Questions tagged [ply]

Ply is half a move, e.g. 1.e4 is 1 ply. 1.e4 e5 is 2 ply. (http://en.wikipedia.org/wiki/Ply_(game_theory))

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5 answers
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Is there a word to count one moving by one player?

Is there a word to count one moving by one player? For example, the following series of moves: e4 e5 2. Nf3 Nc6 3. Bb5 a6 is counted as three moves. But if I want to denote "e4" as a unit ...
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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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3 votes
2 answers
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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 ...
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12 votes
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Does depth (number of ply) still matter once it is high enough?

This isn't real, just imagine this happening. Computer A is supercomputer. It can calculate 30 ply deep within 20 seconds. Computer B is supercomputer. It can calculate 15 ply deep within 20 seconds....
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