Author: William H Rogers
Date: 07:00:47 01/04/99
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On January 03, 1999 at 21:18:11, Leon Stancliff wrote: >Bob Hyatt, > >I think you could probably answer this question if anyone can. Do you know how >the rating increases with ply depth. I have seen a figure of 200 points increase >per ply. I do not believe this would be a constant figure. My Hiarcs 6 will >normally reach 7 ply and sometimes 8 ply in the middle game. Do you have any >kind of graph showing what might be expected with each ply increase from 4, 5, >6, 7, 8 or 9 plies in the middle game. Does the increase in rating decrease as >one moves to higher levels? In other words, do you get as more increase as you >move from 7 to 8 than you do from 8 to 9. > >If anyone else has information on this topic please feel free to add your >comments. I had asked this question early last year. Yes, at lower plys, the ratings go up by approximately 200 points, but the number gets much smaller at higher plys. This corresponds to doubling cpu speed. At some point, i.e. 9 plys or above, the next higher ply relates to a doubling of cpu speed. The trouble is that, at higher plys, even doubling cpu speed might not be able to complete the next highest ply as the number of nodes to be searched grows exponetially. Bill
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