Search found 357 matches

by BeyondCritics
Sun Mar 08, 2020 11:51 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Strange sporadic speed limitation in engine running in Linux on Ryzen
Replies: 19
Views: 1733

Re: Strange sporadic speed limitation in engine running in Linux on Ryzen

Last time it happened, a reboot cured the slowness. Did you investigated that hint?E.g. before and after a test start "top" and check for irregularites, like high system load or a thread hogging the cpu. O try to boot into an older kernel. Or do some diagnostic system performance tests and check fo...
by BeyondCritics
Mon Mar 02, 2020 6:56 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Lost end-game
Replies: 4
Views: 698

Re: Lost end-game

This _should_ be a draw. But all depends. Playing a move like 39...g5 is defnitively asking for trouble. Common wisdom is, to stay quiet and trade as much pawns as possible, therefore 39...h5 is normally the move, followed by g6. Analyze it with a high class engine, it will give you answers quickly....
by BeyondCritics
Tue Jan 14, 2020 9:31 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Board adaptive / tuning evaluation function - no NN/AI
Replies: 20
Views: 2485

Re: Board adaptive / tuning evaluation function - no NN/AI

This reminds somewhat to Temporal_difference_learning.
Although you don't need to dive in that much if your main interest is chess programming. Then start with the Chess Programming Wiki.
by BeyondCritics
Mon Jan 06, 2020 2:12 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Stockfish score multiplication
Replies: 4
Views: 1016

Re: Stockfish score multiplication

Oops, there is still some error. Once again let M=2^16 constexpr Score make_score(int mg, int eg) { return Score((int)((unsigned int)eg << 16) + mg); } This first converts int16 values to their corresponding unsigned values modulo M, these are of course not uint16 values. Let us call that set SU. Th...
by BeyondCritics
Mon Jan 06, 2020 1:33 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Stockfish score multiplication
Replies: 4
Views: 1016

Re: Stockfish score multiplication

I will specify the way it works in a more relaxed, mathematically manner, glossing over implementation issues. If you grok that, you should be able to solve the C++ problems on your own. Let M=2^16, and define, as in C/C++: uint16 := {0,...,M-1} int16 := {-M/2,...,M/2-1} uint32 := {0,...,M^2-1} int3...
by BeyondCritics
Thu Dec 05, 2019 12:07 pm
Forum: Computer Chess Club: General Topics
Topic: Polugaevsky Variation, 10.exf6, 16...Qc7, 16...Bb7
Replies: 11
Views: 1261

Re: Polugaevsky Variation, 10.exf6, 16...Qc7, 16...Bb7

This position was specifically posted by me, because the alleged key move 26.h3 is not a "candidate move" for me, by far not. I understand that not everyone bothers that, so i must apologize for having asked for your time. When stockfish presented 23.h3... to me..., i was shocked, so i choose to inv...
by BeyondCritics
Wed Dec 04, 2019 6:20 pm
Forum: Computer Chess Club: General Topics
Topic: AlphaZero No Castling Chess
Replies: 106
Views: 9905

Re: AlphaZero No Castling Chess

Chessbase India has produced an interview, where Kramnik share his thoughts about Nocastling chess and demonstrates a beautiful Alpha Zero self play game.
by BeyondCritics
Wed Dec 04, 2019 10:01 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Ubuntu Shell file
Replies: 8
Views: 2006

Re: Ubuntu Shell file

Depending on what you want, an alias might help, e.g. in your ~/.bashrc : alias cdw='cd ~/my_working_dir' Keep in mind, that bash is always picky about quoting and whitespace. Then do logout/login or type bash if you want to test things and then try cdw on the commandline. Type help alias for short ...
by BeyondCritics
Sun Dec 01, 2019 1:20 am
Forum: Computer Chess Club: General Topics
Topic: Advent of Code 2019
Replies: 0
Views: 902

Advent of Code 2019

The Advent of Code programming contest is about to start.
I took part last year for the first time, using C++ but dropped out after having solved anything up to problem 9. :oops:
Well i think some humilating experience is expected, if you indulge in that matters. Maybe you would do way better?
by BeyondCritics
Fri Nov 29, 2019 2:44 pm
Forum: Computer Chess Club: General Topics
Topic: Polugaevsky Variation, 10.exf6, 16...Qc7, 16...Bb7
Replies: 11
Views: 1261

Re: Polugaevsky Variation, 10.exf6, 16...Qc7, 16...Bb7

Vinvin wrote:
Fri Nov 29, 2019 1:38 pm
On recent 16 cores, current SF should find h3 in less than 30 sec.
Why did you post it as a "challenge" ?
I believe you are just a patzer.
If you choose to play the ignorant, this is fine for me.