Author: Robert Hyatt
Date: 06:35:12 07/22/00
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On July 22, 2000 at 08:46:25, leonid wrote: >Hello! > >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. > >Thanks for response, >Leonid. This is way too hard to answer directly, because it varies by program and by approach. My NPS doesn't change much, because of the way my move generator works. I have noticed that Ferret is just the opposite and speeds up significantly in the endgame. The question is, as the game progresses, how much work do you save when a piece comes off the board? IE it might be almost as expensive to ask "is there a white bishop to generate moves for?" as it is to actually generate those moves. In such a case, you won't speed up very much in endgames...
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