Questions tagged [stockfish]
Stockfish is a strong open-source chess engine.
132
questions
1
vote
0answers
26 views
Stockfish on Android Question
I recently downloaded Stockfish 10 on my android phone and after unzipping the rar file, there were three separate engine binaries and I am wondering which one would be the strongest one to use. The ...
12
votes
2answers
6k views
Bad Stockfish evaluation
This is the study
[fen "3B4/1r2p3/r2p1p2/bkp1P1p1/1p1P1PPp/p1P4P/PPBK4/8 w - - 0 1 "]
As you can see, Stockfish gives an absolute decisive win for black, though it is clearly a draw!!
Check it out ...
1
vote
1answer
60 views
How to stop Stockfish analysis?
I am using Chessbase 13. I would like Stockfish to stop analyzing until I make it start again. What happens now is that I make it stop, and as soon as I go on to the next move, it starts analyzing ...
2
votes
1answer
67 views
How to use the Ponder option in stockfish / UCI
I'm trying to understand stockfish Ponder functionality. I'm very interested to let stockfish think when the opponent is thinking. From what I understand you can do it as follows
$> uci
$> ...
8
votes
5answers
283 views
Why does Fishtesting test Stockfish against itself, not other engines?
As I understand the so-called Fishtesting, people write patches, then try the patches against the current version of Stockfish. If the new version performs better, it's promoted to be the main version;...
4
votes
1answer
194 views
Are there any attempts at writing Stockfish MCTS?
As of time of writing, there is one major traditional engine using Monte Carlo Tree Search for its search algorithm - Komodo. The MCTS version of Komodo started out weak but gained strength quickly, ...
1
vote
1answer
151 views
Why does NCM show no progress for Stockfish when each new version has to beat the previous version?
NCM plays each Stockfish dev build 20,000 times against Stockfish 7. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds. As of time of writing, one ...
-3
votes
2answers
114 views
Stockfish 9 giving erroneous reading
Sam Loyd, 1860
[fen "8/8/8/8/B6n/7p/6k1/4K3 w - - 0 1"]
1.Bd7!! h2 2.Bc6 Kg1 3.Bh1!! Kxh1 4.Kf2.
(Ke1, Ba4; Kg2, Nh4, h3) says mate in 54 after 1.Bd7!! h2 2.Bc6 Kg1 3.Bh1!! Kxh1 4.Kf2.
This is a ...
5
votes
1answer
106 views
Combining AlphaZero methods with Stockfish methods [closed]
NOTE: I asked a similar question at the ai stackexchange, but didn't get any satisfying answers, so I will post an updated version of the question here, to see if someone with more of a chess ...
0
votes
1answer
48 views
Standard for current position evaluation via UCIs
I am trying to interact with stockfish via UCI to get a current evaluation of the board. When you do a simple
position startpos
go depth 10
The board will helpfully return
...[previous depths]
...
4
votes
3answers
310 views
Solvable studies that computers fail to crack
Are there chess studies that require an outside of the box thinking that goes beyond the concrete calculation capabilities of today's engines (e.g. Stockfish)?
I have sometimes seen certain endgames ...
3
votes
2answers
223 views
Not in stalemate, but why is this a draw?
I was practicing with stockfish level 8, having two rooks in the endgame whereas stockfish has only one. At the 78th move, it was declared as a draw. But, it was not a stalemate. Can anyone please ...
4
votes
1answer
169 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 ...
2
votes
2answers
137 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 ...
9
votes
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 ...
3
votes
2answers
307 views
AlphaZero and the revenge of the Artificial Intelligence
Answering this question, @SmallChess offered this answer:
Before Google's chess journey, the chess engine community believed:
AI chess will not beat classical programming because neural networks
...
3
votes
3answers
247 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 ...
0
votes
1answer
36 views
Importing and analysing games played on chess.com [closed]
How to import entire game from chess.com game to stockfish?
4
votes
2answers
365 views
What is 'Depth' in Lichess game analysis?
I have started analyzing my games in Lichess. I'm wondering what does Depth mean in the Stockfish analysis?
0
votes
1answer
71 views
Is any tool which allow analyse EPD file and add evaluation score per I want specify depth/multi PV
I tested some tools which allow analysis EPD files but they not work like I want:
I can use Arena but it will not annotate back EPD - it create protocol file.
I can use SCID vs PC but it will not ...
1
vote
1answer
286 views
How to use nodestime option in Stockfish 10?
By looking at the uci option file of Stockfish 10 I found this line:
o["nodestime"] << Option(0, 0, 10000);
How exactly does one use nodestime?
1
vote
1answer
223 views
Why is Stockfish giving me this weird move?
When I ask for the best move for this FEN:
1rbq1rk1/b4p2/p2p3p/3Bp3/P3P3/2P4P/R2Q1PP1/4K2R w -- - 0 30
[FEN "1rbq1rk1/b4p2/p2p3p/3Bp3/P3P3/2P4P/R2Q1PP1/4K2R w - - 0 30"]
Stockfish (via Python) ...
5
votes
1answer
842 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 ...
4
votes
2answers
169 views
What's the rationale behind chess engines conditionally allowing threefold repetitions when assigning a draw score?
When a chess engine sees a position p repeated once (i.e. position p occurred twice) it immediately assigns the second occurrence of position p a draw score. This makes sense because position p doesn'...
4
votes
1answer
204 views
Why Stockfish 9 fails to see the draw?
I can reach a draw with White in the below position. The Stockfish 9, however, gives 28.1 points for black after Kf3,Ba1,Ke4,Bb2,Kd3.
[FEN "8/p7/kpP5/qrp1b3/rpP2b2/pP4b1/P3K3/8 w - - 0 1"]
1. Kf3 ...
1
vote
2answers
134 views
Android Stockfish communication works differently than on PC? [closed]
How is number of threads to use written on Android versions of Stockfish? Whole communication works but somehow I still can't change number of threads. I even have working code for PC version of ...
2
votes
3answers
323 views
How many moves out do the static board evaluations use?
These days many online chess websites offer a board evaluation rating, often a bar, sometimes a number, sometimes both, as is the case here (see two red circles):
Black will take a pawn soon, so the ...
3
votes
5answers
554 views
Reasonable engines to test against (Not StockFish)
I've built a chess engine in Python which I've been testing against StockFish through the use of the Python-Chess package.
Testing against StockFish seems/is problematic, and as a result I'm ...
-6
votes
1answer
658 views
LICHESS analysis, why did it propose this outrageous move? [closed]
I was playing a game on lichess, and afterwards asked for a computer analysis, where instead of my perfectly fine move XX the computer insisted on another better move YY, why is that, how can I ...
4
votes
1answer
185 views
How are chess engines able to rank a Mate in X above a Mate in X+Y?
According to an engine, a mate in X moves = +infinity, since it is a forced win for it.
Also according to an engine, a mate in X+Y moves = +infinity, since it's a forced win (just more moves, but an ...
0
votes
1answer
89 views
Is there a way to get MANY and FAST (but not deep) position evaluations in javascript?
I am working on a statistical chess project that needs to evaluate many (about 20-30) different positions per turn. They do not need to be deep but fast.
Is there a possibility to use engines (...
3
votes
1answer
373 views
Why does Stockfish give a negative score in a theoretical win for white?
8/3k4/8/3K4/3P4/8/8/8 b - - 0 1
(Black to move)
This is a theoretical win since White has the opposition and the king is in front of the pawn.
I have downloaded the Windows version for Stockfish 9 ...
0
votes
2answers
152 views
Why Qd1 is the best move?
As per subject, why Qd1 is the best move and all other moves for queen like Qd2 and Qd3 are not? I understand that it’s important to cover d column but why 1 and not 2 or 3?
Also why Rd1 is not a ...
15
votes
8answers
7k views
Why is exchanging the queens bad in this position?
Stockfish gives +6.6 to the following position.
The recommended move by stockfish is Rc1 which maintains +6.6 advantage but if I exchange the queens right away (Qxd6), stockfish gives me +5. What's ...
3
votes
1answer
138 views
What kind of hand-crafted features do top performing family of engines use to evaluate a position?
AlphaZero paper which introduced the engine which allegidly outperformed stockfish mentioned the following:
These programs evaluate positions using features handcrafted by human
grandmasters and ...
1
vote
1answer
283 views
analyse and store a annotated game by stockfish in scid
Salut
I installed scid and set all necessities in order to make an analysis by stockfish, but I could not find the option to save the done analysis.
My question is just silly but I cannot find ...
7
votes
3answers
961 views
Why does Stockfish prefer White here?
My analysis of the position:
Materially, black is a pawn up.
White's rooks and bishop are active.
White has potential counterplay on Black's Kingside but I think it can be defended by the move Ng6.
...
4
votes
1answer
180 views
Output whether the best move is “much better” or only “slightly better” than the other moves
On Oct 31, 2014, Tord Romstad wrote:
The moves are not searched in descending order from best to worst. Stockfish has no idea which move is the second, third best, etc., and it doesn't have any ...
3
votes
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 ...
4
votes
5answers
501 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 ...
4
votes
6answers
5k views
Is it really possible to beat a stockfish level 8 computer in any time that is between 3+0 and 15+0?
I've watched a couple of games where people play against stockfish level 8 on lichess, and they pretty much lose all the time. Is it possible for someone to beat a level 8 computer in any time between ...
20
votes
2answers
3k views
Stockfish blunders away a piece
Using stockfish_8_x64 with Arena 3.5.1, I see a weird pick by Stockfish. Start here:
White, Stockfish, to move. It plays bb6-g1,losing the bishop and the win.
Also strange: the same engine ...
1
vote
1answer
1k views
is there a list of stockfish hidden/deleted commands
I have downloaded the latest stockfish and I am running it on the command line.
There is a hidden command 'd' which displays the current board.
Also, the "debug on" command is not implemented, even ...
-1
votes
1answer
252 views
Stockfish crashes on fen string
I have created a GUI that communicates with a Stockfish 8 engine by passing it a FEN string. Everything works nice but on some specific FEN strings, Stockfish crashes. I don't have any clue why...
...
2
votes
2answers
307 views
Is it possible for stockfish to tell that mate is in X moves, when mate is in X + Y moves?
I know that it is possible for a chess engine to evaluate a position as mate in X moves, when in fact there exist a mate in smaller number of moves. But can the reverse situation happen?
For example ...
21
votes
7answers
12k 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 ...
36
votes
11answers
20k views
How is Alpha Zero “more human”?
I have a possibly naive question about AlphaZero. I have seen it described as playing in a "more human" style than other computers, but whatever it does, it gains about 100 ELO points by doing it. ...
28
votes
2answers
6k views
Understanding AlphaZero
Very recently, the news came out that Alphabet's DeepMind research team have extended their machine learning engine to play both Shogi and chess. Apparently, after only a few hours of self-learning, ...
4
votes
1answer
626 views
Stockfish is cheating?
I am using the Arena GUI to run Stockfish. I set up the following position.
[FEN "r2q1rk1/2p1bppp/p1n5/1p1pP3/3Pn3/1P3N1P/1P3PP1/RNBQR1K1 w - - 0 11"]
[SetUp "1"]
At a search depth of 16 half moves ...
7
votes
1answer
2k views
Do Stockfish and the tablebase work together or independently?
I use Arena GUI together with stockfish in engine games. I want to download a 6-piece tablebase but that is just a lot of work (and perhaps unnecessary). If I download the tablebase (syzygy), does ...
