The evaluation of a given position

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chess win expectancy by material difference table or calculator

Houdini Chess engine is said to have a calibrated evaluation in which engine scores correlate directly with the win expectancy in the position. A +1.00 pawn advantage gives a 80% chance of winning the ...
4
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1answer
106 views

How to handle resignations from unlost positions when learning?

I played a game against bemeurer, a friend of mine who's learning chess. He's only got me to play against but he's learning quite quick. Of the 8 games we played so far, I won all of them. Most quite ...
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1answer
53 views

Database of analysed positions with corresponding scores

I am looking for a database with many various chess positions with a corresponding engine score. Something like (position, score): 6r1/3k4/4b1rB/p2p1R2/1pp5/8/PP5Q/7K w - - 1 39 1.25 rn2nrk1/...
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1answer
155 views

When evaluating score of new position with UCI chess engine is the Hash used at all?

I am using a UCI chess engine (stockfish 6) to evaluate the score of specific positions from different games. On this stockfish help forum thread it states: Hash size is the amount of memory you want ...
2
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1answer
178 views

Extracting features from chessboard

So i am implementing an intelligent chess agent with the use of reinforcement learning.I intend to use Java. After reading the master thesis of H.Mannen i decided to use some of the features listed ...
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1answer
64 views

Continuous evaluation of engine in ChessBase

I just bought ChessBase 13 and downloaded Stockfish, but when I am analyzing my games there is no continuous evaluation of the moves. So say I make 3 extra moves, the engine is still calculating the ...
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4answers
170 views

recommend a book on mid-game plan and board evaluation

Could someone recommend a book on mid-game strategy please? Things I am especially interested in are Make plans (and foresee opponents plan and stop it) Evaluate current position Evaluate ...
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1answer
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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3answers
132 views

What does autopilot mean in chess?

I've seen people saying things like "from now on this is just autopilot" or "autopilot from move 20"
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6answers
625 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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1answer
213 views

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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2answers
261 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 it'...
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1answer
231 views

Why is b4 the only move suggested by every chess engine?

The only move suggested here by every chess engine is 17. b4 Can anyone please advise why is it so important? [fen "r3k2r/ppp2pp1/7p/3pP3/3P2b1/5N2/RP1KBPPP/7R w - - 0 1"]
2
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2answers
560 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 ...
2
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1answer
237 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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2answers
481 views

Evaluating Elo rating on a per move basis

I've been a Chess.com user for a little over 3 years now. I play EVERY day, usually have anywhere from 10 to 50 games going on any single day. Since I've started, my rating has only gone up about 150 ...
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1answer
226 views

Looking for a chess program that evaluates my playing and adapts its level to it

As the title of the question says, I'm looking for a chess program that evaluates my playing and adapts its level to it. Maybe Lucas Chess does this (it's said that it does), but I found the tips of ...
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2answers
376 views

understanding evaluation function

I am developing a chess program. And have made use of an alpha beta algorithm and a static evaluation function. I have successfully implemented both but I want to improve the evaluation function by ...
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3answers
793 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 ...
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1answer
2k views

Is there an easy way to detect draw in King + Pawn vs King endgame?

I know the basics of opposition, but I am struggling to evaluate position for drawness in King + Pawn VS King endgame. A lot of time it is useful to know whether you should make an exchange. For ...
2
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1answer
76 views

Could you explain me this part of GM Larry Kaufman's article on “The Evaluation of Material Imbalances”?

This is a stupid question that has more to do with English than with chess, so if other people also think it's stupid I can delete it after I get the answer. Since English is not my mother's tongue I ...
2
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2answers
330 views

The Knight is stronger in Rapid/Blitz than it is in classical time controls. How many centipawns does the Knight gain in Rapid and in Blitz?

In blitz, the knight is stronger than the bishop. - Vlastmil Hort I am using this point value system for classical time controls (at least one hour per player): Pawn = 1 Knight = 3.25 Bishop = 3....
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2answers
395 views

Does GM Larry Kaufman's “principle of the redundancy of major pieces” truly exists? Or could this effect be caused by the number of Pawns instead?

The following is an extract from The Evaluation of Material Imbalances by GM Larry Kaufman. I put in bold characters everything that was important for this question. https://www.chess.com/article/...
2
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1answer
602 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
317 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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1answer
261 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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3answers
406 views

What's the difference between a tempo and a tempi? At the start, how many tempo/tempi is White up? On average, how many tempo/tempi is one Pawn worth?

What's the difference between a tempo and a tempi? At the start, how many tempo/tempi is White up? Half, one, or two? At the start of the game (before White has even made his first move), how many ...
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5answers
709 views

What are the first moves chosen (White), by brute force chess engines?

Title says it all. Feel free to add comment, theory, or explanation. Just to clarify, this is only regarding turn 1 of White, and no proceeding turns after it.
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2answers
762 views

Is this endgame winnable(for White)?

I ran into this position during play with computer, but I'm not sure if its winnable (I'm, White). Also, any comments on my play/computer's play would be highly appreciated. I'm not sure how to use ...
4
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2answers
657 views

I would like to know if this game is winnable for black?

Black to move but unsure of the pieces that would give black a better advantage. Any help would be greatly appreciated. r5k1/pp1qpr1p/3p2p1/2pP4/1n2P3/1P2N1Pb/2PQ1P1P/3RR1K1 b - - 0 1
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4answers
3k views

How to automatically evaluate a player's performance in a game?

Suppose I have a completed game. I don't have Elo ratings of the players. My purpose is to evaluate a player's performance in the game based solely on his moves. Can this can be done automatically ...
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12answers
45k views

How many points is each chess piece worth?

I am a beginner at chess; please answer this for me: How many points is each chess piece worth?
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4answers
466 views

How to gauge someone's chess strength quickly?

I plan on teaching a chess class (5 classes in a sequence, each building off the previous, 1 hour each) to high schoolers, with emphasis on applying chess principles to real life. Now, it'll be ...
10
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4answers
2k views

Why do chess engines sometimes miss good moves (or take forever to spot)?

It is not the first time that I found a greatly superior move than the chess engine did, it even takes them a while to understand these moves after you make them. For example, the move 15 ... Bf2 in ...
9
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5answers
2k views

Computer evaluations: How trustworthy are they?

Fritz 12 with Rybka gave a friend of mine an evaluation of +3 for white in this endgame position, which turned out to be a draw. But I've heard that +3 from a computer means a guaranteed win with ...
8
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1answer
226 views

Elements to take into account when evaluating 'board strength'

As part of a demo for a rules engine I'm dreaming up, I'd like to do an evaluation of a chess board that communicates each side's general strength at that point in time. Advanced things like ...
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5answers
4k views

What is an accurate way to evaluate chess positions?

I've been interested for a while about a computer chess AI algorithms (and got the chance to work on one at some point) like Minimax, and as the core component of these algorithms is the so-called ...
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5answers
1k views

What proofs for refuted gambits are there?

I've stumbled upon this article a while ago, and I've also seen refutations for the Muzio Gambit (Joseph Kling & Bernard Horwitz - Chess Studies on Endings of Games). I'm wondering what other ...