Search found 3210 matches

by Sven
Sat Jan 19, 2019 10:45 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney January
Replies: 19
Views: 667

Re: On-line engine blitz tourney January

Here are the Jumbo 0.6.96 games of this tourney. Round 8 was not played, the opponent was not present. [Event "ICS rated blitz match"] [Site "winboard.nl"] [Date "2019.01.19"] [Round "-"] [White "Jumbo"] [Black "Rookie"] [Result "1/2-1/2"] [WhiteElo "1537"] [BlackElo "1872"] [TimeControl "300+1"] [A...
by Sven
Thu Jan 17, 2019 9:55 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Swiss Tournament. Edition VII. Group B.
Replies: 4
Views: 188

Re: Swiss Tournament. Edition VII. Group B.

Hi Sergio, please update Jumbo to 0.6.96.
by Sven
Wed Jan 16, 2019 11:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Impact of Aspiration on tree size
Replies: 6
Views: 338

Re: Impact of Aspiration on tree size

I did some tests on several features of my engine (Java based) and was wondering if the impact of Aspiration search make any sense. My engine is still simple and uses AlphaBeta (fail-hard), PVS, TT, Null Move, Reverse Futility Pruning, Razoring, Mate Distance Pruning, Minor Promotion Pruning, Late ...
by Sven
Sun Jan 13, 2019 5:52 pm
Forum: Computer Chess Club: General Topics
Topic: Jumbo 0.6.96
Replies: 0
Views: 199

Jumbo 0.6.96

I have released a new Jumbo version: 0.6.96 In my testing with ultra-fast games it played about 30 Elo points stronger than the last release, 0.6.66.
by Sven
Sun Jan 06, 2019 10:05 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Writing bugs
Replies: 66
Views: 2412

Re: Writing bugs

if (x&1 != engine) continue; is bad C code, the x&1 only affects the flags. Just to make it clear for all those who are not fully aware of the consequences of this bug: the expression "x & (1 != engine)" is evaluated differently from the intended "(x & 1) != engine" if engine=1 and x is an even num...
by Sven
Sun Jan 06, 2019 9:44 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What's the best Lazy SMP logic?
Replies: 1
Views: 291

Re: What's the best Lazy SMP logic?

By the way, can anyone describe how Stockfish's parallel search works? It's not very clear to me. The basic approach is LazySMP. I'll try to explain what I understand (and as always, explaining also helps a bit in understanding more). Certainly a SF developer can do this much better, though. "Threa...
by Sven
Fri Jan 04, 2019 5:53 pm
Forum: Computer Chess Club: General Topics
Topic: Compling Stockfish on Windows 10-64bit using cygwin
Replies: 11
Views: 766

Re: Compling Stockfish on Windows 10-64bit using cygwin

Thanks for the link Tirsa. It works well. Off topic for Unix gurus (not me :(): How does the line unzip -v &> /dev/null || pacman -S --noconfirm unzip work in checking if unzip is installed and installing it if it is not? The "||" is a logical OR in the shell. If the "unzip -v" command fails it wil...
by Sven
Thu Jan 03, 2019 9:44 pm
Forum: Computer Chess Club: General Topics
Topic: SchaakMachine: Clear win
Replies: 11
Views: 1024

Re: SchaakMachine: Clear win

Indeed, adding noise in the root should not be done for mate scores. @Henk: do you add "noise" only in the root, or everywhere? I am not sure I understand your code. 'lb' and 'ub' are alpha and beta? The way I always do it is precompensate alpha and beta for the noise I am going to add. So noise = ...
by Sven
Wed Jan 02, 2019 7:28 pm
Forum: Computer Chess Club: General Topics
Topic: Compling Stockfish on Windows 10-64bit using cygwin
Replies: 11
Views: 766

Re: Compling Stockfish on Windows 10-64bit using cygwin

Did you try it with "COMP=gcc" (which is the default and can also be omitted)? Hi Sven It still gives the same errors with gcc. Which Stockfish version are you trying to compile? I had no problems to compile under CygWin with a recent dev version from 26-dec-2018. EDIT: for some reason the _WIN32 m...
by Sven
Tue Jan 01, 2019 9:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Syzygy probing code and Visual Studio
Replies: 3
Views: 439

Re: Syzygy probing code and Visual Studio

Have you tried to compile the probing code as C++? I guess the few necessary code changes might be done easier than finding a correct replacement for the non-existent "atomic" stuff.