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

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How does a chess engine mimic an Elo rating

I am a fairly new chess player (say 1400) and I would like to play against Stockfish and win some of the time. If I change the strength to 1400 then what does the algorithm actually do ? Does it make ...
1
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1answer
65 views

Stop SF MultiPV from returning an upperbound

For a given position, I'd like to compute an evaluation of the 3 best moves. I send this to Stockfish: setoption name MultiPV value 3 position startpos go movetime 500.0 // search for 0.5 seconds I ...
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47 views

Would you play this chess variant? [closed]

The name of the chess variant is ' Connect Score '. It's a unique game that combines Chess with Dots and Boxes. The game rules and game printouts can be viewed at: http://connect-score.blogspot.ca/ ...
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3answers
163 views

How to make a computer play like a player?

Since computers have surpassed by now all humans, it should be very easy for it to emulate a strength of an weaker player. So the idea is: Supply a number of games The computer ajusts its options ...
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1answer
154 views

What is the Elo rating of a chess computer that can only look 1, 2, 3, … moves ahead

Has anyone calculated the average Elo rating of a chess computer as a function of the number of half moves or plys ahead it can look. I realise that the Elo is also a function of the choice of move ...
0
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1answer
72 views

What fraction of a Pawn do the most powerful chess engines (Komodo, Stockfish, Houdini, Fritz, Hiarcs, Gull, …) use as their evaluation unit?

I've heard that the most common evaluation unit is 1/100 of a Pawn. But some engines use 1/1000 of a Pawn as their evaluation unit. I've also heard that Stockfish used 1/256 of a Pawn as its ...
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2answers
216 views

How to go about beating chess engines?

I play regularly long games (60min each) with Droidfish/Stockfish the depth is always close around 21. From time to time I overlook taktical flaws in my moves, obviously playing on worse positions ...
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4answers
2k views

Do chess engines store all of the previously analysed positions between moves

I am starting to play with chess engines. I notice that the best chess engines can take several minutes to move. I am wondering why. Before each move the engine examines all legal future moves to some ...
8
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1answer
158 views

Instructive chess positions (and famous games/studies containing these) that engines do not understand well

Basically, I would like to ask people to share their knowledge on famous and/or particularly instructive examples of chess positions, which chess engines do not understand well (i.e. do not evaluate ...
2
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1answer
65 views

What is the number of “CPU” next to each engine's name in engines rating list? And is my computer 1CPU, 2CPU or 4CPU?

Look at this engine rating list which compares all the versions of Stockfish. After the name of each engine we can see one of these three things: 4CPU 2CPU Nothing, which probably means: 1CPU And ...
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2answers
131 views

Is it possible for any titled player to beat chess engine?

This topic has been discussed before but I want to reopen this thread because of Stockfish vs Nakamura. I was watching the series on chess.com, it happened few days ago Game 2, I was hoping to see if ...
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2answers
214 views

What are the common mistakes make by chess engines at ELO range 1500 - 1800?

I'm a software developer and occasional chess player at elo rating 1500. Chess engines of different level play different type of games with some mistakes according to that given level. I'm ...
4
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1answer
147 views

How do top players use computers to improve their play?

This question is inspired by yesterday's matches between Hikaru Nakamura + Rybka vs Stockfish. Nakamura was allowed to use an older version of Rybka to help him, and Stockfish was allowed to play with ...
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3answers
132 views

How to evaluate my move with UCI engine?

I am looking for a way to analyse the moves I play. I'm NOT looking for a suggestion of a GUI that does this, or using Chessbase to do this. I want to know how to do this by communicating directly ...
2
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1answer
216 views

Busted openings

http://en.chessbase.com/post/rajlich-busting-the-king-s-gambit-this-time-for-sure The link is to a chessbase article speaking about a group of researchers who claim that that king's gambit is busted. ...
3
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3answers
309 views

Will quantum computers solve chess?

The theory is that there are more that 10^40 positions, and a computer that works with an atomic scale has to be impossibly large(As in galaxy-scale large), and well beyond our current level of ...
3
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3answers
99 views

Is there a chess engine that allows you to specify which opening it uses?

I would like to practice against a particular opening - outside of bribing smart guinea pigs who know how to play chess, is there any way I can get opponents who always use a certain opening?
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1answer
49 views

Can you run “Full Analysis” in Fritz with a different engine?

I have added Stockfish to the Deep Fritz GUI, and I even marked all engines except for Stockfish as inactive. However, when I run the "Full Analysis" it's still using Fritz. Is there a way to use a ...
3
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2answers
136 views

Which interface protocol should I implement for my chess engine?

I am writing a chess engine in Java https://github.com/RomainGoussault/Deepov. I know there are several interface protocols out there (UCI, Winboard protocol, etc) and I don't know which to ...
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1answer
119 views

Where can I buy the chess engine Komodo? Do I get somekind of bonus premium membership with it? And when will its next version be released? [closed]

I have three questions about the chess engine Komodo. Firstly, where can I buy and order it? I would like to have it in a CD (not just download it). I went into the website of a chess store near ...
0
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1answer
308 views

GUI for stockfish that can analyse the full game

I am looking for a GUI for stockfish that can analyse the whole chess game and give me the following output: For every move in the game, it should give me a list of N (let it be 3) best moves with a ...
0
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1answer
144 views

Since each engine has its own style of play… which engines are more positional/strategic and which engines are more sharp/tactical?

I’ve heard that each engine has its own style of play. Some are more positional and strategic, while others are more sharp and tactical. And so my question is: could you roughly sort the following ...
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0answers
31 views

Multiple opening books in Arena?

In Arena, you can select an "Arena main book" which will be the chess opening book that will be displayed in the Book/TB tab. However, is there any way to merge multiple opening books into that tab? ...
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3answers
278 views

Chess engine with an ELO of less than 1800

I am looking for an UCI compatible engine with an ELO of less than 1800. Not a version of Houdini or Stockfish with an ELO of 1800. I want a engine with a real ELO rating of 1800 or less. If you can ...
4
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1answer
2k views

How to download Stockfish and install it on the Fritz/ChessBase GUI?

I'm on Windows 8. I have the Fritz/ChessBase GUI since I bought both Fritz 12 and Houdini 3 Pro. I would like to know how exactly can I download and install the free latest version (and most powerful ...
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47 views

How do I use the “Mate Search” function of either Houdini 3 Pro x64 or Fritz 12? It doesn’t seem to work…

The “Mate Search” function of my two chess engines, Houdini 3 Pro x64 and Fritz 12, does not work. I click on “Levels” and then on “Mate Search”. Then a small “Mate Search” window pops up. When ...
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4answers
167 views

How to check if a move is legal using stockfish?

Let us say that I input a wrong move in stockfish. What answer will stockfish send me back? Or is there a function to check if a move is bad? People I found a solution by myself.
2
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1answer
86 views

What are the scales of the numerical evaluations of the strongest engines based on?

Different engines have different scales for their numerical evaluations (for example, Houdini's evaluations are usually much lower than Stockfish's evaluations). This is because different engines use ...
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2answers
119 views

How to get position evaluation with UCI?

I am trying to get score about current position directly with UCI (I am using latest stockfish). After reading the protocol I see that these commands ask engine to analyse the position: uci ...
2
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2answers
127 views

What relative point values of pieces do engines use?

Humans use: Pawn = 1 Knight = 3 Bishop = 3 Rook = 5 Queen = 9.5 Bishop pair = +0.5 But I would like to know what relative point values do engines use (preferably strong engines, like Stockfish, ...
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2answers
166 views

How to make own opening book for chess engine?

I am currently working on a chess engine in java. I am using mini max algorithm with alpha beta pruning to select the best move. However it is inefficient to use the algorithm for selecting opening ...
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1answer
188 views

What evaluations do various engines give of the starting position at a depth of at least 30?

I am looking for evaluations that various engines give of: The starting position, with no move made yet. The position after 1. e4 The position after 1. d4 The position after 1. c4 The position after ...
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1answer
71 views

Is my engine working properly?

I noticed that when I put my Houdini 3 Pro x64 in the "Infinite Analysis" mode, he tends to use a lot of time to evaluate the bad moves... Sometimes he even uses like 30 seconds on the first 10 best ...
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2answers
136 views

How to repair black's position in this Game?

In this game black made some mistakes which leads to final position. While analyse this game engine not willing to capture bishop . [Event ""] [Site ""] [Date "2014.07.05"] [Round "-"] [White ...
5
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2answers
340 views

Why does Stockfish website offer many apps to download?

I want to get a strong engine to practice while I'm not home. Look at: http://stockfishchess.org/download, we see a list of apps to download for the Stockfish engine. Why are there three apps to ...
5
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2answers
212 views

Has there ever been a game where multiple humans play against a single chess computer?

I'm wondering if the following scenario has ever been played out: Once side of a chess game is played by multiple humans at once, collaboratively determining what the next move will be. This ...
3
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1answer
185 views

Fastest way to beat Gnu-Chess Easy as black?

This is more of a puzzle. As far as I can ascertain, Gnu-Chess Easy always plays the same, and so the question is, is what are the least amount of moves required to beat Gnu Chess on easy. Just to ...
5
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3answers
176 views

In correspondence games, is it considered cheating to get an engine evaluation of the current position?

Is it considered cheating to simply get an engine score for the current position in an ongoing game without looking at any of the generated lines? I'm guessing the answer is yes, but just curious (and ...
3
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3answers
278 views

Is there a software to measure a player's strength based on a game?

I flicked through some papers that described how one can obtain an ELO estimate based on a game. (Basically we were comparing players' moves to the best moves suggested by a strong chess engine. My ...
3
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1answer
152 views

Why is engine's speed slow at the start?

I noticed that the nps (nodes per seconds) of different chess engines is very low at the start of the analysis and only after several seconds reaches is peak value. Does anybody have an explanation of ...
2
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1answer
123 views

Solving the Game of Chess: Trans-Computational in Nature or No?

Mathematicians have categorized chess as a trans-computational problem. A transcomputational problem is one in which a computer would need to exceed the size of the earth in order to have the ...
3
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4answers
279 views

What are good ways to check blunders after the match?

Currently I am using Tarrasch for GUI and Rybka 2.3.2a as the engine. With that, I am able to kibitzing every position in the game and check for any blunder. So basically this is what I always did: ...
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0answers
62 views

App to read pgn surface

Is there anyway to read pgn's on the surface 2 (windows 8), besides using any online tool for that matter.
2
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1answer
182 views

Are there “pure brute force” engines? [closed]

Is there a chess engine that just goes for brute force search, looking for a forced mating sequence + material advantage in a couple of moves? This would especially be interesting to "prove" some ...
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3answers
128 views

Rate the difficulty of this computer?

I've just been playing for fun online a little bit, and was wondering how hard the computer I've been playing against is. NOTE: This was made for a javascript competition, and doesn't include ...
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4answers
299 views

Are modern chess programs tactically perfect?

In a given situation, can we assume that a chess engine is tactically perfect - meaning that it can find all possible tactics which are there in that position. Is it possible for the best of modern ...
2
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1answer
125 views

What is the strongest chess engine for blitz time controls?

There are all kinds of lists of the strongest chess engines at standard time controls. Here's one I picked more or less at random. But does anyone track which engines are strongest at faster time ...
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4answers
577 views

Are computers destroying chess?

These days I have been watching the candidates tournament, and I couldn't avoid noticing that players are reeling/scared of computer home preparation "little bit too much". For example: in the ...
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2answers
252 views

Javascript based Chess engine

In one of my previous questions I asked about comparison of the strongest chess engines and got a really good answer. While there are little or no doubts that chess engines are stronger than humans, I ...
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2answers
357 views

Is there a chess engine that does NOT use brute-force search?

Every chess engine I've ever heard of (including all I found listed on Wikipedia) uses brute-force search with an evaluation function (minmax algorithm) to decide on its move. This is not how most ...