Questions tagged [computer-chess]

This tag refers to chess games played by computers. If you want to ask a question about those games, use this tag. Otherwise, use the tag [engines].

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34 votes
4 answers
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Is Stockfish 11 (level 20) beatable?

I have heard many people saying, “Hah! I beat Stockfish,” and one saying, “I am the best chess player ever! I beat Stockfish.” So I wonder if it is possible, just to know whether I should try to beat ...
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32 votes
2 answers
3k views

How computers have changed the way humans play chess

A few years ago Vishy Anand mentioned in an interview that computers had changed the way humans play chess. Obviously computers help a lot in opening preparation, but what other concrete examples are ...
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30 votes
7 answers
19k views

Hardware used in AlphaZero vs Stockfish match

I understand that AlphaZero has to use a different kind of hardware than regular Stockfish. I would expect that the hardware has a large effect on engine strength. That's why I wonder whether there ...
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  • 20.3k
25 votes
1 answer
2k views

Is computer chess exhibiting the predicted "draw death"?

At various times, even going back 100 years or more, people have been predicting the "draw death" of chess meaning that top players will get so good that every game will be a draw. In the 1984 World ...
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23 votes
4 answers
11k views

Creating chess engine, machine learning vs. traditional engine?

I am both an avid chess player and computer programmer. I would say that playing chess and programming are the two things I spend the most time doing. Naturally, I am wanting to create my own engine ...
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23 votes
3 answers
4k views

When moves are randomized, is there an inherent advantage to the player who goes first, or the player who goes second?

Imagine we are pitting two automated players (bots) against each other, but instead of thoughtful moves made by the players, they make completely random choices. I realize that this is not really the ...
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  • 356
23 votes
5 answers
5k views

Is it possible that a radically different but equally effective playstyle exists?

There seems to be an established "chess canon", whereby general principles exist for long term strategy in the game. There is a well-characterized set of openings, a small subset of which are even ...
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  • 339
22 votes
3 answers
5k views

Why is Leela so good at beating Stockfish in the French/Slav?

I notice Lc0 is especially good against Stockfish in French / Slav pawn structures. However, I don't understand why. Here're a couple of games where Leela smoothly outplays Stockfish. Can anyone ...
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21 votes
3 answers
11k views

Will quantum computers solve chess?

The theory is that there are more that 10^40 positions, and a computer that works with an atomic scale has to be impossibly large(As in galaxy-scale large), and well beyond our current level of ...
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  • 3,315
19 votes
5 answers
4k views

How useful is a 40-year-old chess book?

I have a chess book which I find great in terms of tone, formatting, etc., but the computer does not agree with some variations I gave it. How much has chess changed since 1977? I imagine the rise of ...
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  • 1,168
18 votes
5 answers
2k views

How did the engines improve since Deep Blue?

Computer chess engines have gotten better since Deep Blue beat Kasparov in 1997. Did the algorithms get better, or were the improvements mostly due to the same algorithms running faster thanks to ...
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  • 410
17 votes
6 answers
4k views

Carlsen-Caruana Game 12

Any online search about the recent game 12 in Carlsen-Caruana's WCC is filled with the surprise caused by Carlsen offering a draw when in a (possibly?) winning position. It was announced on chess.com ...
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15 votes
3 answers
2k views

Alternative approaches to chess engine programming

As far as I understand, roughly speaking, chess engines work by: calculating all possible variations (game tree) up to some depth evaluating the final position based on some criteria (material, piece ...
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14 votes
2 answers
2k views

Have engines refuted any established openings?

Before engines were introduced to chess in late 20th centry, there were many established openings that were played by the top players at that time. I am wondering if any of those openings were refuted ...
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11 votes
3 answers
2k views

How to play computer from a particular position on chess.com app

I started playing chess a month ago and sometimes I would like to play a hard computer from a particular position (e.g., practicing not blundering in openings, or practice winning a won endgame ...
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11 votes
5 answers
2k views

Is the dead position problem solvable?

In chess, there are some dead positions (FIDE Laws of Chess). 5.2.2 The game is drawn when a position has arisen in which neither player can checkmate the opponent’s king with any series of legal ...
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10 votes
5 answers
17k 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 ...
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  • 731
10 votes
3 answers
1k views

Why are world-class engines playing like this?

I was reading about the Lc0 engine and its evolution. Then took a glimpse at the games between Lc0 and the notorious Stockfish. I am not a professional or anything remotely close, but this particular ...
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  • 465
9 votes
10 answers
8k views

Is a Finite State Machine a good way to model chess?

A very common model in programming is the Finite State Machine (FSM) (see here for a great worked example.) Is a FSM a good way to model chess? What are the best ways to go about it? What chess ...
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  • 6,690
9 votes
3 answers
2k views

Knowing that AlphaZero beat Stockfish 8 (28 wins, 0 losses, and 72 draws), what would AlphaZero's rating be?

I found three different questions here on SEC that asked what Stockfish 8's rating was for the match against AlphaZero, but none that asked what AlphaZero's rating should have been after (if it had ...
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  • 31.9k
8 votes
2 answers
2k views

Is it normal for a chess engine to blunder material if its evaluation is only based on naive material evaluation?

For the past couple of weeks, I've been making a chess engine, and right now I'm working on creating its search and evaluation phases. To start off with, I made the evaluation phase a simple count of ...
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8 votes
4 answers
942 views

Computers finding computer moves

There are positions in chess where the only good move (e.g. only move that preserves equality) is very unnatural for a human player. For instance if this move goes against common principles or if it ...
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  • 20.3k
7 votes
2 answers
3k views

What happens if a strong chess engine plays with itself many times?

If a strong engine (eg. Stockfish) plays with itself many times (say, 100 times), what will be the outcomes in terms of the following: What will be the proportion of draws? Will there be wins/losses? ...
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7 votes
4 answers
1k views

How do top players move so fast?

I've seen 3 minute and 1 minute matches on Chess.com where the players move at insane speeds during the last few remaining seconds of the match. I'm talking in milliseconds, I'd at least take that ...
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7 votes
2 answers
1k views

What was the source of randomness in the Alpha Zero vs Stockfish match?

My understanding is that Alpha Zero's algorithm was fixed after the "learning" phase, so would it come up with the same move for every position? Was the variability in the match entirely due to a ...
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  • 5,454
7 votes
1 answer
352 views

How do computers end up blundering?

I’m trying some practice games against Stockfish level eight. I always lose but sometimes Stockfish makes obviously bad moves and I get ahead. Here for example, Stockfish makes an inaccuracy followed ...
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  • 79
7 votes
1 answer
391 views

How often do hash collisions occur in modern chess engines?

This is a question I am asking for a chess engine I am attempting to create. I have read that engines like Stockfish can look at around 100 million positions per second on a good computer. The code on ...
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7 votes
2 answers
2k views

Alpha Zero vs Stockfish, French Defence, is this move for Black better?

I'm referring to the French Defense (C11 ECO code) game where Alpha Zero played 30. Bxg6 ! , sacrificing a bishop for a better position. After Alpha Zero's move 30. , I couldn't find any good moves ...
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6 votes
1 answer
3k views

Is Deep Blue outdated?

I bought a laptop, a Dell, model XPS 13. I found a technical review which mentioned the Fritz test: Fritz is a chess benchmark that tests the computing capabilities of the CPU with various chess ...
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6 votes
2 answers
835 views

Engine that likes to draw

Is there a world-class chess engine that can be configured so that it equally likes to draw and win? I imagine the engine would really like making exchanges, for example. What would happen if you ...
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  • 161
6 votes
6 answers
1k views

Can you objectively determine who was the best chess player of all time?

There have been a number of statistical attempts (e.g., chessmetrics and edo) or computerized attempts to determine who was the best chess player of all time. The statistical approaches attempt to ...
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  • 937
6 votes
2 answers
921 views

Question about the move h5

I recently played a chess game whose link is: https://lichess.org/pCFw1h2w/black#5 After running a computer analysis, I found that in this position: I know that even though Stockfish does not tell ...
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  • 2,227
6 votes
1 answer
2k views

Implementing Late Move Reduction (LMR) inside iterative deepening

Here I am trying to improve my engine, and the next feature on the list is LMR. I understood the general ideia, but since I don't want to introduce bugs and the CPW on the subject has no code, how do ...
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  • 415
6 votes
2 answers
929 views

Human and computer vs computer alone

How much stronger are human/computer teams vs. computers alone? My understanding is that that advantage is enough to be decisive, especially in correspondence play, but just how large is it?
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  • 161
6 votes
1 answer
733 views

How is Stockfish so fast?

I'm currently developing a bitboard-based chess engine for fun and can generate around 5.5 million positions per second on perft tests. I ran the same tests on Stockfish, which can do around 130 ...
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  • 121
6 votes
0 answers
202 views

Are there any dicylic graphing programs for chess? [closed]

Although chess is frequently thought of as a tree structure, it is not because positions can be arrived at through different move orders and moves can be repeated. Are their graphing programs/...
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  • 937
5 votes
2 answers
260 views

What makes a move “weird”?

I am not sure if this question has been asked before, but I recently had a friend, who is a NM, play a blitz match against stockfish (level 12 I believe) and commentate its playing style. What struck ...
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  • 161
5 votes
1 answer
732 views

Did Deep Blue play like a human?

Kasparov said, in Game Over: Kasparov and the Machine, that Deep Blue "sank into deep thinking" and took like 15 minutes to make a move. The movie tells the story of their match, in 1997. At a ...
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  • 161
5 votes
1 answer
311 views

Obtain information about a a position from Stockfish

I want to know from Stockfish: All possible moves in a position, a.k.a. a depth 1 analysis with no score. If the king is in check, is checkmated, or if there is a draw. The current FEN string, after ...
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  • 301
5 votes
3 answers
1k views

Do top chess grandmasters have significant drawing chances against top engines?

the likes of stockfish and komodo are much stronger than humans. The 3300 plus ratings of these engines suggests that even the top humans would find it impossible to draw even 1 game, but is this ...
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  • 4,897
4 votes
4 answers
14k views

Is Magnus Carlsen ever going to play against Stockfish in a event?

I was wondering if the actual champion is ever going to play against a chess engine like Kasparov and Krammik did? Or is this kind of event not going to happen anymore due to the strength of the ...
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  • 97
4 votes
2 answers
2k views

Why didn't the Black rook capture the White bishop?

I am a total newbie in chess. I was playing with an ~intermidiate computer~ as White and made a pretty stupid mistake by playing Bf4. I waved the bishop goodbye, yet Black's rook did not capture it. ...
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4 votes
6 answers
2k views

Can a human defeat an engine in a 10-game match if he is given the White pieces and draw odds in every game?

What would happen in a 10-game match between one of the strongest human player (Carlsen, Caruana, Aronian, Kramnik or Anand) and one of the strongest engine (Komodo, Stockfish or Houdini), but with ...
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  • 4,439
4 votes
1 answer
2k views

Polyglot Opening Books vs. Chess Opening Tree

Depending on the GUI, I have noticed some use polyglot files for their opening books and others use .ctg(chess opening tree) for their opening books. Is there an advantage or disadvantage to either ...
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  • 660
4 votes
1 answer
300 views

What should the practical meaning of "blunder" be? [closed]

There have been questions about the reliability of computer evaluation, and famous cases in which computers miss-evaluate positions have been given. What I want to ask is more related to the practical ...
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  • 1,244
4 votes
1 answer
766 views

Problems with computing the Zobrist hash for a chess position?

I'm attempting to use Zobrist hashing in my chess engine, but I'm running into some difficulties getting it to work correctly. I'm using the random numbers from this site so I can test my results ...
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4 votes
3 answers
2k views

Validate Engine moves using Perft and divide

I'm developing a small Engine in Java, before trying something more elaborate in C/C++. Right now I'm running some perft tests (the 'perf_talkchess' file), but as expected it has some bugs. Consider ...
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  • 415
4 votes
1 answer
136 views

Lichess stats for average centipawn loss

I am not able to understand the meaning of this stats on Lichess. How can I analyze that and work on my weaker points. Does it mean I make bad Queen moves?
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4 votes
3 answers
423 views

Did Leela Zero miss a win in this position?

Did Leela Zero miss a win in this position from game 106 of the Computer Chess Championship, on move 83 with White to move? [FEN "8/2p1r3/2P4k/1P1pB2p/K2NbP1R/P5r1/8/8 w - - 0 1"] Here, ...
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  • 259
4 votes
2 answers
221 views

How many games to get a good idea of computer chess board rating?

I have an old Radio Shack 1850 Electronic Chess Computer, which I would like to know the ELO rating each level plays at. The instructions just give average number of seconds per move. I figure I ...
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