Search found 1206 matches
- Fri Jun 08, 2018 10:47 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: syzygy request for info
- Replies: 35
- Views: 11512
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...
- 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: 8296
- Tue May 15, 2018 11:48 am
- Forum: Computer Chess Club: Programming and Technical Discussions
- Topic: Root move sorting
- Replies: 4
- Views: 2155
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...
- 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: 4742
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.
- 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: 4742
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...
- 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: 4742
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.
I can provide more accurate data in a few hours.
- 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: 7917
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-...
- 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: 7917
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.
- 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: 3633
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.
- 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: 3633
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.