Search found 182 matches

by jorose
Sat Feb 16, 2019 6:12 am
Forum: Computer Chess Club: General Topics
Topic: You lost to a cheater
Replies: 4
Views: 552

Re: You lost to a cheater

I have experienced cheaters a few times on Lichess, but generally it is very rare and the people I suspect are usually caught rather quickly and the points being refunded. Probably the bigger issue for me is that I tend to let it tilt me a bit too much and I used to keep playing after such games. My...
by jorose
Mon Feb 11, 2019 1:58 pm
Forum: Computer Chess Club: General Topics
Topic: RubiChess 1.3
Replies: 2
Views: 278

Re: RubiChess 1.3

Congrats on the new release!
by jorose
Mon Feb 11, 2019 1:09 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Lc0 and future of rating lists
Replies: 11
Views: 821

Re: Lc0 and future of rating lists

Leela is also on CCRL eg. http://www.computerchess.org.uk/ccrl/404/cgi/compare_engines.cgi?family=Leela%20Chess&print=Rating+list Issue is these rating lists are normalized to some decades old CPU. Comparing an Athlon 64 X2 4600+ with a GTX 2060 is not really fair. Furthermore normalizing hardware b...
by jorose
Sat Feb 02, 2019 9:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: So, how many of you are working on neural networks for chess?
Replies: 22
Views: 1324

Re: So, how many of you are working on neural networks for chess?

I think still NN engines even on higher-end commercial graphics cards play blunders at a pretty high rate. Its not the NN evaluation that is the problem. Its the monte-carlo tree search, and it cannot be solved with tweaks to the evaluation or the monte-carlo tree search. The solution is to stop us...
by jorose
Sat Feb 02, 2019 3:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: So, how many of you are working on neural networks for chess?
Replies: 22
Views: 1324

Re: So, how many of you are working on neural networks for chess?

I think still NN engines even on higher-end commercial graphics cards play blunders at a pretty high rate. I think there is probably room for a hybrid approach where maybe the NN is suggesting moves to a deep searcher, but I am not aware of anyone pursuing that. Personally I have a pretty long to-d...
by jorose
Sat Feb 02, 2019 1:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: So, how many of you are working on neural networks for chess?
Replies: 22
Views: 1324

Re: So, how many of you are working on neural networks for chess?

I think still NN engines even on higher-end commercial graphics cards play blunders at a pretty high rate. I think there is probably room for a hybrid approach where maybe the NN is suggesting moves to a deep searcher, but I am not aware of anyone pursuing that. Personally I have a pretty long to-d...
by jorose
Fri Feb 01, 2019 11:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: So, how many of you are working on neural networks for chess?
Replies: 22
Views: 1324

Re: So, how many of you are working on neural networks for chess?

One of the main reasons I am not working on an NN based engine is that I feel I don't have the resources. I think very few people have the resources to seriously train and test a NN based engine. Reinforcement learning based NN engines are even worse in that regard. I don't understand how it matters...
by jorose
Fri Feb 01, 2019 6:31 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: CEO. Edition II.
Replies: 17
Views: 591

Re: CEO. Edition II.

Hi Sergio, As I mentioned before, I would be honored if Winter got to play for Switzerland again. Hopefully it will manage first seed this time :) On a side note, I am trying to convince a friend to try for a late entry. He will be busy for the next two weeks, but after that I am hoping he will run ...
by jorose
Sat Jan 26, 2019 7:28 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: How powerful is the Queen compared to 2 Rooks ?
Replies: 104
Views: 2718

Re: How powerful is the Queen compared to 2 Rooks ?

That's not how chess works. In your position where one side gives up the queen and the other side gives up both rooks there are a number of factors which are very favorable for the queen. Eg there are still many minors on the board, there are no open files and it is harder to get the rooks actively ...
by jorose
Fri Jan 25, 2019 9:12 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Null move pruning, only when score >= beta?
Replies: 8
Views: 464

Re: Null move pruning, only when score >= beta?

There is only one way to find out. You make the change and measure the difference. Iirc in Winter it was below the threshold I could actually measure with my resources at the time, meaning it was single digit. Every engine is different though. It's quite possible the condition should not be added in...