Author: Ed Schröder
Date: 02:20:14 01/04/03
Go up one level in this thread
On January 04, 2003 at 04:34:37, Uri Blass wrote: >1)It seems that Ed missed the following post >http://www.talkchess.com/forums/1/message.html?274444 Okay. >2)I have questions about the recapture extensions. > >a)I think that it is more simple to use > >HIGH = root_score+TABLE [current_depth]; > >static int TABLE 500,500,450,400,350,300,275,250,225,200,200,.... I suppose you can do it this way too, yes. >By this way you do not need to update high every ply but only calculate >it after recapture. Hmmm..., why make easy things complicate, it's only done one time when going one ply deeper in the tree at the very begining of the new ply, and when climbing back, meaning its costs are zero. >b)What do you mean by I_score >Is is the score after the recapture or before the recapture. I_SCORE is material value (plus PS values) of the current board position. >I think that it may be productive if you demonstrate by a diagram what is the >value of I_score. > >suppose you search from the opening position >1.e4 e5 2.Nf3 Nc6 3.Bb5 Nc6 Bxc6 dxc6 Where is the diagram :) >I guess that a recapture extensions is done. >Assume that the initial position has 0.00 evaluation. > >What is the value of high?(I am not sure if 2.5 or 2.25) ply 7 -> 2.50 ply 8 -> 2.25 ply 9 -> 2.00 >Ignore the fact that bishop and knight may have the same value. >Is piece_value depth the value of bishop or knight when the recapture extension >is done(I guess bishop)? I don't understand your question. >Is I_score the score before dxc6 or after dxc6? >Is I_score from the point of view of the side to move or from the point of view >of the opponent? Again, I_SCORE is material value (plus PS values) of the current board position. Ed >Uri
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