Questions tagged [engines]

Questions relating to chess engines: any computer program that is able to play/analyze chess positions.

17 questions with no upvoted or accepted answers
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236 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 ...
6
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0answers
194 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 ...
6
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0answers
114 views

Stockfish position evaluation component terms in Python?

I saw the excellent Javascript-based guide to how Stockfish evaluates (non-NNUE). Is there a python version out there, perhaps using python-chess? What I am trying to do (in case you have other ...
5
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0answers
103 views

How engines accomplish calculation speeds of 1000kN/s per Core and above?

I am developing a chess engine to improve my Cpp. It works, which means it generates legal moves and it can play them out. I optimized a bit and now achieve ~20k N / s, which is way better than my ...
5
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0answers
171 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 ...
5
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0answers
68 views

Human assisted handicapped engine against engine, adjustable parameters

I am looking for software preferably local interface on windows, to play human+engine against engine with access to search parameters such as depth and "greed" or dismissal factor (...
4
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0answers
305 views

Wrong perft result?

I'm writing a chess engine for fun. Currently I'm finishing writing the move generator. During the research I leaned about PERFT for debugging my software. Indeed, I found many bugs, some of them was "...
3
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0answers
85 views

Debugging my PERFT coding

I'm stuck debugging my move generation and do move function. I noticed that the castling as actually the problem in my code, but I think I have implemented everything right. I installed some java ...
3
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0answers
89 views

Was there a bug in Stockfish similar to the bug in Houdini 6.02?

This is a follow-up question to Is Houdini 6 a Stockfish clone? Houdini 6.03 included a bugfix: "Correction for incorrect detection of stalemate in positions with white pawn capture moves." ...
2
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0answers
21 views

Setting up Stockfish for Droidfish

I would like to set up Stockfish for the android app Droidfish. How do I set up a server for a Windows machine (my linux machine is too weak) using SF13?
2
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0answers
43 views

How do I get Stockfish to write its analysis to a file using a batch file on Windows?

I can get this to work in a Windows Command Prompt window as follows: stockfish_14_x64_modern.exe uci ucinewgame position fen rnb1kbnr/ppp1pppp/8/3q4/8/8/PPPP1PPP/RNBQKBNR w KQkq - 0 1 go depth 17 ...
2
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0answers
134 views

A classical Rook vs Bishop endgame (with pawns)

Karsten Muller and Lamprecht give the following ending as a win in Fundamental Chess Ending. However , Houdini 6.02 does not find a win as far as I analyzed. The ending is the following: R7/5pkp/4b1p1/...
2
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0answers
78 views

Chess Engine Using LazySMP

I was hoping to parallelize the chess engine I was currently working on. I have done some research on some of the various types of algorithms such as YBWC, ABDADA, and LazySMP which is currently used ...
2
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57 views

Where to find a list of the computer stored in the FICS Games Database?

According to the FICS Games Database there are currently 1,525 "computers stored". Such accounts are indicated by a "(C)" after the username. However, this suffix does not seem to be recorded in the ...
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148 views

SCID vs. PC: Multi-Engine Analysis

Is it possible to configure SCID to output the annotating engine in the variation itself? For example; Ne5 (Stockfish: -0.01 / +0.32 25. Bc4 ...) (Engine2: +0.20 / +0.48 25. 0-0 ...) (Engine3:...
0
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0answers
43 views

How to validate chess moves with a server? Winboard and Unity 2020.3

I'm looking for advice on how to implement online chess move validation using a winboard chess engine. I am creating a mobile battle chess game in Unity 2020.3. Right now I have the possible moves for ...
0
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23 views

How to convert commentary into variation in Arena chess?

After analyzing a game by Arena, I got the following output. The moves in the green font are engine suggestion/variation. The problem is I cannot click on moves (in green color). It is put as a ...