Search found 16778 matches

by bob
Mon Apr 02, 2007 2:05 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SEE on non-capture moves in main search
Replies: 62
Views: 69760

Re: SEE on non-capture moves in main search

Then please cite a solution to the following problem. A hardware chess implementation is a finite state machine with a static cycle-time. So how are you going to implement a SEE that can do its thing in one cycle that is a constant-time thing? You can't. Either you stretch the cycle time out horren...
by bob
Mon Apr 02, 2007 1:57 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SEE on non-capture moves in main search
Replies: 62
Views: 69760

Re: SEE on non-capture moves in main search

MVV/LVA is the only viable solution when using special-purpose hardware. Clearly not. Then please cite a solution to the following problem. A hardware chess implementation is a finite state machine with a static cycle-time. So how are you going to implement a SEE that can do its thing in one cycle ...
by bob
Mon Apr 02, 2007 1:54 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Fantacising about a testing cluster!
Replies: 21
Views: 23639

Re: Fantacising about a testing cluster!

I want to be able to run a two month test for the most promising beta that is produced each week. So ten cpus should be enough. They should be as cheap as possible (celerons maybe) with no more than 256 MB each. I imagine that they all could connect to a main computer through a simple network that ...
by bob
Sun Apr 01, 2007 1:59 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SEE on non-capture moves in main search
Replies: 62
Views: 69760

Re: SEE on non-capture moves in main search

Can we stop with the blanket statements that are wrong? "no serious engine uses MVV/LVA". Let me name a few, from older to newer: (1) Belle (2) chiptest (3) deep thought (4) deep blue (5) dark thought (6) Hydra Well, so I left out the "anymore", obviously there has been a time when MVV/LVA was quit...
by bob
Sun Apr 01, 2007 1:51 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SEE on non-capture moves in main search
Replies: 62
Views: 69760

Re: SEE on non-capture moves in main search

Again, read _what_ I wrote. QxR wins a pawn (queen for 2 rooks). That is a winning exchange by SEE. It should _not_ be searched prior to RxN which wins a knight. Perhaps, but this particular case (which is not at all common in practise) is one of the very few cases where it is no longer possible to...
by bob
Fri Mar 30, 2007 9:32 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SEE on non-capture moves in main search
Replies: 62
Views: 69760

Re: SEE on non-capture moves in main search

For the non-capturing moves after the hash move and killers, history move ordering performs better than no move ordering, as expected. But trying to refine this by using SEE values does not work. I have tried to sort the moves into two groups, first searching non-captures with SEE value zero ordere...
by bob
Fri Mar 30, 2007 9:27 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SEE on non-capture moves in main search
Replies: 62
Views: 69760

Re: SEE on non-capture moves in main search

First, read the following sentence, quoted verbatim from Tord's comments: ===================================================== "However, among the winning and equal captures , MVV/LVA move ordering performs better than SEE move ordering, which is counter-intuitive to me. " ========================...
by bob
Fri Mar 30, 2007 9:12 pm
Forum: Computer Chess Club: General Topics
Topic: WCCC 2007
Replies: 24
Views: 25845

Re: WCCC 2007

Reread the charter, there's no such thing in it :twisted: Tony It must have been 'conveniently' rewritten then. It has become the European championship, in reality. Not that strong North American programs stay away in total, just that most of them do. It would make sense to me to rotate by continen...
by bob
Fri Mar 30, 2007 12:05 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SEE on non-capture moves in main search
Replies: 62
Views: 69760

Re: SEE on non-capture moves in main search

I have never seen that kind of result with MVV/LVA vs SEE. You can find old discussions on this topic on r.g.c.c back in the early 90's. I ran a bunch of tests and even distributed a version of Crafty where one could choose between SEE and MVV/LVA for q-search move ordering, and others ran lots of ...
by bob
Thu Mar 29, 2007 11:54 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Kibitz score reporting in server play
Replies: 16
Views: 15183

Re: Kibitz score reporting in server play

The idea of displaying a score from the program's perspective is more confusing and after a couple of years, most people decided that they liked the way Crafty displays scores. If you don't do it like this, how do you "annotate" a game with meaningful scores??? Because server play with one or two p...