Search found 2668 matches

by mcostalba
Mon Nov 03, 2008 12:57 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.0
Replies: 26
Views: 9936

Re: Stockfish 1.0

Hello Marco, Thanks for your work on Stockfish. I am currently running a test match (30 Games at a 25 minute time control) with it against Bright. Both engines are using Rybka 3 book. The computer is a Q6700. Both engines have a hash of 1024, and are only using two cores with ponder on. Here are th...
by mcostalba
Mon Nov 03, 2008 7:36 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.0
Replies: 26
Views: 9936

Re: Stockfish 1.0

How much stronger is it relative to Glaurung from your tests? Thanks Jim and Marco. Enough :D I really would like Stockfish to be tested by independent sources. It would be great if can be added to tournments gauntlets! I would prefer not to disclose ELO gain above Glaurung (and other engines) unti...
by mcostalba
Mon Nov 03, 2008 7:29 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.0
Replies: 26
Views: 9936

Re: Stockfish 1.0

Jim Ablett wrote:
Hi Marco,

Some Windows p.g.o compiles, x64 & 32 bit.

Image
StockFish 1.0 by Marco Costalba

http://www.mediafire.com/?jglej2ytyj3

Jim.
Thanks Jim, very much appreciated !!!

Thanks
Marco
by mcostalba
Mon Nov 03, 2008 7:27 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.0
Replies: 26
Views: 9936

Re: Stockfish 1.0

Hello Marco, I tried to compile Stockfish 1.0 on my Ubuntu 64-bit system and this was the result after modifying the Makefile to not use icpc and use g++ instead: roy@roy-laptop:~/chess/sf_1.0/src$ make g++ -DNDEBUG -Wall -g -O3 -fno-exceptions -fomit-frame-pointer -fno-rtti -fno-strict-aliasing -w...
by mcostalba
Sun Nov 02, 2008 1:11 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.0
Replies: 26
Views: 9936

Stockfish 1.0

This is Stockfish, an UCI engine derived from norvegian engine Glarung 2.1 Why Stockfish ? - It's a fish ;-) - It is produced in Norway and cooked in Italy. Indeed the biggest part of norvegian stockfish is exported in Italy where is lovely cooked. What has this stockfish more then Glaurung 2.1 ? We...
by mcostalba
Sun Nov 02, 2008 1:08 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Stockfish 1.0
Replies: 0
Views: 589

Stockfish 1.0

This is Stockfish, an UCI engine derived from norvegian engine Glarung 2.1 Why Stockfish ? - It's a fish ;-) - It is produced in Norway and cooked in Italy. Indeed the biggest part of norvegian stockfish is exported in Italy where is lovely cooked. What has this stockfish more then Glaurung 2.1 ? We...
by mcostalba
Mon Oct 13, 2008 6:02 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Increasing SNR with last seconds noise filtering
Replies: 2
Views: 736

Increasing SNR with last seconds noise filtering

A practical way to test a patch is to run a session of blitz one minute games between engines. I have observed that sometimes, the players arrive to the last few seconds in a condition where one engine is in a clear advantage, then suddendly, due to extreme time pressure, a blunders occurs and the a...
by mcostalba
Mon Oct 13, 2008 6:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Reducing testing time by patch combining leverage
Replies: 17
Views: 2467

Reducing testing time by patch combining leverage

It is known that there is a non-linear relation between the ELO difference of two engines and the number of games needed to prove that one engine is stronger then the other. If engine A is 100 ELO points stronger then engine B then, let’s say 100 games are enough to spot that A is stronger then B. I...
by mcostalba
Mon Oct 13, 2008 5:56 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: For the bit tweakers
Replies: 9
Views: 2173

Re: For the bit tweakers

Interesting, but when would you use an inverse square root in a chess engine, I don't think I use them in mine. But maybe proper use of an inverse square root is the main secret of Rybka's strength? :D You mean the fast sigmoid bending of eval terms on the game phase via RSQRTPS? ;-) . Nice to know...
by mcostalba
Thu Sep 25, 2008 4:07 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Superlinear interpolator: a nice novelity ?
Replies: 37
Views: 12288

Re: Superlinear interpolator: a nice novelity ?

I have seen many cases where A' beats A, but when played against other programs, it does worse. I have had 3-4 of those this week in making the new changes to Crafty's eval. Note that does worse is not enough and we need significant results to be sure that it is not because of a statistical noise w...