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11

Yes. The search, evaluation, etc., are almost identical to Stockfish, with the notable exception of being rewritten in Dutch. A number of Stockfish developers, including former maintainers, have noted as such. To hide its origins, code was included that multiplied the node count by 8/7. Exploiting modular arithmetic tricks and archived Houdini games, this ...


7

EDIT: With the advent of Lc0 and the new Stockfish 13, unfortunately this question is now beyond human comprehension. I am not very well versed on the theory of chess computer programs, but I've used them for a long time. At first, I used Houdini, then switched for a few months to Rybka, back to Houdini, had another short incursion into Komodo, back to ...


6

In contrast to Rauan Sagit, I'm going to offer some reasons I think any human should (assuming they don't get lucky and play some computer-level games themselves) lose such a match. Elo differential: As of Nov.15, 2014, the highest-ranked engine on CCRL 40/40 is Komodo with an Elo of 3303 on relatively modest hardware of an Athlon 64 X2 4600+ 2.4 GHz (...


4

Reviewing the Stockfish Issues/Bugs and commits & Releases on GitHub https://github.com/mcostalba/Stockfish/releases/ would indicate that this has not been logged as an issue or a bug. In addition I am unable to locate any instances of users reporting the same faults that Houdini had with Stockfish. In addition if you review the commit difference ...


4

I saw the code and there is no doubt that code was stolen form Stockfish Here's a small snippet that I saved. I no longer have the code since I found out it also includes code stolen from komodo ( reversed engineer). There are many many examples just like this, The one of the right was from Houdini, the one I the left is from the Stockfish repository from a ...


4

The alleged source code might have been published online. I took a quick look into it, it looked like a valid strong chess engine. It was not a clone of Stockfish in the sense that the codebase was quite different, certainly not a 10 minutes copy-and-paste. It would've taken even the best talent months (or years?) of hard work to develop it, so it doesn't ...


4

A user on talkchess.com (by the name of cucumber) claims to have come into possession of Houdini's source code, and has noted a number of similarities between it and Stockfish's source code. In particular, they note that the Makefile contains the phase 'to build Stockfish' and they link a screenshot of a search function which appears to be Stockfish's, but ...


4

Rybka/Komodo/Houdini are not open source and their values aren't readily available, but the current strongest conventional engine, Stockfish, uses these values (lines 182-186): PawnValueMg = 128, PawnValueEg = 213, KnightValueMg = 781, KnightValueEg = 854, BishopValueMg = 825, BishopValueEg = 915, RookValueMg = 1276, RookValueEg = 1380, ...


3

What you're doing here is not correct and definitely not what a chess engine is designed for. You're running multi-pv analysis with many many lines. Multi-PV with many lines as in in your example is exponentially slower than a single-PV analysis. In an N multi-PV analysis, the engine would need to examine the first PV then ignore it for the next best PV. And ...


3

The side selected for castling is generally related to the openings chosen by the player. Long castling has the following attributes: lands a rook on a center file where short castling does not. takes more time since an additional piece must be moved (the queen). leaves the pawn on the a-file undefended. Finally, when the players castle on opposite wings, ...


3

Although I know you're on a Mac and I don't know what you've tried so far in detail, this scid-users mailing list thread might be of interest. It suggests to add the exe file in as the command, but without the wine before it. Again, that is for Ubuntu, but maybe it will help.


3

These are the values used by Crafty - one of the best open source chess engines. # define PAWN_VALUE 100 # define KNIGHT_VALUE 325 # define BISHOP_VALUE 325 # define ROOK_VALUE 500 # define QUEEN_VALUE 1050 # define ...


3

Let's see what happens if we just look at the math. According to the FIDE handbook, a rating difference of 422 points would mean the engine would get an average score of about 0.93 per game. Assuming that the human player is only going to draw and not win, that results in the computer winning about 86% of the time, and the human drawing 14%. If the ...


3

No. Chess computers are now fantastically strong. To put things in perspective: In 2006, then undisputed world champion Kramnik lost a match against Deep Fritz. Four years later, in 2010, Deep Fritz had been further developed into Deep Rybka 4. If you look at Wikipedia's page on Fritz, Deep Fritz was over a hundred elo weaker than Deep Rybka 3, and Deep ...


2

Any top human would be annihilated under those conditions. Even a mobile phone can destroy any human in a ten game match even under those conditions. The only hope would be those conditions plus give the human an exchange odds in every game.


2

Deep Fritz 14, Houdini 4, Komodo 9 and Rybka 4 all use the same Graphic User Interface (GUI). It allows you to blundercheck, do full game analysis, calculate elo ratings for sets of games. It has a Handicap and Fun mode for dumbing down these engines, so you have a chance. You can also play timed games, and adjust the engine's style. There is also a ...


1

Chessbase is indeed just a database program, albeit a very powerful one. If Houdini doesn't already provide it then you will need some kind of front end to play games against it. One of the best free ones is Scid vs PC. This is available for download on Sourceforge and if you need more help getting started with it then there is much useful information on ...


1

Just adding a few details to Student T's answer: Fritz denotes a chess engine as well as an (graphical user) interface. The reason for this is a historical one. Back in the times, almost all commercial chess engines would bring their own interfaces (Fritz, ChessAssistant, Shredder, Rebel, ...) - and a lot more stuff like databases. The hegemony of those ...


1

Houdini is a chess engine written by an external developer. It is not a user interface that you can visually interact. This is where the confusion: when ChessBase mentions Houdini, they actually mean running the Houdini chess engine on their ChessBase user-interface. If you search on Wikipedia, Houdini is simply a chess engine and has nothing to do with ...


1

How did you run the game? Did you run it by a fixed-depth? How much time did you give to the engine? I assume that you gave the engine either too little time or a fixed depth. In this case, the engine might not know the shortest way for a mate, because to the engine any move that doesn't lose the queen is the same. It only starts moving the king, when it ...


1

Someone on Talkchess did a test getting the top engines to play against each other in an opening which required an understanding of pawn breaks, such as the King's Indian or Stonewall. Houdini, Komodo, Rybka and Stockfish all struggled in these positions refusing to advance their pawns, and pursuing ephemeral tactical gains instead. At blitz time controls, ...


1

In short, you don't have an engine installed that is able to use the mate search function. The scrollable box should show all engines you have installed that are capable of the mate search function, so either you don't have one installed (unlikely if you have a legitimate copy of Fritz 12) or the UI is unable to recognize it for some reason.


1

There is nobody in the world can answer you confidently. It requires deep source-code level understanding of the engines. However, some of the engines you mentioned are close-source, which means it's simply not possible to get an answer for all engines. However, I can answer about Stockfish, which I have studied. Stockfish doesn't attempt to optimize ...


1

I have the strong commercial chess engine Shredder Classic 4. When I open up its engine options I get the default strengths of the pieces. Without reading the documentation of this engine it seems that Shredder starts off with the traditional piece values of queen = 9.5 pts, rook = 5 pts and so on. Then there are optional sliders where I could make any type ...


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