Computer Chess Club Archives




Subject: Re: Is pondering unfair in engine matches on a PC?

Author: William H Rogers

Date: 07:43:02 02/20/01

Go up one level in this thread

On February 20, 2001 at 07:51:15, Leen Ammeraal wrote:

>On February 19, 2001 at 15:09:21, William H Rogers wrote:
>>On February 19, 2001 at 14:18:15, Leen Ammeraal wrote:
>>>On February 19, 2001 at 14:04:44, Mogens Larsen wrote:
>>>>On February 19, 2001 at 13:07:27, Leen Ammeraal wrote:
>>>>>Does that mean that, with pondering on, my program, which currently does not
>>>>>implement pondering, get less computer time than its opponent if the
>>>>>latter implements pondering?
>>>>Not necessarily. It's possible to switch off pondering with most programs.
>>>Yes, I know. That is why I had written "with pondering on" in my
>>>question above. If other people use my program in a match
>>>against others, the chances are that they will play with
>>>pondering on, with a big disadvantage for my program because
>>>it cannot ponder. So I am afraid, I cannot afford NOT implementing
>>>pondering, only so far I don't have a clue how to begin.
>>>Any help would be very welcome.
>>First take the best move that your program decided was best for the opponent,
>>then after you make your move, switch sides and make you opponents best move and
>>then calculate your possible reply to it. You must watch the keyboard for input
>>so that you will know when to stop. After the opponent has made his move, you
>>then compare it to the move that you guessed he would make, if it is the same
>>one then you can continue you depth, if not, then you start your normal search.
>>I hope that this makes sense, if not I'll try again.
>Thanks. There is one difficulty for me in what you are writing: how can I
>'watch the keyboard for input'? I use mainly VC++ (and sometimes gcc).
How do you normally query the keyboard for input, even when it's the opponets
turn? Use a seperate input/query subroutine to see if a key has been pressed, if
not then continue with your search.

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