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Questions tagged [engines]

An engine is any machine or computer program that plays chess.

12
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5answers
6k 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 ...
10
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3answers
189 views

Human-like engine for endgame training

I am doing endgame training with LucasChess (LC), but the problem is not really related to LC, but to chess engines in general. I have this problem: See picture. When I move Kh6 in this position, ...
6
votes
2answers
180 views

Is there an engine which can give a breakdown of its evaluations

Engines evaluate a position based on a number of factors - material imbalance, king safety, control of the center, pawn structure etc. My understanding is that they then combine these separate ...
0
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0answers
29 views

How to arrange a game between chess engines? [duplicate]

How to arrange a game between chess engines? For example Stockfish vs Komodo. OS Linux.
5
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2answers
108 views

How do opening books in engine chess work?

I thought opening books were just big compilations of opening moves that engines have access to, and they choose at random which move to play from the list of moves that the opening book says is good. ...
-4
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3answers
163 views

What are unsolved problems in chess? [closed]

What I want to know is: are there any problems in chess that remain unsolved?
2
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2answers
82 views

Where is the neural network used in MCTS?

Where does an engine (such as AlphaZero) use its neural network in MCTS? It shouldn't be needed to evaluate positions reached via MCTS, since I'm under the impression that only terminal game states ...
11
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2answers
248 views

Why does NN + MCTS & AB + handwritten eval dominate engine chess?

As I understand it engines can be divided into four groups right now: those that use Alpha-beta (AB) + those that use Monte Carlo Tree Search (MCTS) for search, and those that use handwritten ...
2
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2answers
119 views

Most complicated mode for chess engines

I have used many chess engines, especially Stockfish and I want to ask you, if it possible to change its mode to the most complicated one. What I mean: Now, most engines work as following: 1) Mate ...
7
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4answers
1k views

What does it mean when engine position scores change when following the “best” move

I'm particularly thinking of Stockfish here, since that is the one I use most, but it seems to happen with other engines. Sometimes you have a position and the recommended move for white might be +1....
6
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2answers
288 views

Is there a reason AlphaZero hasn't been allowed to learn for longer?

Why don't the developers of AlphaZero let it learn for days, or even months on end? Wouldn't its neural network become much stronger, at the cost of just occupying some computational resources for a ...
3
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2answers
181 views

Can anyone recommend a Chess platform that, well, you better read further

I thought I might take a minute to share a project I started about 20 years ago. Essentially, I used my ChessMaster program to make a "Chess Explorer". In 1998, I noticed I could add notes into ...
1
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1answer
103 views

Why might this supervised engine make mistakes based on an example game?

I am developing in my free time a python-based supervised chess engine. It is trained on past games to detect who wins (only games without draw), then it proceeds as follows: 1) find the top 4 moves ...
10
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2answers
3k views

What was the first chess engine that could beat the world champion on a standard desktop?

What was the first chess engine that could beat the world chess champion when running on a standard desktop playing at standard speeds (i.e. not blitz chess)? For concreteness, say a $1000 PC.
3
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1answer
139 views

How does Stockfish ensure an incremental change made is beneficial?

Does Stockfish's testing framework get the new engine to play the old engine many times in a match? Since Stockfish thinks on each move according to a time limit (and not a depth limit, which gives a ...
23
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6answers
20k views

How to install stockfish on ubuntu?

Is there an easy guide how to install stockfish on ubuntu? From the main site I can not find any information and github repository does not provide many details. I would really appreciate if someone ...
3
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1answer
56 views

CLI tool to let chess engines play each other [duplicate]

I'm looking for a command-line tool to let two chess engines play a game or a tournament against each other. The tool should support UCI and/or the xboard protocol and it should allow to save the game ...
9
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6answers
385 views

Is it possible for a move to be recomended by engines but rejected by professional human players?

Am wondering if it is possible for a move to be considered "good" by engines but is rejected by professional human players. One possible reason that I can think of is that the in order for this move ...
5
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2answers
621 views

Alpha Zero vs Lc0 - time for self-play

Alpha Zero defeated Stockfish after only 9 hours of self-play. On the other hand, Lc0, has been training for several months and while attaining impressive strength (to say the least...) it's still not ...
8
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3answers
3k views

Why are Leela's fans so passionate? [closed]

The neural-network engine Leela is a relatively new one. It's also got some extremely passionate fans. For example they write things like this: Wait 5-6 months, and we will see SF8 on uber-duper ...
6
votes
1answer
202 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 ...
0
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1answer
190 views

Why can't I use my stockfish engine with python chess? [closed]

I'm using python chess and I'm trying to use my stockfish 10 engine downloaded from the stockfish website. import chess.uci engine = chess.uci.popen_engine(r"stockfish-10-linux/Linux/...
8
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2answers
431 views

Three Pawns for a Knight - Why Doesn't Stockfish Like it?

In a recent game I swapped off a knight for 3 pawns: [Event "County Match"] [Site "Deepest Darkest Southern England"] [Date "2018.01.20"] [White "English Player"] [Black "Ian Bush"] [Result "0-1"] [...
3
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3answers
186 views

Why does AlphaZero evaluate on the order of 1000 times less moves than Stockfish?

According to Deep mind's article, Alpha Zero searches roughly 10,000 moves per decision, while Stockfish is around 10,000,000 moves. I'm aware that Alpha Zero uses Monte Carlo Tree Search while ...
1
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4answers
150 views

Can GMs use computers to beat their opponents?

For example, suppose it's game 12 of the Carlsen-Caruana match last year. Caruana has white, and he wants to win before the tiebreaks. Now if instead of Caruana playing white, Stockfish were playing, ...
7
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1answer
107 views

AlphaZero’s search procedure

I am aware of related questions and great answers on the same topic such as Understanding AlphaZero. My questions are related to the following figure on AlphaZero's search procedure This figure ...
0
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2answers
66 views

Regarding Chessbase softwares

I have bought Houdini 6 pro ( chessbase version ), for the primary purpose of practising by playing games against Houdini 6 pro (and other engines I own) I cannot figure out how to play a game against ...
1
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1answer
225 views

Looking for a Python chess engine

I am looking for a Python chess engine package. It must be fully contained in Python, I don't want to download separate files for the engine itself and link them up somehow. All I want it to be able ...
4
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2answers
2k views

Adjusting parameters in the engine stockfish 6

I downloaded Stockfish 6 (a binary file for Windows). It works, but I miss two things: The depth seems to be rather low. How can I increase the selectivity? How can I achieve that the engine uses the ...
4
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1answer
184 views

Am I actually playing against a 1425 rated player?

I am using Deep Shredder 13 and somewhat struggled with the engine at 1400. I then managed to defeat 1425 with great ease. The game went as follows [FEN ""] 1. d4 e6 2. Bf4 Nf6 ...
4
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2answers
254 views

Do engines remember previous analysis?

Suppose I let the engine analyze a given position (let's say for simplicity the starting position), and then I execute the move suggested by the engine (let's say 1. e4). Then I let the engine analyze ...
1
vote
1answer
76 views

Node Cap for Stockfish [closed]

I discovered something quite unusual when working with stockfish 10 chess engine in arena. The discovery leads me to ask: Why does Stockfish_10_x64 have a Node Cap when searching moves based upon ...
3
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2answers
168 views

Analyzing using Chess Engines - Giuoco Piano/Steinitz Variation

[FEN ""] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. bxc3 d5 10. Ba3 dxc4 11. Re1 Be6 12. Rxe4 Qd5 13. Re3 O-O-O 14. Ne5 Nxe5 15. Rxe5 Qxe5 16. dxe5 ...
4
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5answers
567 views

Why different openings are used by computer players?

If few best computer players would be playing against themselves, chances of white winning would depend on the opening used. That way after simulating thousands of games the best opening would be ...
3
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3answers
2k views

What is the Elo rating of Stockfish version that played AlphaZero?

AlphaZero has defeated Stockfish with all novelties and brilliant strategic sacrifices. But some people were disputing its win, because Stockfish was running on weak hardware (1 GB RAM), not access to ...
1
vote
3answers
513 views

The games AlphaZero lost

AlphaZero lost 6 games to Stockfish in a 1000-game match from the starting position, at least one of which was with the white pieces: A game A0 lost with white. For some reason, these games haven't ...
6
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3answers
610 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 ...
1
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1answer
84 views

How is MultiPV enabled in general?

I looked at the "Description of the universal chess interface (UCI)" dated April 2006, and did not find a command or option that seemed to address how a GUI might enable MultiPV (I assume that PV ...
3
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1answer
114 views

Guidance on a new idea for an engine design?

for my A-level computing project I was going to do an investigation into a type of engine design which incorporates Neural Networks that I haven't seen elsewhere; as part of this project I need to ...
2
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1answer
183 views

Is AlphaZero deterministic?

AlphaZero searches for moves using Monte Carlo Tree Search (MCTS). As I understand MCTS, it takes the root position, goes to a child node, and then plays random moves until one side wins. Since the ...
6
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6answers
1k 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 ...
2
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1answer
114 views

Python Engines to Beat to Take the Crown

Since Python is extremely slow, chess engines are almost never written using it. I've been building a Python engine to avoid this issue (through JIT compilation), and want to compare my engine ...
3
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5answers
413 views

Custom Chess (game) engine

Is there a chess engine which you can use regardless of the game's rules? For example I wanna create my own chess version in which queen will also be able to move as knight or just a 10x10-square ...
0
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2answers
100 views

Testing an engine (UCI) against an older version of itself

I am making modifications to a chess engine. I want to get quick feedback on whether the modified version seems stronger than an unmodified version or not, by fighting the older version multiple ...
1
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5answers
3k views

How do I check if a move is legal using Stockfish?

Let us say that I input a wrong move in Stockfish. What answer will Stockfish send me back? Or is there a function to check if a move is bad? People, I found a solution by myself.
0
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1answer
65 views

Open source engine that doesn't lose on time

I'm looking for an open source engine (doesn't have to be very strong) that can be loaded with python chess uci module and can play at very fast time controls (few seconds plus tens of milliseconds of ...
2
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1answer
220 views

Human–machine stronger than machine?

It seems to be pretty well established since the days of (the second) Deep Blue vs. Kasparov match that top machines can beat top humans at playing chess. However, Kasparov seems to claim that the ...
3
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1answer
53 views

Are there any engines that present evaluations based on probability of finding moves?

All engines I'm aware of focus on finding the best moves to win the position. I'm curious whether there are any that exist that attempt to present an honest evaluation of a position, with human ...
5
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3answers
2k views

What is the optimal way to use Stockfish programmatically?

I have Stockfish compiled on my machine. Instead of just running the Stockfish program in the terminal, is it possible to interact with it in a separate program? For example, some basic things I ...
5
votes
1answer
776 views

Oscillating Stockfish Evaluation on Laptop

I'm using stockfish-9-bmi2 on my laptop to provide me move by move evaluation of games. I've set Stockfish to evaluate to depth = 25 plys. I find that the evaluation provided oscillates move-on-move ...