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Questions tagged [depth]

Relating to the analysis depth of a chess engine

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I have a simple code which has a bug at the particular place given below, but I'm unable to detect it exactly and fix it

I have asked a similar question elsewhere and I have detected where roughly is a problem. It is in this function which gets processed for node "1" only, see the output section below: (I'm ...
user2925716's user avatar
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Comparing evaluation from position after white move to position after black move?

I'm coding a chess engine and have the following problem: I want to only evaluate if the position is quiet, meaning if one side takes a piece the depth should grow by one ply. If then the other party ...
Paul's user avatar
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1 answer
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What does it mean if Stockfish's analyze's depth is well over 1 like 49/43?

What does it mean if Stockfish's analyze's depth is well over 1 like 49/43? My understanding was that the first number shows the number of half-moves that are always checked and the 2nd [usually ...
Rasmus's user avatar
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2 votes
1 answer
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How to set depth of GNU chess in winboard?

I have downloaded GNU chess 5.07 in windows 10. I am running it in winboard 4.8.0. When I start GNU chess in winboard, it plays with full strength. However, I want to set particular depth and want ...
ramanujan's user avatar
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Why do Engines show a fraction for the "Depth" and "Current Node" values?

Forgive me if this has been asked elsewhere, but I've both Googled and searched here at CSE and cannot find an answer. When I'm using an Engine for analysis (in this case, Stockfish 15), I've noticed ...
MikeMitchell's user avatar
8 votes
1 answer
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Why does stockfish move quality increase non-monotonically with increasing depth? -- selected moves at depth 3 are worse than depth 1

I have been working on a project looking at how stockfish moves change with increasing computation time (here search depth), and have found something peculiar - namely that the quality of moves that ...
Evan Russek's user avatar
1 vote
4 answers
606 views

For fixed-depth search, how much is the efficiency different between odd and even moves?

If a chess engine calculates in even depth, in the final position, it has to move again, whereas if it calculates at the odd depth, then the opponent has to move at the end of calculation (ignoring ...
Ferazhu's user avatar
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Why does it take stockfish depth 35 to find mate in 7?

My underlying question here is: What is depth? I know depth is supposedly the number of half-moves or plies from the starting position that it has calculated, in at least one line. But I feel this ...
Herman's user avatar
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12 votes
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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 ...
Ropdup's user avatar
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4 votes
3 answers
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Stockfish depth calculations

I'm using Stockfish to analyze my blunder filled games for blunders. Let's say you send stockfish a FEN for a position and then calculate to a given depth ... position fen the-starting-position go ...
honkskillet's user avatar
4 votes
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Is there a mathematical way to determine whether going to depth n+1 would be x% likely to recommend the move at depth n?

I have a chess GUI which I've recently been updating to do preemptive searches (that is, depth searches for all possible opponent moves) that I'd like to speed up, since the bot searches go to at ...
Joshua Harwood's user avatar
15 votes
3 answers
5k views

How does engine strength scale with hardware?

Say I run Komodo on my 4-core machine. How much stronger would Komodo be if I used an 8-core machine? A 40-core machine? A 4000-core machine? Is there a general relation for this? Also, does this ...
Allure's user avatar
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13 votes
3 answers
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What is 'Depth' in Lichess game analysis?

I have started analyzing my games in Lichess. I'm wondering what does Depth mean in the Stockfish analysis?
supermario's user avatar
3 votes
2 answers
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Why continue to increase search depth after mate is found?

Playing with test sets, several times I come across a behavior of the chess engines which I can't understand: Let's say I have the endgame [FEN "8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - - 0 1"] which after ...
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1 answer
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Do chess engines really prune more than 90% of branches?

I was looking at Fritz Online (https://fritz.chessbase.com/) engine's parameters/performance. Here is screen relating to one of made moves. It means that there was a general depth equals to 15 but ...
stanwar's user avatar
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4 votes
1 answer
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Stockfish is cheating?

I am using the Arena GUI to run Stockfish. I set up the following position. [FEN "r2q1rk1/2p1bppp/p1n5/1p1pP3/3Pn3/1P3N1P/1P3PP1/RNBQR1K1 w - - 0 11"] [SetUp "1"] At a search depth of 16 half moves ...
Wais Kamal's user avatar
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