Search found 400 matches

by Ralph Stoesser
Wed Apr 29, 2015 3:06 pm
Forum: Computer Chess Club: General Topics
Topic: Pawn specifications
Replies: 12
Views: 2199

Re: Pawn specifications

I've always suspected you to be a secret Komodo agent because of your chain bonuses that are clearly incompatible with SF. 8-)
by Ralph Stoesser
Wed Apr 08, 2015 11:00 pm
Forum: Computer Chess Club: General Topics
Topic: Closed positions flag
Replies: 54
Views: 7131

Re: Second definition for a closed position

[d]2rq1rk1/pp2bppp/2n1bn2/1B1p2B1/3N4/2N1P3/PP3PPP/2RQR1K1 w - - 0 1 OK, an open position. How many reasonable moves you have that do not change significantly the score from the best move? Maybe 2 or 3, 4th and 5th choices might already differ significantly from the best move. Please note how abund...
by Ralph Stoesser
Mon Feb 23, 2015 8:18 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: ICGA's 2015 World Computer Chess Championship/Events
Replies: 256
Views: 59516

Re: ICGA's 2015 World Computer Chess Championship/Events

SF shouldn't participate in any tournament because Tord Romstad feel depressed and thinks competition is bad. That's a very good reason. Marco comdemns ICGA from deapest heart so SF shouldn't participate. Another very good reason. Lucas is so upset about that tournament that he isn't even able to un...
by Ralph Stoesser
Mon Feb 23, 2015 9:22 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: ICGA's 2015 World Computer Chess Championship/Events
Replies: 256
Views: 59516

Re: ICGA's 2015 World Computer Chess Championship/Events

I agree it would be fun to have the best engines competing. From my point of view SF should compete anywhere. Apart from the fun of competition it could only help to get more data about possible weaknesses. But how can it happen? It wouldn't be enough to find people willing to do the operator job an...
by Ralph Stoesser
Mon Feb 23, 2015 7:53 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: ICGA's 2015 World Computer Chess Championship/Events
Replies: 256
Views: 59516

Re: ICGA's 2015 World Computer Chess Championship/Events

APassionForCriminalJustic wrote:
Ralph Stoesser wrote:Kommodo 9 @ICGA but not Stockfish? How exciting... What do you think who will win? ;)
Komodo is far too strong for all of the other ICGA participants. It should win quite easily.
Since SF is a community efford, who exactly is entitled to decide whether SF should participate?
by Ralph Stoesser
Sun Feb 22, 2015 11:27 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Detail evaluation within quiescence search
Replies: 18
Views: 2929

Re: Detail evaluation within quiescence search

We don't compare with silent moves in qsearch. This is not precise but it's the idea of qsearch to only quickly resolve the most tactical issues. There is a tradedown between speed and accuracy as so often in chess programming. Qsearch is not precise by design. If I understood right, you want to try...
by Ralph Stoesser
Sun Feb 22, 2015 9:05 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Detail evaluation within quiescence search
Replies: 18
Views: 2929

Re: Detail evaluation within quiescence search

Even in case the swing from detail evaluation would be very small, you still want to know it. If you have 2 equal captures, one of them leading to slightly better mobility score, you still want to know about the difference and propagate the best you can estimate back to earlier nodes.
by Ralph Stoesser
Sun Feb 22, 2015 8:51 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Detail evaluation within quiescence search
Replies: 18
Views: 2929

Re: Detail evaluation within quiescence search

I think it's always more precise too look at all aspects of the position after a capture move. After all you have to decide which capture sequence the best one. If you have f.i. two pawn captures for the side to move, one them leads to a pawn weakness like a double pawn, the other pawn capture does ...
by Ralph Stoesser
Sun Feb 22, 2015 8:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Detail evaluation within quiescence search
Replies: 18
Views: 2929

Re: Detail evaluation within quiescence search

It could not be avoided, that possibly a not investigated non capture would lead to a better detail evaluation than the best quiescence path. Thus using detail evaluation within the quiescence search cannot lead to more precision. Where am I wrong within my thoughts? It seems to me you only need on...
by Ralph Stoesser
Sun Feb 22, 2015 6:41 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: ICGA's 2015 World Computer Chess Championship/Events
Replies: 256
Views: 59516

Re: ICGA's 2015 World Computer Chess Championship/Events

Kommodo 9 @ICGA but not Stockfish? How exciting... What do you think who will win? ;)