Search found 115 matches

by Pio
Thu Aug 22, 2019 8:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What the heck happens here?
Replies: 12
Views: 1912

Re: What the heck happens here?

Can someone please explain what dendrograms show? They try to show the similarities between different engines. The more similar they are the closer they should be in the diagram. But you should not take the picture as the truth because the similarities are dependent on the metric used and the clust...
by Pio
Thu Aug 22, 2019 8:22 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: PVS, window, and mate
Replies: 20
Views: 2373

Re: PVS, window, and mate

I think I already started a similar discussion some months ago ... anyway I'm struggling to fix something inside Minic. Here's the thing : when doing a window search you gradually increase alpha and/or beta until the return score fits in the given interval. When an engine discover a deep mate, let'...
by Pio
Tue Aug 20, 2019 8:03 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What the heck happens here?
Replies: 12
Views: 1912

Re: What the heck happens here?

I took the Sim tester which has some 8,000+ quiet positions with unclear best move and tested engines, including versions of Lc0 nets, all at 1 second / position and additionally SF_dev at much longer 10s/position and 30s/poisition. Also, for some check, one Lc0 at 0.2s/position. Hardware: 4 i7 cor...
by Pio
Wed May 22, 2019 3:41 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Possible "real" hash collision
Replies: 27
Views: 4016

Re: Possible "real" hash collision

I probably gave the topic a bad title ... hash collision is most always a fantasy. Here Minic is probably more struggling with a lot of delaying checks and miss evaluate everything as a draw score thanks to repetition. But the plan for black is quite simple, put the two rooks on the 7th rank (to gr...
by Pio
Sat Jan 05, 2019 11:09 pm
Forum: Computer Chess Club: General Topics
Topic: Who is winning?
Replies: 3
Views: 497

Re: Who is winning?

Hi! I wonder who is winning here. I believe it is black but it seems Stockfish thinks otherwise. r3kr2/ppn5/3p4/2pPP1q1/2P1P2p/P1NB2p1/1P2Q3/R3B1K1 w q - 3 25 Not sure why you would doubt Stockfish. Cfish-dev says: +8.51 25. exd6 h3 26. Bd2 Qh4 27. Be3 O-O-O 28. e5 Rd7 29. Rf1 Rdf7 30. Rxf7 Rxf7 31...
by Pio
Sat Jan 05, 2019 10:14 pm
Forum: Computer Chess Club: General Topics
Topic: Who is winning?
Replies: 3
Views: 497

Who is winning?

Hi!

I wonder who is winning here. I believe it is black but it seems Stockfish thinks otherwise.

r3kr2/ppn5/3p4/2pPP1q1/2P1P2p/P1NB2p1/1P2Q3/R3B1K1 w q - 3 25
by Pio
Sat Dec 08, 2018 11:01 pm
Forum: Computer Chess Club: General Topics
Topic: AI offer/agree to a draw like a human?
Replies: 19
Views: 1959

Re: AI offer/agree to a draw like a human?

I am fairly sure that when he wrote score he meant win probability. There is no such thing in a chess engine, at least none of the top ones. If there is, it's packed with magic and guesses. Contempt is something else. Look at https://www.chessprogramming.org/Pawn_Advantage,_Win_Percentage,_and_Elo
by Pio
Sat Dec 08, 2018 10:20 pm
Forum: Computer Chess Club: General Topics
Topic: AI offer/agree to a draw like a human?
Replies: 19
Views: 1959

Re: AI offer/agree to a draw like a human?

The reversible move counter is a measure of (lack of) progress, and many engines taper the evaluation score gradually towards a draw when it gets above a certain value. This is a good idea, I'll try that. The reversible move counter can gradually lower the threshold for draws. I'm using my own engi...
by Pio
Wed Nov 28, 2018 10:09 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Java: white ? repeat : repeat;
Replies: 31
Views: 3615

Re: Java: white ? repeat : repeat;

Doing that together with favouring captures a lot (that could be merged in a similar fashion maybe) will lead to much better play where the engine will learn by itself. One nice property will be that generating an opening database will be very easy and you would actually more or less steal the open...
by Pio
Tue Nov 27, 2018 11:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Java: white ? repeat : repeat;
Replies: 31
Views: 3615

Re: Java: white ? repeat : repeat;

if I used popcount and some bmi2-instructions If you plan on doing so, then you need to know some what I learned today. 1) the intrinsics are not on the nuget server 2) they are on the myget server (still considered experimental) 3) you need to upgrade visual studio to the latest preview build if y...