Search found 3626 matches

by Henk
Wed May 29, 2013 7:27 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is LMR Sound.
Replies: 102
Views: 16932

Re: Is LMR Sound.

Well if LMR checks the move on level n which gives a value of losing 0.1 pawn but on a level deeper the move wins a piece, LMR will think that the move is losing 0.1 pawn, so it misses that move.
by Henk
Wed May 29, 2013 7:15 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is LMR Sound.
Replies: 102
Views: 16932

Re: Is LMR Sound.

I meant worse than playing without LMR. But I cannot prove that. I can only say that it misses the best move.
by Henk
Wed May 29, 2013 7:08 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is LMR Sound.
Replies: 102
Views: 16932

Re: Is LMR Sound.

Ok, move ordering saves time but the sort operation on moves costs time. So somewhere there must be balance. For example if the first move is the best move than sorting the remaining moves makes no sense.
by Henk
Wed May 29, 2013 7:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is LMR Sound.
Replies: 102
Views: 16932

Re: Is LMR Sound.

Does LMR work because the search depth increases which compensates the chance of missing the best moves. Or is it because playing the best moves is not that important, if it plays only good moves that is good enough. So why is LMR sound.
by Henk
Wed May 29, 2013 6:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is LMR Sound.
Replies: 102
Views: 16932

Is LMR Sound.

Actually I do not understand LMR. LMR depends on good move ordering. But good move ordering costs a lot of CPU Time. If move ordering is not perfect than the search depth of at least one move will be reduced while it shouldn't. If that move was the best move, than the program probably misses that be...
by Henk
Wed May 29, 2013 5:20 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Price List
Replies: 5
Views: 1872

Price List

Is there a price list of chess program features like: Implementing LMR costs X hours and gives Y ELO rating points. That would be nice to have. I think nobody likes to spend a lot of time on implementing features that don't give you any profit. I would also like to have such a list for playing style...