Search found 288 matches

by noobpwnftw
Thu Apr 11, 2019 6:39 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 588
Views: 104761

Re: 7-men Syzygy attempt

I am not quite clear what the purpose of this is.
I believe that is used to filter known worse moves at root given WDL information.
by noobpwnftw
Sun Feb 24, 2019 4:02 pm
Forum: Computer Chess Club: General Topics
Topic: Further development of Lc0: Lc1
Replies: 19
Views: 2434

Re: Further development of Lc0: Lc1

I believe there is a misconception that being totally "zero" would introduce no bias at all, for one, statistically sound priors may not be the true distribution of their outcome under perfect play, those will in turn get magnified in RL process, in that sense the final strength is limited one way o...
by noobpwnftw
Thu Jan 17, 2019 7:38 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

There! I meant Xiangqi tablebases, I have never wrote a generator for chess.
by noobpwnftw
Tue Jan 15, 2019 12:06 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

They are time taken for each separate step, DTM is a bit faster because it reuses WDL tables and DTC usually requires more iterations. Note that almost a half of the time are spent on compression because they will quickly become huge without it. You need also consider the time needed to decompress s...
by noobpwnftw
Tue Jan 15, 2019 1:21 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

KBNK on single thread:

Build DTC:
45ms
Build DTM:
30ms
WDL with compression:
22ms W:721B B:751B
DTC with compression:
16ms W:2748B B:3060B
DTM with compression:
24ms W:2746B B:3060B
by noobpwnftw
Mon Jan 14, 2019 2:37 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

Like you said, it just need more complicated to handle all cases. There aren't much difference in theory, consider this: My_Foul + My_Foul = Lose, My_Foul + Opp_Foul = Draw, Opp_Foul + Opp_Foul = Win, how to correctly define all of them are just specifics. The main point of that paper is to introduc...
by noobpwnftw
Mon Jan 14, 2019 12:08 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

And second, http://www.chessdb.cn/query_en/?4k4/9/9/9/9/9/9/4BR3/Cr7/4K1B2%20w The tricky part is to make DTM tablebases, where this secondary counter cannot exist. One easy way is to build DTC first, then use the secondary counter in distance propagation to ensure progression, but this will cause s...
by noobpwnftw
Mon Jan 14, 2019 11:19 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

In Xiangqi many cannon attacks are "discovered", also knights have blockers, so that method would need quite a few exceptions, and some optimizations can be done in the pre-move generator to differentiate quiet moves from those which are likely to produce checks, and for the rest, call in_check(), a...
by noobpwnftw
Mon Jan 14, 2019 2:41 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

Use a staged pre-move generator so that you do not need to call in_check() on quiet moves. This already sounds very suspect to me. Call in_check() while generating EGTs? None of my EGT generators does such a thing. It seems a complete waste of time. Of course, because you haven't wrote a generator ...
by noobpwnftw
Sun Jan 13, 2019 5:20 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Generate EGTB with graphics cards?
Replies: 29
Views: 3636

Re: Generate EGTB with graphics cards?

Use a staged pre-move generator so that you do not need to call in_check() on quiet moves.