Search found 3600 matches

by lkaufman
Mon Jul 04, 2011 4:36 pm
Forum: Computer Chess Club: General Topics
Topic: Komodo Question
Replies: 4
Views: 851

Re: Komodo Question

Yes, we plan to add tablebase support. From what I've read Gaviota seems to be the preferred option lately, but we are open to advice on this topic.
by lkaufman
Sun Jul 03, 2011 5:31 am
Forum: Computer Chess Club: General Topics
Topic: now after seeing all of this go down can anyone beat Vas
Replies: 46
Views: 8154

Re: now after seeing all of this go down can anyone beat Vas

I do not want to discuss the Rybka/Fruit issue here, but to address some of your points. I added somewhere between 50 and 100 elo just from eval to Rybka from version 2.2 to Rybka 3, the period I worked on Rybka's eval, so clearly eval is worth much more than 20 elo. Rybka's eval was its weak point ...
by lkaufman
Sun Jul 03, 2011 5:15 am
Forum: Computer Chess Club: General Topics
Topic: A 4000 Elo chess entity....
Replies: 15
Views: 2091

Re: A 4000 Elo chess entity....

Lately it seems that the top players are able to draw with Black against each other most of the time. Openings have been analyzed so deeply that we can say with reasonable confidence that White can maintain an advantage into the endgame, but not enough to win with correct play. So with White top pla...
by lkaufman
Sun Jul 03, 2011 4:58 am
Forum: Computer Chess Club: General Topics
Topic: now after seeing all of this go down can anyone beat Vas
Replies: 46
Views: 8154

Re: now after seeing all of this go down can anyone beat Vas

"The problem is there is disagreement on where the line should be drawn. Larry suggests PST + material values should not be used, or modified versions within a few centipawns. Well, what if a program uses the PST but not the material values? or the material values and not the PST? What if someone sp...
by lkaufman
Sun Jul 03, 2011 2:24 am
Forum: Computer Chess Club: General Topics
Topic: now after seeing all of this go down can anyone beat Vas
Replies: 46
Views: 8154

Re: now after seeing all of this go down can anyone beat Vas

Please excuse my ignorance because I'm not a programmer and I might have misunderstood, but surely it's okay for more than one chess engine to be using what are considered to be the standard piece values (such as pawn=1 bishops and knights=3, etc)? And if that is the case, surely you can't really p...
by lkaufman
Sun Jul 03, 2011 1:15 am
Forum: Computer Chess Club: General Topics
Topic: now after seeing all of this go down can anyone beat Vas
Replies: 46
Views: 8154

Re: now after seeing all of this go down can anyone beat Vas

To my thinking a key question is whether taking numerical values from another program is allowed or not. I mean things like piece square tables, mobility weights, bishop pair bonus, etc., things which can have a huge number of possible values. I don't mean things like number of moves reduced in LMR ...
by lkaufman
Sun Jun 19, 2011 3:48 pm
Forum: Computer Chess Club: General Topics
Topic: Komodo 2.03 release is imminent
Replies: 84
Views: 19954

Re: Komodo 2.03 release, but Carlsen play really different

It is true that black is already in a tough spot. The moves leading up to this position, starting from : [d]r3kb1r/1p1n1ppb/1qp4p/p4P2/P1BP4/2N5/1P4PP/R1BQ1RK1 b kq - 0 17 were 17...Nf6? (Be7!) 18. Qe2 Be7 19.b3 Kf8? Komodo's 17...Nf6 surely deserves a question mark, but with 19...Kf8 black opts to...
by lkaufman
Sun Jun 19, 2011 2:02 pm
Forum: Computer Chess Club: General Topics
Topic: Observations about Komodo 2.03
Replies: 16
Views: 3388

Re: Observations about Komodo 2.03

I guess I should not disagree with a World Champion :mrgreen: But the 2nd position isn't even a sacrifice and Komodo also doesn't choose Bxf7 either. [D]1q6/r4pbk/1r1p2pp/B2Pn3/Q2NP3/1p3P2/6PP/1R3RK1 b - - 0 1 . Well, in the second problem Komodo discovered that Bb3 wins material, so alternate move...
by lkaufman
Sun Jun 19, 2011 4:49 am
Forum: Computer Chess Club: General Topics
Topic: Observations about Komodo 2.03
Replies: 16
Views: 3388

Re: Observations about Komodo 2.03

Some modern ideas need hash tables, some benefit from them but would still be good without them, and some are pretty much independent of them. I think simply null move alone is enough to make any decent 8 bit program beat the best ones without it.
by lkaufman
Sun Jun 19, 2011 2:14 am
Forum: Computer Chess Club: General Topics
Topic: Observations about Komodo 2.03
Replies: 16
Views: 3388

Re: Observations about Komodo 2.03

It's true that most testing is done at very fast levels now. However it is still typical to reach depths around 15 plies at the levels the developers use and around 18 plies at the fastest levels used by the testing organizations, far more than was possible "back in the day". Furthermore there is en...