Search found 259 matches

by jorose
Fri Aug 30, 2019 5:08 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: New Tool for Tuning with Skopt
Replies: 60
Views: 8520

Re: New Tool for Tuning with Skopt

Just wanted to mention I was successfully able to retune Winter's futility and static null move pruning margins with this tool. I measured a self play rating gain of +9 +- 3 Elo roughly.
by jorose
Tue Aug 27, 2019 8:54 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: New Tool for Tuning with Skopt
Replies: 60
Views: 8520

Re: New Tool for Tuning with Skopt

The game is limited to 160 plies. for ply in range(int(board.turn == chess.BLACK), 160): Good catch! I completely forgot I added that. I will change this to an optional user defined value, and otherwise just play till the fifty-moves rule decides it's time. Aside from draws getting recorded correct...
by jorose
Tue Aug 27, 2019 6:18 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: New Tool for Tuning with Skopt
Replies: 60
Views: 8520

Re: New Tool for Tuning with Skopt

So I am trying out your skript, but unfortunately it seems to not be counting threefold repetitions as draws. Is there an easy way to fix this issue?

EDIT: Ok I just checked the games, the issue is different than I thought. Games are adjudicating as undecided after just 85 moves?
by jorose
Sun Aug 25, 2019 2:28 pm
Forum: Computer Chess Club: General Topics
Topic: 29 Alpha-Beta's against Leela...
Replies: 62
Views: 10860

Re: 29 Alpha-Beta's against Leela...

Yes but they run around without any plan, They do enormous amounts of lines of play but have no clue what to do, That’s the reason the draw rate is increasing and increasing. Also most programs are clones of other programs, they make so many draws. Where is it good for ?? What is the sense of all t...
by jorose
Sun Aug 25, 2019 1:27 pm
Forum: Computer Chess Club: General Topics
Topic: 29 Alpha-Beta's against Leela...
Replies: 62
Views: 10860

Re: 29 Alpha-Beta's against Leela...

These are three different main lines, and they lead to three different games. I think 24... c3 leads the fastest to the goal ( = mobilisation of the rooks as quickly as possible) and is therefore clearly the best move in this position. In addition, it is the most interesting move here - and typical...
by jorose
Sun Aug 25, 2019 1:10 am
Forum: Computer Chess Club: General Topics
Topic: 29 Alpha-Beta's against Leela...
Replies: 62
Views: 10860

Re: 29 Alpha-Beta's against Leela...

According to Stockfish-dev, c3 and Rec8 are equivalent by transposition: Don't think so. I have received the following output in 3-variant mode (AMD Ryzen7-2700X - 16'384 MB): Analysis by Stockfish 280719 64 POPCNT 16CPU 1. -+ (-2.92): 24...c3 25.Sa3 Tec8 26.Sc2 Sb2 27.a3 h5 28.f3 hxg4 29.hxg4 Sc4 ...
by jorose
Sat Aug 24, 2019 7:11 pm
Forum: Computer Chess Club: General Topics
Topic: 29 Alpha-Beta's against Leela...
Replies: 62
Views: 10860

Re: 29 Alpha-Beta's against Leela...

I can't help but mention one issue I have with your article. You compare depth and nodes of Leela with other engines, which mean completely different things in MCTS and AB engines. Depth in AB engines refers to the number of iterative deepening steps that have been done. In MCTS there is no such thi...
by jorose
Wed Aug 21, 2019 12:45 pm
Forum: Chess Players Forum
Topic: Are the van Foreests the new Polgars?
Replies: 7
Views: 1900

Re: Are the van Foreests the new Polgars?

Going down in the rating list after world junior championships or similar is normal if you have a well established rating as most people there are underrated. A single tournament performance generally doesn't tell you much about a player anyways. As for Tommy's age, I would listen to the child as FI...
by jorose
Mon Aug 05, 2019 10:54 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Chess engine Olympiad. Germany
Replies: 26
Views: 4110

Re: Chess engine Olympiad. Germany

Just wanted to mention that last FabChess loss on time was on the last move before gaining time again, so likely an off by one error.

Some great matchups in this qualifier, I am enjoying following the event.
by jorose
Thu Jul 11, 2019 1:27 am
Forum: Computer Chess Club: General Topics
Topic: For data lovers only
Replies: 27
Views: 2730

Re: For data lovers only

That might have been true at some point in the passed, but nowadays the distributions match fairly closely in that rating range. 2200 Lichess blitz is roughly 2200 chess.com blitz. When analyzing the quality of the moves people play, it seems chess.com's 1300 elo players play at the same level as 1...