Search found 178 matches

by Harald
Thu Mar 08, 2012 8:45 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Database storage methods
Replies: 37
Views: 7722

Re: Database storage methods

The discussion would not be complete without this link: http://www.gotw.ca/gotw/072.htm "Data Formats and Efficiency. How good are you at choosing highly compact and memory-efficient data formats? How good are you at writing bit-twiddling code? This GotW gives you ample opportunity to exercise both ...
by Harald
Sat Jan 21, 2012 2:49 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Rounding
Replies: 44
Views: 8814

Re: Rounding

Here is a reason why centi pawns and milli pawns are ok but a finer resolution is not: If you sum up the score af all pieces that are allowed for one side then you get something like 9Q + 2R + 2B + 2N +K vs k or 9*1000 + 2*600 + 2*400 + 2*400 + 0 == 11800 milli pawns. You can even add big positiona...
by Harald
Sat Jan 21, 2012 8:43 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Rounding
Replies: 44
Views: 8814

Re: Rounding

Here is a reason why centi pawns and milli pawns are ok but a finer resolution is not: If you sum up the score af all pieces that are allowed for one side then you get something like 9Q + 2R + 2B + 2N +K vs k or 9*1000 + 2*600 + 2*400 + 2*400 + 0 == 11800 milli pawns. You can even add big positional...
by Harald
Thu Jan 05, 2012 8:10 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Creating Books from .PGN files
Replies: 36
Views: 6845

Re: Creating Books from .PGN files

Perhaps this post has some examples for parts of this thread: http://www.talkchess.com/forum/viewtopic.php?t=17791&highlight=python In fact I have memory issues for files > 4Mb, I have to rethink my loading strategy because I created a vector for strings for each game, so either I have a memory lea...
by Harald
Mon Dec 26, 2011 8:19 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Creating Books from .PGN files
Replies: 36
Views: 6845

Re: Creating Books from .PGN files

Perhaps this post has some examples for parts of this thread:
http://www.talkchess.com/forum/viewtopi ... ght=python
by Harald
Wed Oct 05, 2011 5:52 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: multi-player games thoughts
Replies: 34
Views: 4132

Re: multi-player games thoughts

Would it help to play against the maximum of the opponents evals?
Evaluate each player (A, B, C) individually (ea, eb, ec).
Then the real score seen from player A is ea - max(eb, ec).
Perhaps this idea is somehow useful.

Harald
by Harald
Wed Sep 07, 2011 6:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: ChessLive!
Replies: 5
Views: 1364

Re: ChessLive!

Hi: Some chat lines: [HLTester] Test line 1 [HLTester] Very nice and works fine. [HLTester] Standings table is not wide enough. [HLTester] Chat window does not resize with browser window. [Anonymous991] Trying message without alias. [HLTester] Strange timing of Ayito move 79-81 vs Rotor [HLTester] y...
by Harald
Mon Feb 21, 2011 8:34 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Print PV from TT
Replies: 3
Views: 1019

Re: Print PV from TT

Hi I have read somewhere that modern chess engines print their PV moves using stored moves during the search, from transposition table. What are arguments against this method, if any ? The normal PV from the triangular array may end after a few moves in a hash table hit. The PV may be extended usin...
by Harald
Fri Jan 28, 2011 4:59 pm
Forum: Computer Chess Club: General Topics
Topic: I was curious about the fuss over Fruit...
Replies: 34
Views: 8497

Re: I was curious about the fuss over Fruit...

Well, to build WinBoard we actually do not use MINGW, but gcc under Cygwin, with the option -mno-cygwin. But to my understandig this would be equivalent. The point is that gcc does not complain about %lld, if it matches a 64-bit parameter of printf, as this is standard ANSI. But when at run time yo...
by Harald
Sat Nov 20, 2010 8:28 pm
Forum: Computer Chess Club: General Topics
Topic: Is "WinBoard look" obsolete?
Replies: 32
Views: 5638

Re: Is "WinBoard look" obsolete?

My opinion is not very important because I don't use Winboard and Arena very often. My main work was/is testing my own engine and sometimes have a look at PGN games. For me the engine interface is more important than the user interface. My problems and observations with the GUIs are: - Winboard look...