Search found 1206 matches

by ZirconiumX
Fri Jun 08, 2018 10:47 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: syzygy request for info
Replies: 35
Views: 7177

Re: syzygy request for info

Ronald's site on github appears to be gone now. Huh? Search me, the search is broken. Try this: https://github.com/search?l=C&q=syzygy&type=Repositories You're searching for a repository called syzygy. Ron's account is "syzygy1", and the repository name is "tb". The users tab brings up syzygy1 as t...
by ZirconiumX
Mon May 28, 2018 7:54 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney May
Replies: 24
Views: 4091

Re: On-line engine blitz tourney May

hgm wrote:
Sun May 27, 2018 9:39 pm
Dorpsgek lost connection after 7 rounds, and had to be forfeited.
XBoard segfaulted while I was asleep. Sorry for the inconvenience.
by ZirconiumX
Tue May 15, 2018 11:48 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Root move sorting
Replies: 4
Views: 1074

Re: Root move sorting

Fail soft scores are still fairly unreliable in my experience; just because a score can be outside the window doesn't always mean it is. Hyatt suggested root move ordering by node count, and I think it's worth trying out, but I would have to test. Printing root move ordering coincidentally helped me...
by ZirconiumX
Tue May 08, 2018 4:25 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Quad-bard vs bitboard : is it faster ?
Replies: 10
Views: 2466

Re: Quad-bard vs bitboard : is it faster ?

32-bit. 64-bit RPi - last time I checked - lacked things like processor reclocking which is found in the RPF kernel, and the RPF aren't interested in a 64-bit version.
by ZirconiumX
Mon May 07, 2018 8:12 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Quad-bard vs bitboard : is it faster ?
Replies: 10
Views: 2466

Re: Quad-bard vs bitboard : is it faster ?

This got sidetracked by the forum migration and me getting ill over the weekend. So, I ran a Perft benchmark (which admittedly isn't the whole story of a search, but it magnifies the important part). It turns out that a monochrome move generator is slightly faster: AMD FX-6300 @ 3.5GHz: Double-colou...
by ZirconiumX
Fri May 04, 2018 6:52 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Quad-bard vs bitboard : is it faster ?
Replies: 10
Views: 2466

Re: Quad-bard vs bitboard : is it faster ?

I don't have data on quad-bitboard versus octa-bitboard, but quad-bitboard engines require a monochrome board representation, and my own testing does show that those are slightly slower than double colour board representations.

I can provide more accurate data in a few hours.
by ZirconiumX
Mon Apr 09, 2018 5:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: No bishop magics with fixed shift 8
Replies: 17
Views: 3290

Re: No bishop magics with fixed shift 8

This line looks ripe for an OpenMP pragma, and the code looks to be thread-safe. You might find that helps. I think I spoke too soon; `refs` and `magic` are shared, and some bookkeeping that seems irrelevant is done. Still, your method of GNU Parallel works fine. EDIT: you could add `-flto -fwhole-...
by ZirconiumX
Mon Apr 09, 2018 5:31 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: No bishop magics with fixed shift 8
Replies: 17
Views: 3290

Re: No bishop magics with fixed shift 8

This line looks ripe for an OpenMP pragma, and the code looks to be thread-safe. You might find that helps.
by ZirconiumX
Sat Apr 07, 2018 6:14 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Dorpsgek Eve's Temptation 64-bit Gauntlet for CCRL 40/40
Replies: 12
Views: 1933

Re: Dorpsgek Eve's Temptation 64-bit Gauntlet for CCRL 40/40

But the expected improvement is outside the noise, which is what I'm worried about.
by ZirconiumX
Sat Apr 07, 2018 11:06 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Dorpsgek Eve's Temptation 64-bit Gauntlet for CCRL 40/40
Replies: 12
Views: 1933

Re: Dorpsgek Eve's Temptation 64-bit Gauntlet for CCRL 40/40

This is strange. The patches all tested as improvements, but the net result is a slight regression, even with the bugfix I found.