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Up Topic Rybka Support & Discussion / Rybka Support / a Question to Vasik Rajlich
- - By Gizchehs Defender (***) [nl] Date 2012-04-09 17:45
http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=24691

I Concisiously did not asked you this but the Rybkian Community at first, however the People here don't seem to have this Knowledge or don't want to share it ( is it Legal? ); you are Possibly my last Resource to get clear wether it is Possible or not.
'... Or few people have the Knowledge and want to share it, People that I haven't met yet.

Yours Truthfully,
Gizchehs Defender
Parent - - By Homayoun_Sohrabi_M.D. (***) [us] Date 2012-04-09 18:17
Please please understand that I don't say this in a disrespectful manner, but it's very difficult to understand what you are saying and what you are asking.   Maybe that's why no one has answered you.   Do you have a very specific question?
Parent - - By Gizchehs Defender (***) [nl] Date 2012-04-10 15:15 Edited 2012-04-10 15:18
Ok, I want the Codings of Rybka 2.3.2a mp 32-bit.

Here is an Example: http://waters.me/trying-to-beat-chess-computers/

Look at Crafty at Evaluation Functions.
I also want the Numbers and '' Codes '' behind it the Area's of the Evaluations, so that, when I doubt about more than one move the Engine might wants to make, I can see what's more important for her and can use that to my Advantage.

If you don't exactly know what I mean, here is the list:

Crafty for example includes the knowledge of these area in its evaluation function;

* Material
* Trapped Bishops (e.g. White Pawns b3, c2, Black Bishop a2)

* Development
* King Safety
* Trapped Rooks (e.g. White Pawns f2,g2,h2, Rook h1, King f1)
* Weak Back Rank
* Knight/Bishop Outposts
* Centralisation
* Bishop Pair
* Pawns on same colour as a single Bishop
* Rooks on Open Files
* Doubled Rooks
* Rooks behind passed pawns
* Rooks on the 7th Rank
* Bishops of Opposite Colour
* Developing minor pieces before the Queen
* Various end games related advantages – such as avoiding having the wrong rooks pawn in a King and Bishop ending.
* Passed Pawns
* Isolated and Backward pawns
* Doubled Pawns

Thanks in Advance :roll:
Parent - By Homayoun_Sohrabi_M.D. (***) [us] Date 2012-04-10 16:25

> Ok, I want the Codings of Rybka 2.3.2a mp 32-bit.


the program code?   That's not available to anyone except the program author.

I think you want to know some trick (or weakness) where you can beat Rybka.   Well, there is no human being on earth that can beat Rybka at full strength so what you are asking for is impossible. 

But you can play a weakened program and try to beat it.   

Free options:  try Haundrix Chess, it's really nice, it has Crafty and a couple of other engines, you can adjust the strength of Crafty and play it from anywhere between practically zero strength to full strength.   

If you don't mind spending a few dollars, you can buy Chessmaster, Fritz, Shredder, etc, all of them allow you to adjust the strength of the playing program.
Parent - - By Labyrinth (*****) [us] Date 2012-04-11 01:43
I asked about Rybka 3's base ratings for material (ie. pawn worth, knight worth) and they would not tell me this much, so, no luck getting info on those other things :-) Is all secret :-)
Parent - - By Gizchehs Defender (***) [nl] Date 2012-04-15 21:47
Even that it is a Demo version?
And... it was the Final Version:

You can download Rybka 2.3.2a for free. Rybka 2.3.2a was the final version of the Rybka 2 series.

So how can I Publicate this unauthorized?

1: It was the Final Version.

2: It is a Demo Version ( and it can be Beaten by a Human, this is a Misunderstanding I face everyTime - it's not a Top-Engine; the Demo Version the more, look: http://www.playchess.com/stats/engineranking.htm ) < Or is this not Accurate because of Popularity or something?

... For if that's the matter.

Can you ask that to Vasik Rajlich or do you know the answer yourself?

And Roman Dzindzichashvili can or could certainly beat this Engine.
Sometimes I think that the Engine makes a Mistake in a move - Supported by the Idea that '' it is a Demo Version '' - when I can manage to get a Closed Position, more or less.
But ofcourse, it is ( Far ) more Plausible that I thought Wrong.
Parent - By Nelson Hernandez (Gold) [us] Date 2012-04-15 23:43

> And Roman Dzindzichashvili can or could certainly beat this Engine.


Not with a professional opening book and top-notch hardware he couldn't.  Maybe in a single game yes, but in a match, no way.
Parent - - By Labyrinth (*****) [us] Date 2012-04-16 01:14

>Even that it is a Demo version?


Probably even still.

You'd have a much easier time getting this information from someone who has disassembled the code.

>Sometimes I think that the Engine makes a Mistake in a move - Supported by the Idea that '' it is a Demo Version '' - when I can manage to get a Closed Position, more or less.


There was a chess lecture at chesslecture.com by Eugene Perelshteyn in which he drew a game against Rybka (I forget which version, probably 3) and stated that it had a weakness in its understanding of fortressing.

If you've heard of "father" (search his nickname here on the forum), he makes these super blocked positions and will sometimes beat Rybka on time or he gets the engine to make a mistake in time pressure and pulls out a win. So some weakness exists at least in Rybka in regards to blocked positions.
Parent - By Gizchehs Defender (***) [nl] Date 2012-04-17 17:09
The Point of that we '' don't understand '' is that I don't play with Time and you mean people who play with Time.
I can think longer than 1 and a half hour for one Move.
There are days I just make 3 moves in a Chess game, and all Chess Games, so you shouldn't be Surprised that I'm a Devoted Correspondance ChessPlayer.

Now I don't say that this is good, but I just like to think and dream away with the Stratagy and with myself in the Universum of Chess.
When playing with Time I Fail, I know that from myself as I am not a Naturally favoured Tactician and I will Blooper all the way and lose interest in Chess, such as once happened in the past when I semi Played with Time...

Eventually you are the one who is right; It's me to Blame that I have Compared my Personal Situation to the Proffessional one.
Ofcourse GrandMaster Mankind .VersuS. Machine Matches are played with Time - favouring the ChessComputer - and not Correspondance like as with Correspondance Chess you can Cheat.
Though, Cheating seems unplausible from a GrandMasters who has so his/her Honor ( to spare ).
But what if there is a Big Money Price available?
Well, then it gets more Plausible yes.
- By Gizchehs Defender (***) [nl] Date 2012-04-17 17:32 Edited 2012-04-18 18:17
This Topic does not neccesarily need to be Locked, but this Case is Closed.
I know what I want to know.
I need to find someone who Disassembled the Code of Rybka 2.3.2a mp 32-bit
Up Topic Rybka Support & Discussion / Rybka Support / a Question to Vasik Rajlich

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