Author: Tom Kerrigan
Date: 21:53:13 08/03/00
Go up one level in this thread
On August 03, 2000 at 22:42:11, leonid wrote: >On August 03, 2000 at 17:59:47, Tom Kerrigan wrote: > >>On August 03, 2000 at 17:31:04, leonid wrote: >> >>>On August 03, 2000 at 14:14:38, Tom Kerrigan wrote: >>> >>>>I have 3 search functions: >>>> >>>>root_search() >>>>search() >>>>quiesce() >>>> >>>>The first two are almost identical, except root_search has some extra stuff for >>>>the root of the search tree. >>> >>> >>>What exactly is the root search? Have the impression that we have identical way >>>of searching. If we start search, for instance, 8 ply deep and our search goes >>>down to the ply 1, so ply one is root ply? I have those plys 1 and two that are >>>different. >> >>If you search 8 ply deep, then you start out at ply=0, depth=8. This is the >>root. If you make 8 moves, then ply=8, depth=0. Then you're at a leaf. >> >>You're backwards on the terminology. > >Very funny but I used quit opposit numbers. For me "upper ply" was the ply that Think of it like a real chess game. 1. e4 e5 2. Nf3 Nc6 The first move (e4) is obviously at ply 0. It's not at ply 8 or whatever because you don't know when the game will end. So ply has to increase as you make moves. It's not strange at all. Search depth decreases as you make moves. >had in my program higher number and "lower ply" that had lower number. For me >search 8 ply deep start at number 7 and end at number zero. Will try in the >future to keep in mind this strange difference. > > >>>>Quiesce is not important to you, as you have no inclination to do a quiescence >>>>search. >>>> >>>>So yes, my program basically searches all plies the same way. >>>> >>>>In the endgame, my program usually searches between 800k and 1.1M NPS. (Pentium >>>>III/800) >>> >>>Never reached this in my program. >>> >>>Tom, do you have some special program, that you can send to me, and that will >>>permit me to send back here one doubtful position in graphics. >> >>You don't need a special program from me to post a position on CCC. People do it >>all the time. I believe you just preceed a FEN string with "[D]". > >It is much easier to make the mistake when you use other way to say the position >that in graphics. Once one of my friend gave me one program (he wrote it) for >this but I don't know any more where I have it. Recently, at the first of July, >I changed my address. Many things are still not on their usual places. I don't know what "other way" you're talking about, but I guess you mean FEN. You can probably make a program to generate FEN strings yourself in a few minutes, or you can write them out by hand. It's not hard. > >Before I came here, tried my position on Genius 4. It gave the same response as >mine. So everything must be correct. Probably other program (Rebel) use >different value for its pieces or do its search in a quick way. Just post the position and I will run it. -Tom
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.