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

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Chess Engine API

I am writing a C# 3D chess game in Unity. I am looking for a chess engine that can Take in an FEN string Return the best move to make given this FEN Check if the board given this FEN is in ...
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18 views

multi pv mode in GUI

is their any facility in babas chess (4.0) to facilitate multi pv mode. babas chess that i have only shows single pv. if it doesn't then which GUI (free) has facility for the multi pv mode running for ...
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2answers
140 views

What is the difference playing against human vs chess engine?

I have been playing with chess engines for over a year now at extreme difficulty levels. I never played a single game with a human player. I am worried that when i face humans in a tournament, my ...
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51 views

How can I know the Elo rating of my chess engine?

I built an uci compatible chess engine, and I would like to know its Elo rating. What is the easiest way to get it? I would like something that works both on Linux and Windows.
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75 views

Can a computer have a good tournament?

Tournament players can "have a good tournament" because of the psychology involved, so their playing strength will vary from game to game. Do computers play at a constant strength all the time, or do ...
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1k views

Why does Fritz prefer under-promotion in this position

Why does Fritz prefer under-promotion in this position - how can underpromotion to bishop evaluate so much higher than normal queen promotion? Can this be a bug in the Fritz 14 chess engine?
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What would approximately be the ICCF rating of a GM with no external help and of a computer with no human judgment?

I need some players who play at the ICCF (International Correspondence Chess Federation) to answer this question. What would approximately be the ICCF Elo rating of the two following players? ...
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1answer
52 views

How do I make a chess engine make moves in Arena?

I've been trying to use Arena to analyze a position, but the engine is not making any moves. I'm using Stockfish, and I click "analyze" to let the engine do the work, however there are no results on ...
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144 views

Opening theory versus strong AI suggestions

I have realised that Opening theory usually contains the highest quality chess, they have been pruned and honed. However sometimes when I am going through an opening with say Stockfish, I find that at ...
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106 views

Non chess specific game AI that learns any game and can play chess?

There is another question that asks "Has anyone ever written a chess program that does have insights of its own" that question is about a chess only game AI. I am asking having to learn the rules of ...
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39 views

Any chess engine that can start from the middle of a game [duplicate]

(i) Is there any Chess engine that can accept a partial game? E.g. 1. d4 d5 1. c4 Nf6 etc. and then start either as White or Black. I want to analyze some of my moves and want to use the Chess engine ...
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90 views

Possible to simulate specific chess situations?

I played around with cutechess and stockfish to simulate a specific situation in chess. But I ended up playing complete games against a human or cpu. Is it even possible to set up a chess situation by ...
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78 views

Any self learning computers playing chess? How good are they? [duplicate]

There is another question that asks "Has anyone ever written a chess program that does have insights of its own" I am asking having to learn the rules of the game, pieces, board size, etc. The program ...
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118 views

Permanent brain

Is permanent brain any beneficial if they share same core? "In chess games between two computers, pondering makes sense only if the competing chess engines use separate processors or cores. If they ...
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0answers
37 views

fairy chess engine for xboard different from fairymax

Fairymax shipped with the xboard package can play variant chess. Is there any other xboard engine that also plays variant chess? Runs on Linux or *BSD?
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3answers
125 views

Chess Engines that have “Deep” in their names?

Why is it that some chess engines have the word deep in their names? It does seem to be a common trend, but not one that is universal.
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431 views

Bishop vs Knight

I read in a book write by Fischer about piece values, and he said that a knight value 3 pawns, and a bishop values 3,25 pawns. I know that in the close positions knights are better, and I also read in ...
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130 views

Recommend chess software for windows 8.1

I've been running an old version Chessmaster: Grandmaster edition on my windows 8.1 laptop when I found a bug (Chessmaster recommended an illegal move), and I thought it was time to change my ...
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1answer
113 views

Find magic numbers for bitboards

I am writing a C++ chess engine and I am looking for magic numbers for Little-Endian Rank-File Mapping bitboards to generate moves for sliding pieces. The rival chess website gives magic numbers but ...
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2answers
153 views

Are there any chess engines which try to emulate human thinking?

As I understand it chess engines mostly share the basic pattern of having a simple score for the board position and then searching forward with some sort of alpha-beta pruning or similar. Presumably ...
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349 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 ...
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1answer
90 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 ...
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2answers
200 views

Could white have won this game?

[Event "Fritz, 19Ply / 19Ply"] [Site "?"] [Date "2015.04.15"] [Round "1"] [White "Stockfish 6"] [Black "Houdini 1.5a w32"] [Result "1/2-1/2"] [ECO "B42"] [PlyCount "292"] [FEN ""] 1. e4 c5 2. Nf3 e6 ...
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173 views

Engine not necessarily playing strong but “attractive”

Does anyone know a chess engine that is not programmed to be as strong as possible, but to play "attractive" chess ? The program should have an aggressive style and play for mate attacks, even if ...
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288 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 ...
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Matrix representation of piece position for a chess engine

Looking into a source code of a chess engine, I noticed matrices that represent position of some pieces. knightPos = [ -200, -100, -50, -50, -50, -50, -100, -200, -100, 0, 0, 0, 0, 0, 0, -100, ...
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Is there a free downloadable mini-chess program or 'chess engine'?

The fascinating miniature chess or mini-chess ' that is chess on a 6 by 6 board. I know there are tons of decent chess programs but has anyone written a decent chess program for mini-chess. Is there ...
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What is approximately the Elo rating of an engine which selects its moves randomly? [duplicate]

An engine which, in a given position, finds all the possible legal moves, and then selects one of them randomly (each move has the same probability of being chosen) and plays it on the board. Its ...
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72 views

Is there a software that analyses games through voice, telling you about moves and what you should have done, like Power Chess 98?

Almost 20 years ago there was a game called Power Chess 98 from Sierra. After every game you played, this sensual voice would analyze move by move telling you what you should have done, etc. It was ...
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96 views

Do better board representations than the standard one exist?

Consider the classical representation of the state of a chess game. I'll draw the board: R BK BNR PPPP PP N Q PP p np p ppp pp r bkqbnr Here is its move list: d5 d5 c4 c6 Nf3 e6 ...
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196 views

How do I change Stockfish's Engine Parameters?

I have no clue how to do this, I want to change its Contempt to -100.
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140 views

What is the gnuchess 5.60 “real” rating?

Anyone can say me what is the gnuchess 5.60 "real" rating with a Atom 1.2GHZ and 2GB RAM 32Bits? or something approximate... According to CCRL, gnuchess 5.60 elo is 2822 ! this website inflate the ...
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Collecting principal variations during search and using them in ordering?

In an Alpha Beta search (Negamax framework), how does one collect principal variations to use in move ordering and how does one use them, without using a transposition table? And would it be different ...
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101 views

How to play against an engine using scidb?

I'v just installed the scidb chess database, and I can't figure how to play against an engine from there.Is this feature even supported ? If it is, how to use it ?
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Static position analysis

This may well be too broad of a question. I'm currently in the process of programming a chess engine, but this is difficult for me as I'm not actually that good of a chess player. I'm having trouble ...
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2answers
126 views

how to evaluate the position inside the search function

using PVS Algorithm with Quiet search and zero window search what should the range of the score be (-infinity, infinity ) could it be as small as (-16000,16000) and what should the search return if ...
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About Alan Turing and chess

I read Turing had some algorithm or method he could use to play chess 'against' this pen and paper algorithm assigning certain numerical values to each piece. Is this true? Is there a pen and paper ...
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146 views

UCI engine command white giving the same move

I need help from someone who knows about UCI engines. I am giving the command by double clicking on stockfishengine.exe and manually entering commands. I wanted to play white and I am running arena to ...
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281 views

Which is the smallest chess engine with ELO at least 2000?

Preferably written in javascript, but the language really doesn't matter.
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230 views

UCI engine state notion

Hi guys I have a problem with using stockfish engine which is using UCI protocol. I wanted to play black and the computer white. But so far I think that uci engine has no notion of state and it gives ...
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409 views

Arena: How to have the engine only analyze and let me play as both black and white

I enjoy watching chess videos where, say, an opening is analyzed and besides the main line the lecturer also explores alternatives and explains why they are bad or good. I would like to do this ...
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543 views

Forced checkmate examples where engines fail

Do you know example where recent chess engines (Houdini, Rybka, Komodo, ...) failed to find a forced checkmate. I guess they must find mate in 1 or 2 all the time but maybe are they failing to be as ...
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231 views

Playing solely against chess engine?

I don't have many friends to play chess with that are at my skill level so many times I am forced to play against the computer. It seems like the computer plays much differently than a human, or at ...
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229 views

An efficient program, which generates all next moves for all pieces in C/C++

I am looking for an efficient (fast) program to generate next moves for all pieces. I need it in C++, because I will program in C++. Thank you!
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236 views

Can you compile Stockfish in Windows without Unix/GNU?

Can you compile Stockfish in Windows (without Unix/GNU), perhaps via Visual Studio? The official "how to compile Stockfish on Windows" suggests using MinGW (see links below) and I am looking for a ...
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129 views

Computer assistance in online blitz chess

I play on chess.com which is usually a very positive and pleasant experience. I like to play five minute time controls with 0 second increments which means it translates to a very fast paced game. ...
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145 views

In a ChessBase opening tree how can we put a column that displays the percent of time each move is played or a column that displays “Perf” minus “Av”?

Here are the columns displayed in an opening tree on ChessBase 12: I would be interested in adding two columns: A column which displays the percent of time each move is played in the position. So ...
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759 views

Stockfish ELO vs search depth

Could Stockfish beat Magnus Carlsen if its moves were calculated with the UCI command "go depth 16"? If not, how can I find the depth "d" at which Stockfish's strength surpasses top GMs? We assume ...
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How do I find people to play chess with me through correspondence?

I really would like to play chess, nevertheless, I do not have access to physical chess players. My question is, how do I find people to play chess with me by email? I have not been successful in ...
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How many positions per second can a modern supercomputer calculate?

If we created a very powerful supercomputer (as powerful as the current most powerful supercomputers) which was only designed to find forced mates... How many positions could it calculate per second? ...