Search found 313 matches

by jorose
Wed Dec 06, 2017 12:57 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Google's AlphaGo team has been working on chess
Replies: 203
Views: 81656

Re: Google's AlphaGo team has been working on chess

Very cool! I am especially surprised they still relied on a MCTS approach in chess. I don't think anybody can actually reproduce these results at the moment with hardware at home but this certainly marks a significant shift in how computer chess will develop. I am curious what kind of performance th...
by jorose
Sat Dec 02, 2017 5:49 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: need some help assessing the evaluation
Replies: 5
Views: 2045

Re: need some help assessing the evaluation

Would you happen to have Linux binaries for Mat and Eve? Id love to take a look at the two engines, but my laptop doesn't have windows.
by jorose
Mon Nov 27, 2017 11:06 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Games of the on-line blitz tourney Nov 2017
Replies: 15
Views: 3612

Re: Games of the on-line blitz tourney Nov 2017

This was easily Winter's best tournament rating performance wise, but obviously it is still in a rating bracket where there is a lot of room to grow =) Game 1 was an interesting game where Winter played some sort of Noteboom Slav with white being further in development at the price of the pair of bi...
by jorose
Mon Oct 16, 2017 9:44 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Tapered Eval between 4 phases
Replies: 7
Views: 2531

Re: Tapered Eval between 4 phases

I use a generalization of this in Winter. I assume every position is from some set of k Gaussians. For every position evaluation I estimate the probability that a position is from each of those Gaussians and interpolate the evaluation based on the parameters I estimated for each Gaussian and these p...
by jorose
Mon Jul 03, 2017 12:29 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish - Initial position, MultiPV Mode=20, Depth=50
Replies: 29
Views: 5107

Re: Stockfish - Initial position, MultiPV Mode=20, Depth=50

Interesting...if you subtract bonus for side-to-move (Tempo = 20)... 1. Nf3 score drops to -0.03 Isn't this completely expected? Being the side to move is the exact advantage white has in the starting position so assuming the tempo bonus is tuned correctly you would expect an advantage in the start...
by jorose
Tue Jun 20, 2017 4:20 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is AlphaGo approach unsuitable to chess?
Replies: 19
Views: 11708

Re: Is AlphaGo approach unsuitable to chess?

This is really interesting to me. I find it really interesting that this factor 10 speed handicap seems to result in an Elo delta of 450 points :shock: How did you deal with things like futility and razoring margins? I wonder it is possible to classify positions on whether one evaluation function or...
by jorose
Wed Jun 14, 2017 5:52 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Linux testing pool
Replies: 17
Views: 3841

Re: Linux testing pool

I have been using SjaakII 1.3.1 to test my engine as I (incorrectly) assumed that to be the one tested on CCRL (which seems to be 1.3.0). My engine is slowly improving and I was wondering if you knew exactly how much stronger SjaakII 1.4.1 is?

Thanks again for publishing such a great engine!
by jorose
Fri Jun 09, 2017 9:30 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Check extension vs LMR
Replies: 26
Views: 7647

Re: Check extension vs LMR

Just wanted to thank you guys for the replies. I ended up implementing SEE with the most basic piece values you learn as a beginner (100, 300, 300, 450, 900, a large number for the king). It was certainly more work then the 3 lines of code it took me to implement futility pruning earlier this week (...
by jorose
Fri Jun 02, 2017 3:03 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Check extension vs LMR
Replies: 26
Views: 7647

Re: Check extension vs LMR

I have been very hesitant with implementing SEE, especially as how I understand it it probably has to be tuned somehow to work with the evaluation function? The value of piece extremely variable, ie SEE has to deal with active bishops and passive bishops, knights on a8 and knights on d4, is this typ...
by jorose
Fri Jun 02, 2017 2:37 pm
Forum: Computer Chess Club: General Topics
Topic: Ugly games
Replies: 1
Views: 646

Re: Ugly games

Winter plays lots of ugly moves in the opening whenever he plays without a book. For example the position after 8. ... bxc6 in the following game looks pretty bad: [pgn] [Event "Computer Chess Game"] [Site "jonathan-ThinkPad-T470s"] [Date "2017.06.01"] [Round "-"] [White "Chesley the Chess Engine! v...