Search found 327 matches

by noobpwnftw
Fri Mar 16, 2018 9:56 pm
Forum: Computer Chess Club: General Topics
Topic: So Alpha Zero was a hoax?
Replies: 72
Views: 10616

Re: So Alpha Zero was a hoax?

I understand we live in a world where falsehood is common. In my country we can't even trust on banks anymore (several curruption cases). But something must be true right? DeepMind looks truthfull/trusty. For once the games they made available. Also the pre-paper they published looks very convincin...
by noobpwnftw
Fri Mar 16, 2018 7:55 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero update
Replies: 266
Views: 51273

Re: LCZero update

jkiliani wrote: OK thanks, I guess I can't follow that discussion then.
The discussion was about the lack of variations played by Fine Art might because of some over-fitting and the engine will always fall for it as shown by the images, several games were identical and was done intentionally just to prove it.
by noobpwnftw
Fri Mar 16, 2018 7:31 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero update
Replies: 266
Views: 51273

Re: LCZero update

jkiliani wrote: Care to share what that specific Go engine and the specific weakness is?
Fine Art, discussions in Chinese here.
by noobpwnftw
Fri Mar 16, 2018 7:12 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero update
Replies: 266
Views: 51273

Re: LCZero update

One thing to mention about the NN approach is when it works it works, but when it doesn't, you usually can't fix it. There is an example in recent Go engines recreated from AG paper that would fall for some particular position every single time and the amount of training samples wouldn't be enough c...
by noobpwnftw
Fri Mar 16, 2018 6:43 pm
Forum: Computer Chess Club: General Topics
Topic: LCZero update
Replies: 266
Views: 51273

Re: LCZero update

Oh, I think we gave AlphaZero's attention-seeking too much reward already. Basically if some guy who had some achievement in chess programming is now saying that he can make an engine that have some fancy tech(or simply use large persistent TT) and then provide you a 100 game match result that it be...
by noobpwnftw
Fri Mar 16, 2018 5:47 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Some opening book design questions
Replies: 39
Views: 10409

Re: Some opening book design questions

An interesting result for Xiangqi is if you do some brute force book making with perft 5 and then roll out by only cutting nodes that had a score worse than max(-75, bestscore-40/(1+exp(-abs(bestscore)/10))) (a rook=1000, bestscore is of root position) with a 20-ply search and keep at least 5 moves,...
by noobpwnftw
Thu Mar 15, 2018 10:36 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 588
Views: 120334

Re: 7-men Syzygy attempt

Currently all work is about making sure the generator can produce correct results and the file format can hold them, since I don't want to find something broken in the middle of the building campaign... A quick example is this , the second part overflowed when building KQQQQPvK, luckily it caused cr...
by noobpwnftw
Thu Mar 15, 2018 4:59 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 588
Views: 120334

Re: 7-men Syzygy attempt

I found a problem(bug?) after raising the stats limit: Although later we need to raise the map to 16-bits for large DTZ compression, in the current pawn code the MAX_PLY is 768, so this array here written with [(MAX_PLY - 1 - DRAW_RULE) / 2] is overflowed. It does not seem to affect the correctness(...
by noobpwnftw
Wed Mar 14, 2018 4:16 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 588
Views: 120334

Re: 7-men Syzygy attempt

########## KRBNvKQN ########## White to move: 82339643740 positions win in 1 ply. 35481300 positions win in 2 ply. 7371661376 positions win in 3 ply. 22718329 positions win in 4 ply. 1110426155 positions win in 5 ply. 12023494 positions win in 6 ply. 338100894 positions win in 7 ply. 4723715 positi...
by noobpwnftw
Tue Mar 13, 2018 5:25 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-men Syzygy attempt
Replies: 588
Views: 120334

Re: 7-men Syzygy attempt

I will add my 16-bit permutation and compression code to github, but I will probably not have time before the weekend. Thank you, and I think it is possible to differentiate between file formats with the fifth byte in the header or just use another magic value. With your new 16-bit compression code...