Author: Robert Hyatt
Date: 11:47:39 09/04/02
Go up one level in this thread
On September 04, 2002 at 14:37:15, Vincent Diepeveen wrote: >On September 04, 2002 at 14:18:38, Vincent Diepeveen wrote: > >another problem of your measuring speedups is that you cannot >compare your own speedups on different positions even. There >are 2 reasons: > > a) the first position you start with a cleaned hashtables the > others you do not So? the first position out of book is necessarily going to have a clear hash table. Or not, if we are running in "tournament mode". You do know about "tournament mode" in crafty and Cray Blitz? Where it computes the set of known book moves, and then ponders from the rest so that if the opponent plays an obvious (and not book move) we at least have a running start on the computation. You did know about that, right? I have explained it in the past. The idea came from HiTech... and Murray Campbell and has been in Crafty forever... > b) positions where previous move you mispredicted the move > the speedup is not comparable with predicted moves. In fact > it's unclear even whether you add to it the time you searched > in permanent brain. So what. It is about the speedup in situations that happen _in_ _the_ _game_. Some moves are predicted correctly. They may (or may not) speed up better than those that are not predicted correctly. But since both happened in the _real_ game, the mixture certainly represents what happened in that game. I explained my setup. You could reproduce the test using your program if you wanted. Not that it would be particularly fair, since the positions in the game were chosen by Cray Blitz and not your program, and your program might not like them or handle them as well... > c) because of the opponent move 1 gets played after x time, move 2 > after y time. In short it is not possible to make a scientific > compare from it > It is certainly possible to do so, because I did it. If I did it, anybody can do it. Yes, it is more difficult to do. But I don't consider difficult to be a synonym for impossible. You ought to try that sometimes. By the way, I now notice all this flapping you are doing has finally convinced a tropical storm to form in the Atlantic/gulf region. I _knew_ that was going to happen.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.