Search found 3047 matches

by Sven
Tue Jun 19, 2018 8:44 pm
Forum: Computer Chess Club: General Topics
Topic: How do you post a game
Replies: 8
Views: 475

Re: How do you post a game

hgm wrote:
Tue Jun 19, 2018 5:25 pm
I don't think the problem is that it is not known how to do it.

It is more that none of the admins seems to be interested in doing it.
How many admins do we have (I know one)?
by Sven
Thu Jun 14, 2018 9:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: winboard time management
Replies: 16
Views: 620

Re: winboard time management

Two interesting thoughts : * it seems (I didn't check the source code) that winboard/xboard is thinking every string received on stdout (even starting with a #) is an issue if it contains "not found" inside. From the doc : In support of the -firstHost/-secondHost features, which allow a chess engin...
by Sven
Wed Jun 13, 2018 9:38 pm
Forum: Computer Chess Club: General Topics
Topic: Something goes wrong with lc0 since yesterday?
Replies: 35
Views: 2909

Re: Something goes wrong with lc0 since yesterday?

Hi, Can I ask how the ELO is calculated in the main branch? In the testserver: http://testserver.lczero.org/networks the ELO numbers look like they equate to real ELO However in the mainserver: http://lczero.org/networks the ELO numbers are too high to be real ELO Is there a formulae to work out th...
by Sven
Wed Jun 13, 2018 9:12 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: winboard time management
Replies: 16
Views: 620

Re: winboard time management

The first thing you should do is creating a winboard debug file and compare the timings for I/O with your log. From your log it is not clear to me when the searched move really is sent to WB. Yes, absolutely necessary since one possible reason for the loss on time is that WB did not receive a prope...
by Sven
Mon Jun 11, 2018 9:40 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Debugging a transposition table
Replies: 39
Views: 1610

Re: Debugging a transposition table

In all my newer engines I indeed do that. Only Joker searched on to the third occurence, and it gave nothing but trouble. It was mainly used to cause horizon effect by artificially reducing the search depth. If a superficially good forced action turned out to end in disaster at higher search depth,...
by Sven
Mon Jun 11, 2018 10:14 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Yet another tt issue
Replies: 11
Views: 402

Re: Yet another tt issue

Interesting. So, Sven, you only use the TT in zero-window/non-PV nodes? Also, what's the harm in using it at the root if the depth is appropriate, it's an exact type TT entry, and the score it holds is between alpha and beta? Feels like I've tried it every which way, and currently, I do use the TT ...
by Sven
Sun Jun 10, 2018 3:21 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Yet another tt issue
Replies: 11
Views: 402

Re: Yet another tt issue

Dear all, following a previous post about some TT issue (http://www.talkchess.com/forum3/viewtopic.php?f=7&t=67599), I started investigate my own implementation step by step. The current implementation is as follows (both at root and inside the tree): Storing : * tt_store at beta cut-off as bound_b...
by Sven
Sat Jun 09, 2018 4:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: PV test and PVS
Replies: 13
Views: 412

Re: PV test and PVS

And here comes the stupid question : how to implement PVS if score is float and not int ? This should be unrelated to PVS, you will have many places in your engine where you compare two scores. And here comes the stupid answer: just don't do it :-) Use integer scores representing centipawns, 1/256 ...
by Sven
Sat Jun 09, 2018 3:49 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: texel tuning
Replies: 9
Views: 833

Re: texel tuning

I reuse this thread for another Question related to Texel-Tuning: Suppose I have introduced a new evaluation feature and want to tune its parameters. Now the question: Is it important that at least one or even both engines that are used to generate the game data used for tuning do support this new ...