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Subject: Re: Is the NPS tend to grow at the end of the game?

Author: Josť Carlos

Date: 06:20:23 07/22/00

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On July 22, 2000 at 08:46:25, leonid wrote:

>Is the nodes per second number tend to grow when program search position more
>advanced in the game? When there are less pieces on the board.
>I just speeded my program in around 30% and tried to find where my nps is now.
>Went to the Fritz 6 counter (Fritz engin inside of Hiarcs package) and was
>disappointed. Fritz still keep me at the safe distance at the end of the game.
>This is due to the strange (for me) fact that Fritz numbers goes up at the end
>of the game. This time in mine nps goes down. In mine program less are the
>pieces on the board, less efficency in the search of the legal moves. Wanted to
>see if there are some general tendency in all programs. Before asking here my
>question, went to see Rebel 10. Its numbers looks like to be very stable. No big
>difference between heavy initial and final positions. Once again difference with
>my program.

  My program (Averno) usually searches 300% faster (in nps) in the endgame. I
never have thought about it cause I saw it natural, but if I think a little, I
can give some reasons:

  - My evaluation in the endgame is easier (no king-safety code).
  - Less moves generated = less time spent generating moves. :)
  - Better use of trans/ref table (many more transpositions).

>Thanks for response,

  Hope this helps.

  Josť C.

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