Search found 313 matches

by marcelk
Wed Aug 08, 2012 4:26 pm
Forum: Computer Chess Club: General Topics
Topic: a general moderation point ....
Replies: 29
Views: 2427

Re: a general moderation point ....

The IP button is a good moderation tool. Many times in the past a user would join up under some false name, create all sorts of trouble, get removed from the forum and then do it again, in some case MANY times. Also we have had cases (not in my mod term but others) of the same person creating 20 or...
by marcelk
Tue Aug 07, 2012 5:09 pm
Forum: Computer Chess Club: General Topics
Topic: Bookbuilding 101
Replies: 59
Views: 11211

Re: Bookbuilding 101

Hi All, I'm working on a book making utility. My general idea is: (1) Feed it a pgn file or files of decent quality to obtain moves and win/loss statistics for the various positions. (2) Use an engine to evaluate each book position for some specified time. Of course this could take days for a book ...
by marcelk
Sat Jul 28, 2012 10:39 am
Forum: Computer Chess Club: General Topics
Topic: The Internet World Computer Chess Championship
Replies: 127
Views: 28458

Re: The Internet World Computer Chess Championship

I don't think that answers the question. The question is: If I enter Ivanhoe, can someone else still enter FireBird? Or Robbolito? Or Ippolit? That is a good point, and I am unsure of an answer. Do you have any suggestions? A similarity test. Someone just emailed me that exact suggestion; do we exc...
by marcelk
Fri Jul 27, 2012 6:18 pm
Forum: Computer Chess Club: General Topics
Topic: The Internet World Computer Chess Championship
Replies: 127
Views: 28458

Re: The Internet World Computer Chess Championship

Peter Skinner wrote:
hgm wrote: I don't think that answers the question.

The question is: If I enter Ivanhoe, can someone else still enter FireBird? Or Robbolito? Or Ippolit?
That is a good point, and I am unsure of an answer. Do you have any suggestions?
A similarity test.
by marcelk
Wed Jul 25, 2012 8:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Some thoughts on QS
Replies: 115
Views: 18548

Re: Some thoughts on QS

In the 90s i was the big promotor of course of not using preprocessor engines. Bob joined me in that. With that we were initially the only ones. The only ones in promoting or in doing? Correct me if I'm wrong, but I believe preeval.c was functional in Crafty in one form or another from 1996 until a...
by marcelk
Sat Jul 14, 2012 10:46 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is there a reasonable number of pawn hash entries?
Replies: 10
Views: 2718

Re: Is there a reasonable number of pawn hash entries?

I don't know if someone has made any kind of statistical study to see how many different pawn formation is on average, or the max number seen, based on depth. I ask this because this would be a nice data in order to correctly allocate the pawn hash table size. I settled on 2**18 entries total with ...
by marcelk
Fri Jul 13, 2012 9:11 pm
Forum: Computer Chess Club: General Topics
Topic: The Moore's Law Moon Shot. Published by MIT
Replies: 2
Views: 1031

Re: The Moore's Law Moon Shot. Published by MIT

The computer industry's future depends on a behind-schedule technology that's proving tough to get working. http://www.technologyreview.com/files/88751/intel.asmlx616.jpg Next generation: A technician at ASML works on a prototype machine for manufacturing computer chips based on extreme ultraviolet...
by marcelk
Wed Jul 11, 2012 11:04 pm
Forum: Computer Chess Club: General Topics
Topic: IWFC 2012 - Cancelled
Replies: 9
Views: 1012

Re: IWFC 2012 - Cancelled

Peter Skinner wrote: I am cancelling IWFC 2012
Darn, the cluster I ordered for it just arrived yesterday.
by marcelk
Wed Jul 04, 2012 11:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: LMR Research
Replies: 21
Views: 5118

Re: LMR Research

You should not draw conclusions on a few test positions, rather over complete games, where the difference is not so big. I didn't say "test positions". I said "positions". He wrote "test positions", but said "positions" when typing the words. Learn to read and master some basic English vocabulary! ...
by marcelk
Mon Jul 02, 2012 10:18 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: LMR Research
Replies: 21
Views: 5118

Re: LMR Research

There are some programs which research after LMR if value >= beta, some if value > alpha, and some don't research at all. FF currently uses value >= beta, but I haven't tested this. This is why I ask if anyone else *has*. Something tells me that value > alpha is best, because it allows Cut-Nodes AN...