Search found 313 matches

by marcelk
Sun Jun 10, 2012 12:39 am
Forum: Computer Chess Club: General Topics
Topic: preprocessing by houdini1.5
Replies: 8
Views: 2870

Re: preprocessing by houdini1.5

Uri, you have a keen eye. The small difference in evaluation is due to Houdini's rescaling of the output to produce a score in "pawns", which is done based on the material value of the root position. Pawns get relatively more valuable near the end game, so the same material advantage in the end gam...
by marcelk
Sat Jun 09, 2012 7:17 pm
Forum: Computer Chess Club: General Topics
Topic: World Computer Chess Championship ?
Replies: 417
Views: 227005

Re: World Computer Chess Championship ?

hgm wrote:Rating lists have nothing to do with World Championships. Name me one sport where the World Champion is chosen based on rating lists.
Formula 1 is one example. Tennis is another.
by marcelk
Sat Jun 09, 2012 3:28 pm
Forum: Computer Chess Club: General Topics
Topic: World Computer Chess Championship ?
Replies: 417
Views: 227005

Re: World Computer Chess Championship ?

Now the first question that comes to my mind is to what "world" they refer in the title of the event ? Mars ? Underwater world ? Surely not chess engines landscape in 2011, this is clear even to the dumbest. So how they have the presumption to call this marketing event, for the only benefit of lega...
by marcelk
Tue May 29, 2012 4:49 am
Forum: Computer Chess Club: General Topics
Topic: test position
Replies: 4
Views: 635

Re: test position

easy for some 32...Ne3 [D] 8/p3rpk1/QnN3pp/1NRnpq2/3p4/P2P2PP/4PPK1/8 b - - On my laptop, 0.3 seconds for the move, and 1 minute for a positive score. time ply score variation 0.0 1 -1.257 Rd7, Nbxa7 0.0 2 -1.257 Rd7, Nbxa7 0.0 3 -1.192 Rd7, Nbxa7 Rc7 0.0 4 -1.190 Re6, Qxa7 Rf6, f4 0.0 5 -0.687 Re6...
by marcelk
Thu May 24, 2012 11:26 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Houdini 2.0c Pro x64 - Vitruvius 1.11C HEM x64 Match Results
Replies: 12
Views: 1191

Re: Houdini 2.0c Pro x64 - Vitruvius 1.11C HEM x64 Match Res

How did you find that move, Jon? It's a good one. Which engine did you use and how much time did you give it? I used Houdini 1.5a, and it found this pretty quickly. Maybe 2.0 is slower on this position? --Jon Very nice position, a very nice tactic! My program has a lot of trouble with it (on my lap...
by marcelk
Mon May 14, 2012 10:19 pm
Forum: Computer Chess Club: General Topics
Topic: Did Anand miss a win in Game 3?
Replies: 46
Views: 25080

Re: Did Anand miss a win in Game 3?

From the comment thread over at Chess Vibes http://www.chessvibes.com/reports/anand-gelfand-g3-a-3f3-gr%C3%BCnfeld-drawn-after-37-moves In the press conference, they analyzed a nice line that at the end with a rook sac and queen with check. This was 34.d7 Rcc2 35.Rc4 Rb2+ 36.Kc1 Rxa2 37.Rc8 Rf2 (Th...
by marcelk
Sat Apr 28, 2012 10:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Has anybody tried the Network Truncation Algorithms
Replies: 10
Views: 1977

Re: Has anybody tried the Network Truncation Algorithms

mcostalba wrote:Has anybody tried this ?

http://www.youtube.com/watch?v=YQF38qysPiE
howdini.com, isn't that recipe a rip-off?
by marcelk
Sat Apr 28, 2012 2:06 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Possible LMR improvement using AB_FOOL
Replies: 41
Views: 7272

Re: Possible LMR improvement using AB_FOOL

But in any case, LMR is about treating "later moves" differently since they are searched "later" for some specific reasons. But what are those specific reasons? A 4-ply exact value seems to be a better reason than an ordering based on losing/non-losing captures and maybe some killer info left from ...
by marcelk
Sun Apr 15, 2012 12:15 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Tom Kerrigan's TSCP deriivative : Tang project
Replies: 18
Views: 2310

Re: Tom Kerrigan's TSCP deriivative : Tang project

Well, actually 'open source' does mean access to the source code. It seems some people are now trying to hijack that terminology for there own purposes. Best ignore them... Oxford American Dictionaries hasn't ignored them: open-source adjective [Computing] denoting software for which the original s...
by marcelk
Sun Feb 12, 2012 10:49 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Possible Search Algorithms for GPUs?
Replies: 22
Views: 5472

Re: Possible Search Algorithms for GPUs?

Wouldn't doing chess engine work on the GPU: 1. heavily restrict the choice of computers that could run the code (or a particular compilation of it) 2. interfere with other processes that want to draw on the display (e.g. another window) Sure, but it also opens research on how to scale beyond 160 C...