Search found 1121 matches

by Gian-Carlo Pascutto
Tue Oct 22, 2019 2:15 pm
Forum: Computer Chess Club: General Topics
Topic: interesting TCEC game/test position
Replies: 4
Views: 198

Re: interesting TCEC game/test position

It appears the CPU machine that Ethereal was running on was affected by processes hanging around from an engine that previously run, and this game will be replayed.
by Gian-Carlo Pascutto
Tue Oct 22, 2019 1:39 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: UCI Win/Draw/Loss reporting
Replies: 2
Views: 177

Re: UCI Win/Draw/Loss reporting

I am curious why you use prefix UCI_ ? Does it mean standard? From the UCI spec: If the GUI get an unknown Option with the prefix "UCI_", it should just ignore it and not display it in the engine's options dialog. If the GUI doesn't know about the option, it won't be able to display the information...
by Gian-Carlo Pascutto
Tue Oct 22, 2019 9:29 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: PGN standard, its improvement and standardization
Replies: 53
Views: 3540

Re: PGN standard, its improvement and standardization

Also, I believe that UCI doesn't send a game result/end game flag to the engine, so if you are doing any post-game processing, you have to infer when this occurs, rather than being told explicitly. Depending on the circumstances you can coax ucinewgame for this, or just detect when the current posi...
by Gian-Carlo Pascutto
Tue Oct 22, 2019 9:22 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: UCI Win/Draw/Loss reporting
Replies: 2
Views: 177

UCI Win/Draw/Loss reporting

Someone pointed me a while ago (I forgot where, might've been TCEC chat) to this: https://github.com/DanielUranga/lc0/commit/4013c6042c6de540b07d31e840797f0df2f06db2 Which is allegedly how Fat Fritz does WDL reporting? I have no idea if this is accurate, but in general I feel it would be useful to s...
by Gian-Carlo Pascutto
Wed Sep 25, 2019 9:26 am
Forum: Computer Chess Club: General Topics
Topic: My failed attempt to change TCEC NN clone rules
Replies: 92
Views: 8621

Re: My failed attempt to change TCEC NN clone rules

My argument is that I don't see the difference between basing a program on Alpha Zero and renaming it Leela Leela Zero was named "Leela" Zero because it was based on Leela's code. A program that already existed since ~2008. It used the method from the Alpha "Zero" paper and that's indeed where the ...
by Gian-Carlo Pascutto
Mon Sep 23, 2019 9:32 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: top engines vs 2400 engine knight odds matches
Replies: 16
Views: 2062

Re: top engines vs 2400 engine knight odds matches

My first thought was that perhaps it is due to the training setup not having any way to arrive in these kind of "opening but immediately 2 knights down" situations, combined with a failure of the network to generalize. But it happens in middlegame positions too. [D}r1b2rk1/pp1nqppp/2p5/4p3/3P4/2R1P3...
by Gian-Carlo Pascutto
Mon Sep 23, 2019 7:11 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: top engines vs 2400 engine knight odds matches
Replies: 16
Views: 2062

Re: top engines vs 2400 engine knight odds matches

The eval should be something like twice as bad when down two knights as when down one. The version I tested of your engine thinks it's actually better to be down two knights than one knight!! The raw eval in the starting position is allright (-1.6 vs -2.4). I wonder if it gets confused wrt developm...
by Gian-Carlo Pascutto
Mon Sep 23, 2019 4:55 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: top engines vs 2400 engine knight odds matches
Replies: 16
Views: 2062

Re: top engines vs 2400 engine knight odds matches

Thanks. Unfortunately it is just as hopeless at giving knight odds as the newer Lc0 networks are, they both just give away pieces almost as if they were playing giveaway chess. It's easy to see the reason: the eval for queen odds is less negative than the eval for pawn and two move odds (remove f7,...
by Gian-Carlo Pascutto
Mon Sep 23, 2019 2:42 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Syzygy DTZ data explaination?
Replies: 9
Views: 1813

Re: Syzygy DTZ data explaination?

Fathom ranks (and scores) all winning moves the same unless the probe code indicates the position has been repeated (i.e. that the engine is failing to make progress by itself).
by Gian-Carlo Pascutto
Mon Sep 23, 2019 2:41 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: top engines vs 2400 engine knight odds matches
Replies: 16
Views: 2062

Re: top engines vs 2400 engine knight odds matches

You can try this with Stoofvlees as well (you should have a copy). I expect it to do even better than lc0. I've been too busy to check it out, but since you made this comment I'm motivated to check it out next week when I should have time. Is this the chess analog of the Leela Go situation where th...