Stockfish | powerful UCI chess engine derived from Glaurung | Game Engine library
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QUESTION
I am currently developing a chess engine in C++, and I am in the process of debugging my move generator. For this purpose, I wrote a simple perft()
function:
ANSWER
Answered 2022-Feb-22 at 01:14This is how you would like to debug your move generator using perft.
- Given startpos as p1, generate perft(3) for your engine and sf. (you did that)
- Now check any move that have different nodes, you pick a2a3. (you did that)
- Given startpos + a2a3 as p2, generate perft(2) for your engine and sf. (you partially did this)
- Now check any move that have different nodes in step 3. Let's say move x.
- Given startpos + a2a3 + x as p3, generate perft(1) for your engine and sf.
Since that is only perft(1) by this time you will be able to figure out the wrong move or the missing move from your generator. Setup that last position or p3 on the board and see the wrong/missing moves from your engine compared to sf perft(1) result.
QUESTION
I was trying to sort the food from the most caloric to the less caloric, I have a 2-column dataset (with about 2000 different foods), with the Name of the food and the Energy in kcal of that food.
Name Energy, kcal Fish 80 Meat 70 Oil 900I tried with:
...ANSWER
Answered 2022-Jan-31 at 16:02The kcal values seem to be stored as string, which explains the result of sort (values are sorted alphabetically).
To fix this, use pandas.DataFrame.astype
to set the type of the kcal column to a numeric type (eg. int
):
QUESTION
Use the answer in the question: simultaneous read and write to child's stdio using boost.process,
I refactored the code and hybridized the new method using the Boost library. I've been successful in making a pipes connection with Stockfish, but this is also where I get errors I've never seen before, not even Google helps.
Here is what I have tried:
...ANSWER
Answered 2022-Jan-15 at 03:04You are printing to cout
as if the async operations happen immediately. That's not the case. The async operations only happen when the io service runs.
QUESTION
I'm currently trying to use uci-analyser found at this link:
https://www.cs.kent.ac.uk/people/staff/djb/uci-analyser/
I'm trying to run it on Ubuntu 21.0 impish. Used the source file. Confirmed C++ compiler and confirmed installation by going with the Readme.txt file by using the Makefile. Confirmed stockfish installed in Ubuntu via apt. Confirmed file "analyser" exists and permission for owner and group is "Read and write", Others "Read-only" and checked to allow to execute file as program.
Command tried
analyse --engine stockfish --searchdepth 12 --annotatePGN games-uci.pgn > games-annotated.pgn
Error
analyse: command not found
Any help would be greatly appreciated.
...ANSWER
Answered 2022-Jan-11 at 04:40Try
./analyse --engine stockfish ...
QUESTION
I am trying to write a html page that includes stockfish.js. (My goal is to create a site where yoy can play certain positions against stockfish.)
The problem is that stockfish.js uses SharedArrayBuffer, so when i load the html Firefox-console outputs "ReferenceError: SharedArrayBuffer is not defined".
On the stockfishjs git-page it says that to avoid this problem I need to add "these HTTP headers on the top level response:
Cross-Origin-Embedder-Policy: require-corp
Cross-Origin-Opener-Policy: same-origin
And the following header on the included files:
Cross-Origin-Embedder-Policy: require-corp"
But how do I do that? (I am new to web-developing, and unfamiliar with php. I used py -m server.http to "imitate" a server while i work.)
...ANSWER
Answered 2022-Jan-01 at 20:35How you add HTTP headers depends on which HTTP server you are using and/or which server-side programming languages / frameworks you are using.
The simple HTTP server that comes with Python won't support PHP, so adding PHP directives to an file served from it isn't going to do anything except send some junk to the browser.
This question covers adding headers using Python, but you would probably be better off duplicating whatever your production environment is going to be so you can test your configuration in development before deploying it.
QUESTION
I am trying to create a database to train a basic machine learning algorithm off of. However, when I run the code, it only creates two rows, but I am trying to create multiple rows, of each individual position in the game, accompanied by a stockfish analysis at the end for the position. The code either seems to be making three moves, then writing the file or overwriting the file for each move. I cannot tell which one it is. To elaborate further, the example below is the output of the code I wrote, where number = 3:
However, I am looking for something like this:
0 1 2 3 4 5 6 7 8 P P p p P P p p P P p pHere is my code:
...ANSWER
Answered 2021-Dec-28 at 18:55As pointed out by Camaendir in the comment, you're opening your output file on every iteration of the move. This will open the file "for creating" which overwrites any previous data.
Also, from looking at your code and what you're trying to do, I see there are two ways to accomplish what you want, and you're trying both at the same time and that's creating other issues.
Either open the CSV file for writing, and loop over your moves writing as you process the board/moves with writer.writerow(stockfish(board, 10))/100)
:
- open file for writing
- create csv.Writer from file
- write your header
- loop over your moves
- process a move/board
- write move/board
- close file
Or, process all the moves/board appending to data
, then open your CSV file and write data writer.writerows(data)
:
- loop over your moves
- process a move/board
- append that to
data
- open file for writing
- create csv.Writer from file
- write your header
- write all rows with
data
- close the file
QUESTION
I am trying to access Stockfish evaluations through python chess, however, whenever I try to run the code, I am met with "[Errno 8] Exec format error". I tried running the some code off the documentation and am met with the same error. I read some articles and they talked about adding a shebang to the executable code but I don't see anyone else needing to do this, or any reference of it in the documentation. Am I just really dumb? Sorry, I am still new to coding. The documentation code is below:
...ANSWER
Answered 2021-Dec-26 at 01:43Use a stockfish that is compiled for linux as the machine is not run on windows.
If you encounter permission issue use the command for example:
QUESTION
This is part of a larger project, but I created a new file to solve this one problem. Sorry, I am still new to coding. Currently, I am trying to get stockfish evaluations for positions in Chess, however whenever I try to run the code, I get "AttributeError: module 'chess.engine' has no attribute 'SimpleEngine'" I have looked over the internet and can't find anything, am I being dumb? I tried the code from the documentation as well, and I still get the same error. This is the code from the documentation:
...ANSWER
Answered 2021-Dec-25 at 19:40I suppose you use an outdated version of the python-chess
package. Your current version is 0.23.11
while the latest version is 1.999
.
You should try to upgrade your package:
QUESTION
I have made a GUI (using PySimpleGUI) where you can play against Stockfish (I used python-chess module). I make an .exe-file using Pyinstaller --noconsole, but when i run it, it opens Stockfish in a console. When I run it form source, in PyCharm, Stockfish runs silently in the background.
The relevant lines of code are (I guess):
engine = chess.engine.SimpleEngine.popen_uci(engine_filename, shell = False)
and, a bit later,
best_move = engine.play(board, chess.engine.Limit(depth=20)).move
Any advice on how I can make Stockfish run silently in the background also form the .exe-file?
...ANSWER
Answered 2021-Dec-14 at 13:07Define your engine like below.
QUESTION
I'm using the io package to work with an executable defined in my PATH. The executable is called "Stockfish" (Chess Engine) and obviously usable via command line tools.
In order to let the engine search for the best move, you use "go depth n" - the higher the depth - the longer it takes to search. Using my command line tool it searches for about 5 seconds using a depth of 20, and it looks like this:
go depth 20
info string NNUE evaluation using nn-3475407dc199.nnue enabled
info depth 1 seldepth 1 multipv 1 score cp -161 nodes 26 nps 3714 tbhits 0 time 7 pv e7e6
info depth 2 seldepth 2 multipv 1 score cp -161 nodes 51 nps 6375 tbhits 0 time 8 pv e7e6 f1d3
info depth 3 seldepth 3 multipv 1 score cp -161 nodes 79 nps 7900 tbhits 0 time 10 pv e7e6 f1d3 g8f6
info depth 4 seldepth 4 multipv 1 score cp -161 nodes 113 nps 9416 tbhits 0 time 12 pv e7e6 f1d3 g8f6 b1c3
[...]
bestmove e7e6 ponder h2h4
Now, using io.WriteString it finishes after milliseconds without any (visible) calculation: (That's also the output of the code below)
Stockfish 14 by the Stockfish developers (see AUTHORS file)
info string NNUE evaluation using nn-3475407dc199.nnue enabled
bestmove b6b5
Here's the code I use:
...ANSWER
Answered 2021-Oct-22 at 18:51To leverage engines like stockfish
- you need to start the process and keep it running.
You are executing it, passing 2 commands via a Stdin pipe, then closing the pipe. Closing the pipe indicates to the program that you are no longer interested in what the engine has to say.
To run it - and keep it running - you need something like:
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