Search found 333 matches

by noobpwnftw
Mon Jul 29, 2019 8:11 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

Very interesting, thank you very much. One question: When I find a leaf in the tree (position after last given move not found) does it mean that this was evaluated with Stockfish depth 22 and no other analysis starting from that position was performed? Yes. As an anecdote: I played a Lichess blitz ...
by noobpwnftw
Mon Jul 29, 2019 1:44 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

Nice work, Noob. Sounds like you've got 35-40 million games in that database. Any word on the composition, i.e. % human, % engine? This work would be greatly improved with a custom GUI that included your evaluation data, the empirical WLD data (flawed though it may be) and information on who played...
by noobpwnftw
Sun Jul 28, 2019 4:35 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

My weighted averaging function also factors in the number of good reply moves so that it can tell the difference between different 0.00 lines and apply penalties accordingly, also gradually degrade sharp scores to prevent the back-propagation becoming fully min-maxed. Regardless of how you want to a...
by noobpwnftw
Sun Jul 28, 2019 2:12 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

For those who want to probe my database locally or for other unspecified reasons, here is a full database snapshot of my book project as of today: ftp://ftp.chessdb.cn/pub/chessdb/data-snapshot-20190728.tar The database contains about 3 billion unique chess positions, mostly connected to startpos, ...
by noobpwnftw
Sun Jul 28, 2019 2:09 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

analyzed by Stockfish with no less than 22 plies at terminal node Interesting, my private database uses depth 22 as well, looks like we found it to be optimal (depth 21 having considerably less quality, depth 23 being consirerably more slow) independently? I tried to probe from startpos with the fo...
by noobpwnftw
Sun Jul 28, 2019 7:10 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

In board unit above, if there are more than 3 empty spaces, the first unit is set to 8 and the next unit is the number of empty spaces minus 4.
And correction: turn is a 8-bit flag, instead of 1.
by noobpwnftw
Sun Jul 28, 2019 3:58 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

Binary FEN encoding has the following format: <board unit>...<board unit><turn><special unit>...<special unit> Where each board unit has a 8-bit value of: 0 = 1 empty space 1 = 2 empty spaces 2 = 3 empty spaces 3 = p 4 = n 5 = b 6 = r 7 = q 8 = unused to avoid ambiguity 9 = k a = P b = N c = B d = R...
by noobpwnftw
Sun Jul 28, 2019 2:57 am
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Re: Database snapshot

e2e4 15 (8) 2 ! (20-04) 50.61 This reads: <Notation of the move> <adjusted score>(<real score>) <rank> <rank mark> (<# of known reply moves>-<# of good reply moves>) <winrate> For rank, 2 > 1 > 0 where rank=2 means it is a preferred move, rank=1 means it is a good alternative, rank=0 means it's a b...
by noobpwnftw
Sat Jul 27, 2019 9:54 pm
Forum: Computer Chess Club: General Topics
Topic: Database snapshot
Replies: 76
Views: 9894

Database snapshot

For those who want to probe my database locally or for other unspecified reasons, here is a full database snapshot of my book project as of today: ftp://ftp.chessdb.cn/pub/chessdb/data-snapshot-20190728.tar The database contains about 3 billion unique chess positions, mostly connected to startpos, a...
by noobpwnftw
Sat Jul 27, 2019 12:31 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Selfplay training server
Replies: 7
Views: 1546

Re: Selfplay training server

So 1, how do you trust your contributors in their work, what's stopping them from submitting random junk instead? 2, do you have a plan to take in labeled data?