Search found 333 matches

by noobpwnftw
Sat Aug 03, 2019 4:47 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

One principle has to be noted that the score of a move provided only makes sense to those of the moves on the very same position.
The database handles aggregation of scores on subsequent lines internally and it does not follow mini-max calculation.
by noobpwnftw
Fri Aug 02, 2019 9:53 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

How was the "winrate" for each position determined? I suspect it is logistic function based on score. The score is from "the scores been back-propagated using a weighted averaging function" see first post of this thread. In javascipt when winrate is missing (by design) for mate scores, I use // 201...
by noobpwnftw
Fri Aug 02, 2019 4:43 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

Thanks. Nice idea, to automate the creation of an opening book. Unfortunately, depth 22 is way too low to provide a reliable foundation, since most of the leaf positions are quiet and positional in nature. Unfortunately, such a data set which is better in both quality and quantity does not yet exis...
by noobpwnftw
Fri Aug 02, 2019 3:28 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

How was the "winrate" for each position determined? I suspect it is logistic function based on score. The score is from "the scores been back-propagated using a weighted averaging function" see first post of this thread. In javascipt when winrate is missing (by design) for mate scores, I use // 201...
by noobpwnftw
Fri Aug 02, 2019 2:31 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

My API endpoint supports HTTPS, so you could just change the base URL and get rid of the unsafe script warnings.
by noobpwnftw
Thu Aug 01, 2019 5:28 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

Ferdy wrote:
Wed Jul 31, 2019 12:50 pm
How do I know if positions from the run are saved in cloud?
It will be there, just currently the DB has a very long queue, need a while to process them.
by noobpwnftw
Wed Jul 31, 2019 7:48 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

finally there exists a "Discover" program people can run, which loads any UCI-compatible engine and play games, contributing moves encountered during the process. I tried to compile ChessDBDiscover and it seems to work. Created an engine dir and put engine.exe, a renamed stockfish dev engine, then ...
by noobpwnftw
Wed Jul 31, 2019 7:45 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

the back-propagation algorithm came up with the scores in the first place, one shouldn't try to put chickens back into eggs But if 10...Qc7 eventually leads to a score of 0.00 while 10...O-O leads to a score of -0.05 and 10...Nb7 leads to a score of -0.02, against white's best play, surely Qc7 shou...
by noobpwnftw
Wed Jul 31, 2019 3:10 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

My scores are evaluations of moves at current position, in relation to those of other moves of the same position, they have no meaning to any subsequent positions their corresponding moves may lead to(the back-propagation algorithm came up with the scores in the first place, one shouldn't try to put...
by noobpwnftw
Wed Jul 31, 2019 12:43 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 10213

Re: Database snapshot

Ferdy wrote:
Tue Jul 30, 2019 2:45 pm
See there is no 'winrate'. Its winrate should have been 0.0 assuming winrate has a range [0, 100], %.
There is no winrate field for mate scores or exact TB scores(not yet available). It is by design.