Questions tagged [stockfish]
Stockfish is a strong open-source chess engine.
229
questions
-3
votes
0answers
74 views
The efficiency of playing a random move in a game of chess [closed]
I would like to ask you whether you think my experiment possesses any value.
The following experiment shows the competition between two chess engines. The black side is programmed to always play a ...
3
votes
0answers
109 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
1answer
190 views
Why is Bf8 a blunder in this position?
Here is an analysis of a game I played recently in Chess.com app. I won this match in move 19 as the opponent resigned.
Please see the image attached for the position. On move 16, after the White ...
2
votes
1answer
60 views
limit stockfish 9 to a specific range of ELO rating
I am using stockfish 9 for our chess game project, and I want to limit the ELO rating of the engine to a range. I saw attributes like movetime and depth are used to limit the engine skill level, but I ...
3
votes
3answers
196 views
Stockfish depth calculations
I'm using Stockfish to analyze my blunder filled games for blunders.
Let's say you send stockfish a FEN for a position and then calculate to a given depth ...
position fen the-starting-position
go ...
2
votes
2answers
125 views
Why was the engine giving such positive evaluations for my game with equal material?
I just played a game on chess.com that was roughly equal material until the final move (I was one pawn up for most of the game) but the engine favours my position to the extent that by move 12 I had a ...
5
votes
1answer
299 views
HalfKP Structure for Stockfish / Shogi NNUE - how does it work?
Stockfish now uses a neural network for position evaluation. The structure of this neural network was introduced for Shogi by Yu Nasu in the paper dubbed "Efficiently updatable neural network - ...
3
votes
1answer
81 views
Engines tuned to masters’s styles
I saw a stream by IM Eric Rosen where he showed a stronger version of stockfish than the one on lichess.org. He said that it is a version that is given to masters with the evaluation function ...
8
votes
2answers
2k views
Why is an early e5 against a Yugoslav setup evaluated at +2.6 according to Stockfish?
I was looking at analysis on one of my games and found this variation against a Yugoslav attempt against the Sicilian Dragon which Stockfish 12 instantly says is +2.6 for white:
[FEN ""]
[...
1
vote
1answer
146 views
Why does Stockfish NNUE flatline?
Flatline - to produce a flat evaluation curve.
As I understand engine chess, engines "flatline" in fortress positions. In these positions there are a lot of effectively-equivalent positions ...
2
votes
2answers
158 views
Why does stockfish suggest bishop pins on knights early on?
Stockfish suggests the following pin for me (white) against the queen on the night. However, whenever I play this move in real games black just kicks the bishop off with pawn to h6. I end up just ...
12
votes
1answer
4k views
Did Stockfish regress from October to December 2020? If so, why?
NCM data
If the NCM data is to be believed, somewhere around October 2020, Stockfish dev hit +370 elo vs. Stockfish 7, but has since regressed to only +360. What's going on?
Only thing I can think of ...
3
votes
1answer
144 views
How to interpret lines of play computed by Stockfish during annotations
I am learning how to use Stockfish to analyze my games, and I had a question on how to understand Stockfish's output.
Consider the screenshot when I request stockfish 12 to annotate my games inside ...
4
votes
0answers
76 views
Is there a mathematical way to determine whether going to depth n+1 would be x% likely to recommend the move at depth n?
I have a chess GUI which I've recently been updating to do preemptive searches (that is, depth searches for all possible opponent moves) that I'd like to speed up, since the bot searches go to at ...
1
vote
1answer
194 views
Is there any GUI for Stockfish which allows comments in macOS Big Sur?
Currently I use the built-in Stockfish app that's in the Apple Store. But unfortunately, I can't put comments in the moves. I would really appreciate it if you can give me good recommendations other ...
2
votes
1answer
387 views
How should I configure Stockfish if I want it to play as a 2800 ELO player without the UCI_LimitStrength value?
Stockfish has so many parameters that I'm not sure which one I should change so that it has a strength equivalent to that of a human who has 2800 ELO, well that's one of my wishes, the other is to be ...
5
votes
2answers
2k views
Why doesn’t Stockfish evaluate this fortress as 0.0?
I'm going through the 100 endgames you must know book on Chessable and stumbled upon something I don't understand. This position with white to move is described as a draw starting with 1. Kh1. I ...
3
votes
1answer
127 views
The best move in this Crazyhouse position according to Stockfish
I just played my first few games of Crazyhouse, and I really don't understand it. At one point I had this position.
[Title "White to move"]
[FEN "r2q1rk1/pbb2pp1/n1p1p2p/1p1nP3/2pPN3/...
1
vote
1answer
213 views
running stockfish with docker and docker-compose
I have access to a powerful computer at work so naturally I want to run a chess engine on it (stockfish for now and later leela). I am trying to use docker-compose to link a stockfish image and a ...
2
votes
3answers
106 views
Xboard and a remote engine
I want to analyse chess games with xboard and stockfish. Locally this is no problem.
But my PC is slow, so I have rented a faster linux server, and I want let stockfish run on it.
How can I use xboard ...
7
votes
3answers
4k views
How does Stockfish know if the king is in check?
I am writing a chess engine. I need to know how to tell if the king is in check. I was thinking that maybe I can use the approach that Stockfish uses. Where and how in Stockfish's code is check ...
2
votes
0answers
179 views
How to turn off Contempt in engine analysis?
I'm trying to analyze a game with the python-chess package, and for that I want to turn off the "Analysis Contempt" option in Stockfish. However, it seems it doesn't work, and I don't know ...
3
votes
3answers
1k views
Stockfish Evaluations
I've been getting Stockfish to analyse lines of the KID, and the evaluation gives a score of around +1.5: White has a big advantage. How come this is true, when the KID is a playable(and good) opening?...
4
votes
3answers
262 views
Book recommendation for chess engine building
This might be too broad a question, but can anyone recommend specific books that deal with chess engines, including hard-coded ones such as Stockfish, Komodo, and other ones also based on neural ...
3
votes
3answers
774 views
Does Stockfish NNUE have contempt implemented?
Per title. As I understand contempt, it's a setting in the eval function that adds a bonus for material remaining on the board. This makes the engine favor positions with more material (i.e. more ...
2
votes
4answers
540 views
Lc0 vs. Stockfish
Stockfish analyses many positions per second and chooses the best line. Lc0 is a neural network that immediately ignores moves which don't work, but is slower. However, somehow Stockfish is better. ...
2
votes
1answer
523 views
Unable to run Stockfish on Python
I know this isn't a programming forum, though it's chess-related, hence the placement on here. Basically, I'm trying to setup stockfish with Python on my PC. I installed it via pip install stockfish.
...
2
votes
1answer
90 views
What's the best way to get the top n engine moves?
I want to use python-chess to get the top 5 Stockfish moves from a given position with a numerical evaluation for each move. Is it more accurate to run the engine for 10 minutes with MultiPV=5, or to ...
10
votes
2answers
2k views
Three way fork-Why take the rook instead of the queen?
I just finished off a game and decided to do some analysis because I had a position that I was thinking about for a little bit.
I ran the game through Stockfish and the move I was thinking about was ...
5
votes
1answer
1k views
What does Stockfish NNUE mean for Stockfish?
Apparently there was a major update to Stockfish recently such that it gained +50 elo (per regression tests). I'm told that the difference is coming from the new NNUE (efficiently updatable neural ...
17
votes
1answer
2k views
Stockfish is considering a move in a book by GM Mihail Marin as a blunder
In the book English opening volume 1 by Mihail Marin at this position
[fen "3nrrk1/bppq2p1/p4p1p/2Pp4/1P1P3N/P1BQ2P1/5PKP/4RR2 w - - 2 21"]
1. Qg6 (1. Ng6)
He suggests Qg6 whereas ...
2
votes
1answer
767 views
What does this paragraph about Stockfish's regression tests mean?
Source
Point 5:
Elo estimates of single patches (SPRT runs) typically come with large error bars. Take this into account when adding Elo estimates. Furthermore, Elo estimates of passing patches are ...
3
votes
2answers
160 views
Alphazero vs Stockfish
Is the particular ending really a draw? Someone may try will FinalGen , please?
[Title "White to move"]
[fen "8/1B2k3/p7/P6p/1n1p2pP/6P1/4KP2/8 w - - 0 1"]
10
votes
4answers
4k views
Why is White considered so much better in this position?
I'm not sure I understand why Stockfish considers White so much better here. A look at the two strongest lines for White by Stockfish doesn't really give me much intuition about what White is playing ...
2
votes
2answers
292 views
Which engine is better at Chess960-Stockfish or Leela?
It seems that TCEC has seen Stockfish and Leela go back and forth. It is probable that these days Stockfish is a little bit better than Leela. I was wondering, since it is different in Chess960, which ...
3
votes
3answers
279 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, ...
3
votes
2answers
186 views
Compiling Stockfish to disable own castling while allowing opponent castling
For artistic purposes, I would like to create and study engine games in which only one side is able to castle.
For this, I need to compile a version of Stockfish which never castles, and doesn't ...
-2
votes
1answer
177 views
How is AlphaZero defferent from Stockfish?
Obviously one is better than the other and AlphaZero uses machine learning and all, but what is the real reason for their different style of play? Given a position, both evaluate the next best move ...
1
vote
1answer
177 views
Why is stockfish not accepting my move?
I am trying to play with stockfish from terminal.
I entered the following commands:
position startpos e2e4
d
The output was:
Why is stockfish not accepting my move?
2
votes
0answers
44 views
Stockfish Transposition Table: 16 bit key equals 0 even if the key is found? [closed]
In Stockfish 11, they use the high 16 bits as key inside the cluster:
const uint16_t key16 = key >> 48; // Use the high 16 bits as key inside the cluster
This renders problem when key >> ...
1
vote
1answer
149 views
Mate In N algorithm-Lichess Computer Analysis
Is it possible to have the computer analysis report mate in 12 moves to only change that to mate in higher number of moves, like 15 for example, after it searches deeper?
3
votes
2answers
181 views
How to get static evaluation from Stockfish in case that a king is in check?
I am working on a program that should recognize the difference between human and computer players. For this purpose, I need some parameters. A part of them would be the individual values of the static ...
26
votes
7answers
6k views
Would an ensemble of chess engines beat the best one?
In many areas such as prediction and classification, ensemble methods tend to outperform individual methods. This made me wonder if it would make sense to pick a few of the top chess engines and work ...
5
votes
1answer
90 views
Probability of given position/piece configuration
I'm currently working on an image based FEN generator. I found a paper doing the same and they have used Stockfish to calculate the most probable piece configurations.
Now I wonder if Stockfish has ...
4
votes
1answer
305 views
Which chess GUIs support the chess variants Atomic and King of the Hill?
I want to play against Stockfish offline because I'm going on a trip. I downloaded the compiled exe from GitHub since my laptop will have limited Internet connection. After loading it into the Arena ...
4
votes
1answer
111 views
Trapped Rooks: Does Stockfish penalize more if the king can't castle temporarily?
In this talkchess thread, they discuss trapped rooks and castling rights. In post #5, user @Lyudmil Tsvetkov posted:
I would give at least some 10-15cps for temporary prevention of castling.
Here is ...
1
vote
1answer
296 views
Using Stockfish in an automated way, for example, to analyze games in pgn format
I am looking for a way to use Stockfish for an automated analysis of games which I have in pgn format. Similar to Fritz/Chessbase's Blunder Check function I would like Stockfish (or any other UCI ...
3
votes
1answer
160 views
When Lichess analyzes a game, how deep does it analysis?
In reference to the request computer analysis feature, how how deep is Stockfish analyzing, such as looking 12 moves ahead?
1
vote
1answer
43 views
How do you manually set switches when you are compiling Stockfish in Visual Studio? [closed]
How do you manually set switches when you are compiling Stockfish in Visual Studio?
In the type.h file it saids:
When Makefile is not used (e.g. with Microsoft Visual Studio) some switches
need ...
3
votes
2answers
170 views
Good against low-level humans but bad against low-level computer
I'm probably what you'd call an advanced beginner. I spend most of my chess time solving puzzles on Lichess, which tend to focus on midgame calculation, making beneficial trades, and finding ...
