Search found 795 matches

by PK
Mon Nov 04, 2019 1:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Limiting nodes to reduce engine strength
Replies: 18
Views: 1343

Re: Limiting nodes to reduce engine strength

this might be of interest: http://web.ist.utl.pt/diogo.ferreira/papers/ferreira13impact.pdf Using node limit instead of depth would eliminate problem of too shalow endgame searches and would silently take into account position complexity. And Your formula would be convertible using som kind of nodes...
by PK
Mon Nov 04, 2019 7:30 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Limiting nodes to reduce engine strength
Replies: 18
Views: 1343

Re: Limiting nodes to reduce engine strength

Denis, does Your formula allow to calculate percentage of depth 1 and depth 2 searches needed to achieve, say, 1200 Elo?

Edit: stupid me, it's pretty obvious when you see that Elo maps to fractional depth.
by PK
Mon Oct 28, 2019 7:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Pawn hash table, a little disappointment
Replies: 15
Views: 993

Re: Pawn hash table, a little disappointment

What is your pawn hash? Pawns only or pawns and kings? With pawns only, my speed gain has been very modest. With pawns and kings, hashing pawn shield and pawn storm scores, it became something like 10%.
by PK
Sun Oct 27, 2019 3:33 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Limiting nodes to reduce engine strength
Replies: 18
Views: 1343

Re: Limiting nodes to reduce engine strength

Weakening a chess engine in a realistic way might well be the single most difficult task in our domain. What's more, different methods are not really comparable with each other. And even if you succeed in calibrating engine's strength in a way that satisfies you, it's usually enough to change the ti...
by PK
Mon Oct 14, 2019 1:22 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish/Honey options with underscores and Chessbase
Replies: 6
Views: 1085

Re: Stockfish/Honey options with underscores and Chessbase

Don't know about ChessBase. Under Arena it is menu Levels -> Limit Playing Strength by Elo.
by PK
Mon Oct 14, 2019 8:51 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish/Honey options with underscores and Chessbase
Replies: 6
Views: 1085

Re: Stockfish/Honey options with underscores and Chessbase

UCI_LimitStrength is handled by the GUI elsewhere. It is part of UCI specification, so changing it to a version without underscore breaks this specification, see: http://wbec-ridderkerk.nl/html/UCIProtocol.html
by PK
Wed Oct 09, 2019 7:52 am
Forum: Computer Chess Club: General Topics
Topic: what is the best engine for big material handicap?
Replies: 70
Views: 13129

Re: what is the best engine for big material handicap?

OK, this makes sense. For me chess per se ends where different movement rules are introduced, and Your "normal chess"
may well end sooner.
by PK
Wed Oct 09, 2019 6:46 am
Forum: Computer Chess Club: General Topics
Topic: what is the best engine for big material handicap?
Replies: 70
Views: 13129

Re: what is the best engine for big material handicap?

So, if I invite you to a chess tournament and you register, and then you shake the hands of your opponent and the game starts, wouldn't you be shocked if the TD came to your board and set up some random chess puzzle from where you have to play, and are informed that the next 19 rounds would also st...
by PK
Wed Oct 09, 2019 6:29 am
Forum: Computer Chess Club: General Topics
Topic: what is the best engine for big material handicap?
Replies: 70
Views: 13129

Re: what is the best engine for big material handicap?

Handicap go is still go. Handicap shogi is still shogi. Hearts of Iron on "civilian" settings with several buffs is still Hearts of Iron. I don't buy the idea that handicap chess is not chess. Game mechanics and rules remain the same, so it is the same game. Otherwise you would have to argue that ch...
by PK
Wed Oct 09, 2019 4:21 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Eval hashtable replacement scheme
Replies: 4
Views: 1497

Re: Eval hashtable replacement scheme

No, not much speed gain, 1% for 10 minutes of coding, more if searches are short. Of course I'm not aiming for GM strength (more like a NM plus many weak levels), the app is indeed meant for casual players on cell phones. Out of curiosity, I tested this scheme in a full-blown C++ engine, with the sa...