are two chess engine models. In the first, the traditional one going back 50 years, the engine is programmed with the ...
Brian Towers's user avatar
  • 98.6k
1 vote

Can 5D chess be solved?

Very doubtful. Even just 5v5 chess without introducing the time travel element was only weakly solved in 2013 The time element adds much more complexity and would make it much harder to deal with.
pulsar512b's user avatar
  • 1,858

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