Search found 16848 matches

by bob
Thu Apr 26, 2007 4:20 pm
Forum: Computer Chess Club: General Topics
Topic: Eigenmann Endgame Test: Deep Sjeng, Crafty, Nimzo a.o.
Replies: 4
Views: 2426

Re: Eigenmann Endgame Test: Deep Sjeng, Crafty, Nimzo a.o.

can you tell me what hardware you are using? I have posted this previously, but again, running on my dual-core 2.0ghz core-2 laptop, I get this using no endgame tables: total positions searched.......... 100 number right...................... 73 number wrong...................... 27 percentage right...
by bob
Wed Apr 25, 2007 7:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Compiling Crafty
Replies: 21
Views: 9843

Re: Compiling Crafty

Then something is broken. Unitialized global variables are supposed to be initialized to zero automatically. What compiler are you using??? I'll make sure everything in "shared" is initialized, but that should already be done.
by bob
Sat Apr 21, 2007 9:51 pm
Forum: Computer Chess Club: General Topics
Topic: hard position
Replies: 10
Views: 6060

Re: hard position

Dann, you are confounding my poor brain. :D You and Robert Yatt said that the best move is anyone that wins the game, and Qxg7 wins. Paulo Soares Two different issues. For any given position, I believe that any move that wins the game is a "best move". But for a test position, it is far better if i...
by bob
Tue Apr 17, 2007 6:37 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Material imbalance evaluation
Replies: 10
Views: 13758

Re: Material imbalance evaluation

Thanks Mark, it seems SCID will do the work just fine! :-) I completely agree. You need a _random_ same of games played where N for PP trade occurred. Not just a sample of games humans played where the players were good and they only played the sac when they had a strong positional edge after doing...
by bob
Mon Apr 16, 2007 4:22 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Material imbalance evaluation
Replies: 10
Views: 13758

Re: Material imbalance evaluation

I completely agree. You need a _random_ same of games played where N for PP trade occurred. Not just a sample of games humans played where the players were good and they only played the sac when they had a strong positional edge after doing so.
by bob
Mon Apr 16, 2007 4:16 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Compiling Crafty
Replies: 21
Views: 9843

Re: Compiling Crafty

That should be all you need. Sounds like it is somehow getting the wrong type of time value. Hopefully someone that compiles under windows can speak up...

GetTickCount() should work correctly, and NT_i386 makes it use that...
by bob
Tue Apr 10, 2007 6:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Enhanced Transposition Cutoff
Replies: 6
Views: 8616

Re: Enhanced Transposition Cutoff

Hi. I've just added ETC to my engine. However my gains are very minor; about 1% less nodes and a fraction faster on a set of mate-in-4 problems. So naturally I would like to know what kind of improvement other authors are seeing by implementing ETC. Also which free source engines have implemented E...
by bob
Mon Apr 09, 2007 8:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: LMR in micro-Max
Replies: 17
Views: 35533

Re: LMR in micro-Max

I suggest you re-run your test several times. You might be amazed at the built-in randomness caused by simply using time as the stopping criterion.
by bob
Mon Apr 09, 2007 7:12 pm
Forum: Computer Chess Club: General Topics
Topic: Test Position
Replies: 12
Views: 11043

Re: Test Position

Crafty likes Rf6 instantly and the score climbs each iteration. Looks completely fatal for black.
by bob
Thu Apr 05, 2007 7:20 pm
Forum: Computer Chess Club: General Topics
Topic: WCCC 2007
Replies: 24
Views: 27378

Re: WCCC 2007

The ICGA is in the final stage of negotiation for organizing the WCCC 2007, the 12th Computer Olympiad, and an accompanying scientific workshop . The events would take place in Amsterdam, The Netherlands at the end of June / beginning of July 2007. Further details will be announced as soon as possi...