Search found 224 matches

by frankp
Thu Oct 15, 2020 2:45 pm
Forum: Computer Chess Club: General Topics
Topic: Fixing the LC0 imbalance defect
Replies: 2
Views: 712

Re: Fixing the LC0 imbalance defect

Superficially it seems that including the relevant opening positions (endpoints) in lc0 training should improve its performance in such positions, but then it would not be lc_zero. The alphaGo match against lee sedol demonstrated the potential for holes ('delusions', I think the team called them) re...
by frankp
Sat Oct 10, 2020 10:51 am
Forum: Computer Chess Club: General Topics
Topic: Final Release of Ethereal, V12.75
Replies: 146
Views: 25392

Re: Final Release of Ethereal, V12.75

htop showed just Ethereal running on chosen number of threads - taking >99.x cpu resource.
Umm.....

OK recompiled and seems fine.
Think I may have (previously) run 'profile' compile. Ouch.
by frankp
Sat Oct 10, 2020 10:25 am
Forum: Computer Chess Club: General Topics
Topic: Final Release of Ethereal, V12.75
Replies: 146
Views: 25392

Re: Final Release of Ethereal, V12.75

Not sure what I did wrong. Increasing threads slows down the search - time to depth and nps. (Ryzen 2700X stock.). ./Ethereal go depth 20 info depth 20 seldepth 31 multipv 1 score cp 41 time 12172 nodes 3253344 nps 267000 tbhits 0 hashfull 487 pv d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 a7a6 c4d5 e6d5 c1f...
by frankp
Fri Oct 09, 2020 1:58 pm
Forum: Computer Chess Club: General Topics
Topic: Final Release of Ethereal, V12.75
Replies: 146
Views: 25392

Re: Final Release of Ethereal, V12.75

Search improvements pretty much dominated chess for a long time (I am talking about 1980’s on-wards) through increasing computer speed and clever algorithms. The recent neural net innovations (in chess) showed how poor human implementation of evaluation in chess programs is (and perhaps also how poo...
by frankp
Sat Aug 01, 2020 10:19 am
Forum: Computer Chess Club: General Topics
Topic: SF-NNUE - failed to store learned nn.bin
Replies: 7
Views: 1098

Re: SF-NNUE - failed to store learned nn.bin

Yes, reducing the eval_save_interval saves the intermediate nets. But the final net still does not save. Progress at least. Guess the files I am using are just too small. //------------------------------------------------------------------------------------------------------------ setoption name Eva...
by frankp
Sat Aug 01, 2020 8:46 am
Forum: Computer Chess Club: General Topics
Topic: SF-NNUE - failed to store learned nn.bin
Replies: 7
Views: 1098

Re: SF-NNUE - failed to store learned nn.bin

Just cut-and-pasted the Readme commands - without understanding. See below. So ... eval_save_interval 250000000 Perhaps then did not have enough data for eval_save to be triggered. Loop=1M and validation 100k as a quick test "gensfen depth 2 loop 1000000 use_draw_in_training_data_generation 1 eval_l...
by frankp
Sat Aug 01, 2020 7:57 am
Forum: Computer Chess Club: General Topics
Topic: SF-NNUE - failed to store learned nn.bin
Replies: 7
Views: 1098

Re: SF-NNUE - failed to store learned nn.bin

Thanks for replying.
Nothing written anyway, as far as I can tell.
Repeated the process with the same result.
No idea what I am doing. Just following the readme receipe, so perhaps not a surprising result :)
by frankp
Fri Jul 31, 2020 11:26 pm
Forum: Computer Chess Club: General Topics
Topic: SF-NNUE - failed to store learned nn.bin
Replies: 7
Views: 1098

SF-NNUE - failed to store learned nn.bin

Downloaded the precompiled version of SF-NNUE and followed the receipe for producing a net - a small test run of 1M loops for the training data and 100k for the validation. All seemed to progress fine, but no net was stored in ./eval/final when the process finished. No idea why. The final output fro...
by frankp
Sun Jul 26, 2020 6:06 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish NNUE
Replies: 25
Views: 3208

Re: Stockfish NNUE

Tried a few things. None of which worked. File not found or wrong format error. But works in the console. ucinewgame does not seem to cause an attempt to reload the nn.bin file. Thanks for the help, but time for a rest. //---------------------------------------------------------------------- <scid g...
by frankp
Sun Jul 26, 2020 3:02 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish NNUE
Replies: 25
Views: 3208

Re: Stockfish NNUE

BTW I now have the same issue others have reported here. Stockfish_nnue works fine in a console, but I cannot persuade it to read the nn.bin file in either scid or python chess - even though the paths are definitely correct. (Not tried other gui, or Windows.). Just get a2a3 etc like others, presumab...